Bharat Sanchar Nigam Ltd. [BSNL] will recruit about 3945 [subject to variation depending on the availability of vacancies] Junior Telecom. Officers (JTOs) through a competitive examination to be held on 21st June 2009 on all India Basis.
TOTAL POST:
JTO (Telecom) - 3545
JTO (Civil) - 3545
JTO (Electrical) - 3545
PAY SCALE: 9850-250-14600
QUALIFICATION:
Applicant must possess as on 31.12.2009, Bachelor of Engineering/Bachelor of Technology or equivalent Engineering degree in any of the following disciplines from a recognized engineering college/university:
i. Telecommunication,
ii. Electronics,
iii. Radio,
iv. Computer,
v. Electrical.
vi. Information Technology
vii. Civil
CLOSING DATE OF RECEIPT OF APPLICATION : 06.04.2009
EXAMINATION DATE : 21.06.2009
For Information related to Syllabus and Application form download form from BSNL Website http://www.bsnl.co.in/company/job.htm
THOSE WHO APPEAR LAST YEAR CAN PUT COMMENT AND SAMPLE PAPER HERE.
SAMPLE PAPER FOR BSNL JTO EXAM
ReplyDelete1. One of the following statement which is true for relative dielectric constant is -
a) It is dimensionless
b) It is not equal to unity for vacuum
c)) It?s value for all substances is less than one
d)) None
2. Pure metals generally have-
a) high conductivity and low temperature coefficient
b) high conductivity and large temperature coefficient
c) low conductivity and zero temperature coefficient
d) low conductivity and high temperature coefficient
3. For small size, high frequency coils, the most common core material is
a) Air
b) Ferrite
c) Powdered ion
d) Steel
4. For an abrupt junction Varactor diode, the dependence of device capacitance (C) on applied reverse bias (V) is given by-
a) C a V1/3
b) C a V-1/3
c) C a V1/2
d) C a V-1/2
5. A superconductor is a-
a) A material showing perfect conductivity and Meissner effect below a critical temperature
b) A conductor having zero resistance
c) A perfect conductor with highest dimagnetic susceptibility
d) A perfect conductor which becomes resistive when the current density through it exceeds a critical value
6. When a semiconductor based temperature transducer has a temperature coefficient of ?2500 mV/0C then this transducer is indeed a-
a) Thermistor
b) Forward biased pn junction diode
c) Reverse biased pn junction diode
d) FET
7. The location of lightning arrestor is -
a) Near the transformer
b) Near the circuit breaker
c) Away from the transformer
d) None
8. Time constant of an RC circuit increases if the value of the resistance is -
a) Increased
b) Decreased
c) Neither a nor b
d) Both a and b
9. Intrinsic semiconductors are those which -
a) Are available locally
b) Are made of the semiconductor material in its purest from
c) Have more electrons than holes
d) Have zero energy gaps
10. The primary control on drain current in a JFET is exerted by -
a) Channel resistance
b) Size of depletion regions
c) Voltage drop across channel
d) Gate reverse bias
11. The electrical conductivity of metals which is expressed in ohm-1 m-1 is of the order of -
a) 1010
b) 105
c) 10-4
d) 10-6
12. When biased correctly, a zener diode ?
a) acts as a fixed resistance
b) has a constant voltage across it
c) has a constant current passing through it
d) never overheats
13. The current amplification factor adc is given by ?
a) IC/IE
b) IC/IB
c) IB/IC
d) IB/IC
14. Compared to bipolars, FETs have-
a) high input impedance
b) low input impedance
c) same input impedance
d) none
15. The source-drain channel of JFET is -
a) ohmic
b) bilateral
c) unilateral
d) both a and b
16. diac is equivalent to a -
a) Pair of SCRs
b) Pair of four layer SCRs
c) Diode and two resistors
d) Triac width
17. When a sample of N type semiconductor has electron density of 6.25 ? 1011 /cm3 at 300K and if the intrinsic concentration of carriers in this sample is 2.5 ? 1013/cm3 then the hole density will be ?
a) 106/cm3
b) 103/ cm3
c) 1010/ cm3
d) 1012/ cm3
18. The statement 'In any network of linear impedances, the current flowing at any point is equal to the algebraic sum of the currents caused to flow at that point by each of the sources of emf taken separately with all other emf's reduced to zero? represents -
a) Kirchhoff's law
b) Norton's theorem
c) Thevenin's theorem
d) Superposition theorem
19. One of the following modes which has the characteristics of attenuation becoming less as the frequency is increased and is attractive at icrowave frequencies of circular cylindrical wave guides is ?
a) TE1 mode
b) TM01 mode
c) TE01 mode
d) Higher order mode
20. A two-port network is symmetrical if ?
a) z11z22 ? z12z21 = 1
b) h11h22 ? h12h21 = 1
c) AD ? BC = 1
d) y11y22 ? y12y21 = 1
21. For transmission line load matching over a range of frequencies, it is best to use a-
a) balun
b) broad band directional coupler
c) double stub
d) single stub of adjustable position
22. The poles and zeros of a driving point function of a network are simple and interlace on the negative real axis with a pole closest to the origin. It can be realised -
a) by an LC network
b) as an RC driving point impedance
c) as an RC driving point admittance
d) only by an RLC network
23. Poles and zeros of a driving point function of a network are simple and interlace on the jw axis. The network consists of elements ?
a) R and C
b) L and C
c) R and L
d) R, L and C
24. For a two port reciprocal network, the output open circuit voltage divided by the input current is equal to ?
a) B
b) Z12
d) h12
25. In a short electric doublet the radiation properties are so that-
a) The induction field diminishes as the square root of the distance and is only appreciable in the vicinity of the conductor.
b) In the radiation, magnetic field is minimum when the current is maximum.
c) The radiation resistance of a short doublet antenna is extremely high.
d) Mean rate of power through a unit area of spherical sphere surrounding this doublet is proportional to the square of the elemental length, other factors remaining constant.
26. The frequency modulated (FM) radio frequency range is nearly -
a) 250 ?300 MHz
b) 150 ? 200 MHz
c) 90 ? 105 MHz
d) 30-70 MHz
27. In an underground cable the distortion in the transmission of carrier frequency can be eliminated by using -
a) Inductive loading
b) Resistive loading
c) Capacitive loading
d) Shielding
28. The charachteristic impendance of a transmission line with inductance 0.294 mH /m and capacitance 60 pF/m is -
a) 49 W
b) 60 W
c) 70 W
d) 140 W
30. For a quarter wavelength ideal transmission line of characteristic impedance 50 ohms and load impedance 100 ohms, the input impedance will be ?
a) 25W
b) 50W
c) 100W
d) 150W
31. The depth of penetration or skin depth for an electromagnetic field of frequency ?f? in a conductor of resistivity r and permeability m is-
a) inversely proportional to r and f and directly proportional to m
b) directly proportional to r and inversely proportional to f and m
c) directly proportional to f and inversely proportional to r and m
d) inversely proportional to r and m and directly proportional to f
32. When an antenna has a gain of 44dB then assuming that the main beam of the antenna is circular in cross-section the beam width will be -
a) 0.4456 0
b) 1.44560
c) 2.44560
d) 3.44560
33. Lens antennas used for microwaves are usually made of -
a) Polystyrene
b) Glass of low refractive index
c) Paraboloid surfaces
d) Dielectric media having large refractive index
34. One of the following types of instrument which is an electrometer is -
a) Electrodynamometer
b) PMMC
c) Electrostatic
d) Moving iron
35. When an ac current of 5A and dc current of 5A flow simultaneously through a circuit then which of the following statement is true ?
a) An ac ammeter will read less than 10A but more than 5A
b) An ac ammeter will read only 5A
c) A dc ammeter will read 10A
d) A dc ammeter will read zero
36. When Q factor of a circuit is high, then -
a) power factor of the circuit is high
b) impedance of the circuit is high
c) bandwidth is large
d) none of these
37. The resolution of a logic analyser is -
a) the maximum number of input channels
b) the minimum duration of the glitch it can capture
c) it's internal clock period
d) the minimum amplitude of input signal it can display
38. A memoryless system is ?
a) causal
b) not causal
c) nothing can be said
d) none
39. An air capacitor is a ?
a) time variant
b) active device
c) time invariant
d) time invariant and passive device
40. Thermistors are made of -
a) pure metals
b) pure insulators
c) sintered mixtures of metallic oxides
d) pure semiconductor
41. Pirani gauge is used to measure ?
a) very low pressures
b) high pressures
c) pressures in the region of 1 atm
d) fluid flow
42. These circuits converts input power at one frequency to output power at a different frequency through one stage conversion ?
a) AC voltage controllers
b) Cyclo converters
c) Phase controlled rectifiers
d) Inverters
43. In a forward voltage Triggering thyristor changes from ?
a) off state to on state
b) on state to off state
c) on state to on state
d) off state to off state
44. A thyristor, when triggered, will change from forward blocking state to conduction state if its anode to cathode voltage is equal to -
a) peak repetitive off state forward voltage
b) peak working off state forward voltage
c) peak working off state reverse voltage
d) peak non-repetitive off state forward voltage
45. Gate characteristic of a thyristor-
a) is a straight line passing through origin
b) is of the type Vg = a + bIg
c) is a curve between Vg and Ig
d) has a spread between two curves of Vg ? Ig
46. A four quadrant operation requires-
a) two full converters in series
b) two full converters connected back to back
c) two full converters connected in parallel
d) two semi converters connected back to back
47. If for a single phase half bridge inverter, the amplitude of output voltage is Vs and the output power is P, then their corresponding values for a single phase full bridge inverter are ?
a) Vs, P
b) Vs/2, P
c) 2Vs, 2P
d) 2Vs, P
48. In an enhancement type MOSFET the output V-I characteristics has ?
a) only an ohmic region
b) only a saturation region
c) only ohmic region at 10 W voltage value followed by a saturation region at higher voltages
d)an ohmic region at large voltage values preceded by a saturation region at lower voltages
49. The energy gap in a semiconductor -
a) increases with temperature
b) remains constant
c) slightly increase with temperature
d) decrease with temperature
50. In an electronic circuit matching means -
a) connecting a high impedance directly to low impedance
b) selection of components which are compatible
c) transferring maximum amount of signal between different kinds of circuits.
d) RC coupled stages
51. P channel FETs are less superior than N channel FETs because
a) They have higher input impedance
b) They have high switching time
c) They consume less power
d) Mobility of electrons is greater than that of holes
52. Small increase in temperature in the CE connected transistor is the -
a) Increase in ICEO
b) Increase in ac current gain
c) Decrease in ac current gain
d) Increase in output resistance
53. An amplifier has a band width of 20 KHz and a midband gain of 50 without feedback. If a negative feedback of 1% is applied then bandwidth with feedback is -
a) 13. 3 KHz
b) 30KHz
c) 10KHz
d) 40KHz
54. The output of a class B amplifier -
a) is distortion free
b) consists of positive half cycles only
c) is like the output of a full wave rectifier
d) comprises short duration current pulses
55. An amplifier with negative feedback -
a) lowers its lower 3 dB frequency
b) raises its upper 3 dB frequency
c) increases its bandwidth
d) all of the above
56. What changes would be necessary in block C if FM signals are to be received -
a) Block becomes redundant
b) A FM detector would be required
c) A high frequency signal generator
d) An additional local oscillator will be needed
57. The main disadvantage of Diode-Transistor logic (DTL) is its-
a) greater speed
b) slower speed
c) average speed
d) none of the above
58. Time delay Dt in digital signals in an SIS O shift register is given by ?
a) Dt = N ? Fc
b) Dt = N ? 1/Fc
c) Dt = 1/N ? Fc
d) Dt = N ? 1/Fc
59. The output Qn is 1 in a JK flip flop and it does not change when clock pulse is applied) The possible combination of Jn and Kn can be ?
(y denotes don't care)
a) y and 0
b) y and 1
c) 0 and y
d) 1 and y
60. Basic memory cell of dynamic RAM consists of ?
a) a flip flop
b) a transistor acting as a capacitor
c) a transistor
d) a capacitance
61. The 2's complement of 10002 is ?
a) 0111
b) 0101
c) 1000
d) 0001
62. Master slave flip-flop is made up of ?
a) two flip flops connected in series
b) two flip flops connected in parallel
c) a debouncer circuit
d) a-D- latch
63. Number of nybbles making one byte is ?
a) 2
b) 4
c) 8
d) 16
64. The intrinsic impedance of free space-
a) is independent of frequency
b) decreases with increase of frequency
c) increases with increase of frequency
d) varies as square root of frequency
65. A system consists of 12 poles and 2 zeroes. Its high frequency asymptote in its magnitude plot has a slope of -
a) ?200 dB/decade
b) ?240 dB/decade
c) ?230 dB/decade
d) ?320 dB/decade
66. Considering the conditions-
1. High loop gain 2. Less ringing
3. Greater damping 4 Negative dB gain margin
System stability requirements would include
a) 1 and 3
b) 1, 2 and 3
c) 1 and 4
d) 2, 3 and 4
67. In the equatorial plane only Geosychronous satellite are launched because it is the only plane which provides ?
a) 24 hour orbit
b) stationary satellite
c) global communication
d) zero-gravity environs
68. Radio Broadcasting is an example of ?
a) space multiplexing
b) time multiplexing
c) frequency multiplexing
d) none of the above
69. PAM signals can be demodulation by using a ?
a) Low pass filters (LPE) alone
b) A Schmitt trigger followed by a LPF
c) A differentiator followed by a LPF
d) A clipper circuit by a LPF
70. In an FDM receiver channels can be separated by using ?
a) AND gates
b) Band pass
c) differentiation
d) Integration
71. The most common modulation system used for telegraphy is-
a) frequency shift keying
b) two ? tone modulation
c) pulse code modulation
d) single tone modulation
72. Use of varoctor diode in generation of modulated segial be-
a) FM generation only
b) 100AM generation only
c) PM generation only
d) both PM and AM generation
73. In colour picture tube shadow mask is used to-
a) reduce x-ray emission
b) ensure that each beam strikes only its own dots
c) increase screen brightness
d) provide degaussing for the screen
74. The circuit that separates composite video warefore from the sync pulses is-
a) the keyed AGC amplifar
b) a clipper
c) an integrator
d) a sawtooth current
75. Band width of microwaves is-
a) 1GHz -103 GHz
b) 1GHz ?100 GHz
c) 1 GHz ?10 GHz
d) 1 GHz ? 106 GHz
76. In transverse Magnetic mode-
a) no electric line is in direction of propagation
b) no magnetic line is in direction of propagation
c) bath magnetic & electric lines are is direction of propagation
d) neither magnetic nor electric lines in direction of propagation
77. Signal transmission in sky wave propagation is due to ?
a) Reforction of wave
b) Reflection of wave
c) Pierus through Inosphere
d) None
78. According to Barkhausen Criterion Phase shift of signal should be ?
a) 600
b) 900
c) 1800
d) 3600
79. The transmission does not have -
a) Partition noise
b) Flicker noise
c) resistance
d) Short noise
80. Varoctor diode has non linearity of -
a) capacitance
b) Inductance
c) Resistance
d) Is a linear device
81. Noise figure is calculated as ?
a) i/p signal to noise ratio X o/p signal to noise ratio
b) i/p S/N Ratio / O/P S/N Ratio
c) i/p S/N Ratio / O/P S/N Ratio X 100
d) i/p S/N Ratio + O/P S/N Ratio
82. You can determine quickly the effect of adding poles and zeros by ?
a) Nicholas chart
b) Nyquist plot
c) Bode plot
d) Root locus.
83. The polar plot of G(S) = intercepts real axis at w = wo. Then, the real part and wo are given by-
a) ?5, 1
b) ?2.5, 1
c) ?5,0-5
d) ?5, 2
84. Laplace transform F (s) of a function f (E) is given by
The initial and final values of F (t) will be respectively-
a) zero and 1
b) zero and 10
c) 10 and zero
d) 70 and 80
85. A satellite link uses different frequencies for receiving and transmitting in order to ?
a) avoid interference from terrestrial microwave links
b) avoid interference between its powerful transmitted signals and weak in coming signal
c) minimize free-space losses
d) maximize antenna gain
86. The first determining factor in selecting a satellite system is its-
a) EIRP
b) Antenna size
c) Coverage area
d) Antenna gain
87. Equalizing pulses in TV are sent during-
a) horizontal blanking
b) vertical blanking
c) the serrations
d) the horizontal retrace
88. The son seems to have -------- from his father a somewhat gloomy and moody manner-
a) washed
b) inherited
c) admired
d) attempt
60. Basic memory cell of dynamic RAM consists of ?
a) a flip flop
b) a transistor acting as a capacitor
c) a transistor
d) a capacitance
61. The 2's complement of 10002 is ?
a) 0111
b) 0101
c) 1000
d) 0001
62. Master slave flip-flop is made up of ?
a) two flip flops connected in series
b) two flip flops connected in parallel
c) a debouncer circuit
d) a-D- latch
63. Number of nybbles making one byte is ?
a) 2
b) 4
c) 8
d) 16
64. The intrinsic impedance of free space-
a) is independent of frequency
b) decreases with increase of frequency
c) increases with increase of frequency
d) varies as square root of frequency
65. A system consists of 12 poles and 2 zeroes. Its high frequency asymptote in its magnitude plot has a slope of -
a) ?200 dB/decade
b) ?240 dB/decade
c) ?230 dB/decade
d) ?320 dB/decade
66. Considering the conditions-
1. High loop gain 2. Less ringing
3. Greater damping 4 Negative dB gain margin
System stability requirements would include
a) 1 and 3
b) 1, 2 and 3
c) 1 and 4
d) 2, 3 and 4
67. In the equatorial plane only Geosychronous satellite are launched because it is the only plane which provides ?
a) 24 hour orbit
b) stationary satellite
c) global communication
d) zero-gravity environs
68. Radio Broadcasting is an example of ?
a) space multiplexing
b) time multiplexing
c) frequency multiplexing
d) none of the above
69. PAM signals can be demodulation by using a ?
a) Low pass filters (LPE) alone
b) A Schmitt trigger followed by a LPF
c) A differentiator followed by a LPF
d) A clipper circuit by a LPF
70. In an FDM receiver channels can be separated by using ?
a) AND gates
b) Band pass
c) differentiation
d) Integration
71. The most common modulation system used for telegraphy is-
a) frequency shift keying
b) two ? tone modulation
c) pulse code modulation
d) single tone modulation
72. Use of varoctor diode in generation of modulated segial be-
a) FM generation only
b) 100AM generation only
c) PM generation only
d) both PM and AM generation
73. In colour picture tube shadow mask is used to-
a) reduce x-ray emission
b) ensure that each beam strikes only its own dots
c) increase screen brightness
d) provide degaussing for the screen
74. The circuit that separates composite video warefore from the sync pulses is-
a) the keyed AGC amplifar
b) a clipper
c) an integrator
d) a sawtooth current
75. Band width of microwaves is-
a) 1GHz -103 GHz
b) 1GHz ?100 GHz
c) 1 GHz ?10 GHz
d) 1 GHz ? 106 GHz
76. In transverse Magnetic mode-
a) no electric line is in direction of propagation
b) no magnetic line is in direction of propagation
c) bath magnetic & electric lines are is direction of propagation
d) neither magnetic nor electric lines in direction of propagation
77. Signal transmission in sky wave propagation is due to ?
a) Reforction of wave
b) Reflection of wave
c) Pierus through Inosphere
d) None
78. According to Barkhausen Criterion Phase shift of signal should be ?
a) 600
b) 900
c) 1800
d) 3600
79. The transmission does not have -
a) Partition noise
b) Flicker noise
c) resistance
d) Short noise
80. Varoctor diode has non linearity of -
a) capacitance
b) Inductance
c) Resistance
d) Is a linear device
81. Noise figure is calculated as ?
a) i/p signal to noise ratio X o/p signal to noise ratio
b) i/p S/N Ratio / O/P S/N Ratio
c) i/p S/N Ratio / O/P S/N Ratio X 100
d) i/p S/N Ratio + O/P S/N Ratio
82. You can determine quickly the effect of adding poles and zeros by ?
a) Nicholas chart
b) Nyquist plot
c) Bode plot
d) Root locus.
83. The polar plot of G(S) = intercepts real axis at w = wo. Then, the real part and wo are given by-
a) ?5, 1
b) ?2.5, 1
c) ?5,0-5
d) ?5, 2
84. Laplace transform F (s) of a function f (E) is given by
The initial and final values of F (t) will be respectively-
a) zero and 1
b) zero and 10
c) 10 and zero
d) 70 and 80
85. A satellite link uses different frequencies for receiving and transmitting in order to ?
a) avoid interference from terrestrial microwave links
b) avoid interference between its powerful transmitted signals and weak in coming signal
c) minimize free-space losses
d) maximize antenna gain
86. The first determining factor in selecting a satellite system is its-
a) EIRP
b) Antenna size
c) Coverage area
d) Antenna gain
87. Equalizing pulses in TV are sent during-
a) horizontal blanking
b) vertical blanking
c) the serrations
d) the horizontal retrace
88. The son seems to have -------- from his father a somewhat gloomy and moody manner-
a) washed
b) inherited
c) admired
d) attempt
89. Essayist works with words as sculptor with-
a) water
b) stone
c) air
d) hills
90. What is a collection of sheep called ?
a) bunch
b) flock
c) herd
d) comet
91. Join these sentences meaningfully by choosing the correct alternative from the following :
You can buy a book. You can read it.
a) and
b) nor
c) either
d) neither
92. What is the opposite of Asperity ?
a) gentility
b) superiority
c) kindness
d) clarity
93. The Election Commission functions under-
a) Ministry of Home Affairs
b) Ministry of Law
c) Prime Minister's Secretariat
d) None of these
94. Article 352 of Indian Constitution needs to be revoked in case-
a) President's Rule is to be imposed
b) Emergency is declared
c) Services of a Government servant are to be terminated without any enquiry
d) A political party of national level is to be banned
95. Radio-activity was first discovered by-
a) Becquerel
b) Madam Curie
c) Rutherford
d) Jenner
96. Ninth Plan in India ranges from-
a) 1995-2000
b) 1996-2001
c) 1997-2002
d) 1998-2003
97. How much electricity does India propose to generate through nuclear power by the year 2000 AD?
a) 5,000 MW
b) 10,000 MW
c) 15,000 MW
d) 20,000 MW
98. In which year did the fall of Bastille take place?
a) 1769
b) 1789
c) 1889
d) 1869
99. To form a quorum how many members of the Lok Sabha or Rajya Sabha should be present?
a) 1/10th of total membership
b) 1/6th of total membership
c) 1/4th of total membership
d) 1/5th of total membership
100. How may countries are non-permanent members of the Security Council?
a) 6
b) 7
c) 9
d) 10
101. The International Date Line is represented by-
a) 1000 meridian
b) 00 meridian
c) 1800 meridian
d) 900 meridian
102. India's first satellite was launched from-
a) Sriharikota
b) Cape Kennedy
c) Bangalore
d) A Soviet cosmodrome
103. Name the author of the famous book "Politics"-
a) Aristotle
b) Socrates
c) Plato
d) None of them
104. "Guernica" is Picasso's painting on-
a) The Spanish Civil War
b) The American Civil War
c) The French Revolution
d) The Russian Revolution
105. The object of the Supreme Court's Keshvanand Bharati ruling is -
a) To put a limit on Parliament's amendatory powers
b) To give unlimited powers to Parliament to amend the Constitution
c) To give precedence to Directive Principles over Fundamental Rights
d) None of these
106. Which country in July '99 officially announced mastering of indigenously developed neutron bomb technology?
a) N. Korea
b) France
c) India
d) China
107. Shifting cultivation is commonly used in which of the following states?
a) Tamil Nadu
b) Maharashtra
c) Jammu and Kashmir
d) Nagaland
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SAMPLE PAPER 2
ReplyDeleteReactive current through the capacitive load produces -
a) Magnetic field
b) Electric field
c) Supermagnetic field
d) None
One of the following which gives piero-electric effect is -
a) Mu metal
b) PVDF
c) Sapphire
d) Ferrites
PZT piezo- electric materials have -
a) Higher curie temperature
b) Lower curie temperature
c) Absolute temperature
d) None
The residual resistivity of a binary alloy at OK is -
a) The sum of the residual resistivities of the component metals
b) The difference of the residual resistivities of the component metals.
c) The product of the residual resistivities of the component metals
d) Dependent on the concentration of the minor component in the alloy
In active filter circuits, inductances are avoided mainly because they -
a) Are always associated with some resistance
b) Are bulky and unsuitable for miniaturisation
c) Are non-linear in nature
d) Saturate quickly
The depletion layer across a p-n junction lies -
a) mostly in the p-region
b) mostly in the n-region
c) equally to both p and n region
d) entirely in the p-region
The voltage induced in a loop of wire rotating in a strong and steady magnetic field is -
a) pulsating dc
b) dc
c) rectified ac
d) ac
One of the following types of capacitor which is polarized is -
a) Electrolytic
b) Ceramic
c) Paper
d) Mylar
Electric shock is-
a) Always fatal
b) Never fatal
c) Sometimes fatal
d) Always disfiguring
A typical value of filter capacitor for 50 Hz ripple is -
a) 16mF
b) 10F
c) 10mF
d) None
A telephone relay armature is made of material with -
a) High electrical conductivity
b) Low electrical conductivity
c) Negligible conductivity
d) None
Larger the value of filter capacitor -
a) Larger is the peak-peak value of ripple voltage
b) Larger is the peak current in the rectifying diode
c) Longer is the time that current pulse flows through the diode
d) Smaller is the dc voltage across the load
Barrier potential in a P-N junction is caused by -
a) Thermally generated electrons and holes
b) Diffusion of majority carriers across the junction
c) Migration of minority carriers across the junction
d) Flow of drift current
The polarity of V GS for E-only MOSFET is -
a) positive
b) negative
c) zero
d) depends on P or N channel
The following which will serve as a donor impurity in silicon -
a) Boron
b) Indium
c) Germanium
d) Antimony
When bias applied to a vari-cap diode is increased, its capacitance -
a) is decreased
b) is increased
c) remains constant
d) first increases and then decreases.
In case of a bipolar transistor a is -
a) positive and greater than 1
b) positive and less than 1
c) negative and greater than 1
d) negative and less than 1
A BJT is -
a) not very sensitive to radiations
b) very sensitive to radiations.
c) independent of radiations
d) none
An SCR may be considered to be -
a) 2 diodes
b) 3 diodes
c) 4 diodes
d) 5 diodes
For a BJT, under the saturation condition -
a) I C = bI B
b) bIB " name=G20> I C > bI B
c) I C is independent of all other parameters
d) I C < bI B
In modern MOSFET’s the material used for the gate is -
a) High purity silicon
b) High purity silica
c) Heavily doped polycrystalline silicon
d) Epitaxial grown silicon
Find the Norton,s equivalent of the circuit given below -
When the source in the circuit shown is a sinusoidal source then the input voltage is -
a) 10V
b) 5V
c) 27V
d) 24V
The time constant of the network shown in the given figure is given by -
The voltage transfer ratio of two-port networks connected in cascade may be conveniently obtained from the -
a) product of the individual ABCD matrices of the two networks
b) product of voltage transfer ratios of the two individual networks
c) sum of the Z- matrices of the two networks
d) sum of the h – matrices of the two networks
When a network has response with time as shown in fig. then which one of the following diagrams represents the location of the poles of this network ?
For the network shown in the given fig. the ratio is -
An attenuator drops a 10V signal to 50mv in an experiment. The loss in decibels is -
a) –40dB
b) –6dB
c) –55dB
d) –60dB
When the network has 10 nodes and 17 branches then the number of different node pair voltages would be -
a) 7
b) 9
c) 10
d) 45
The circuit shown in the following fig. will act as an ideal current source with respect to terminals A and B when frequency is -
a) zero
b) 1rad/s
c) 4rad/s
d) 16rad/s
When a short vertical grounded antenna is required to radiate at 1MHz and the effective height of the antenna is 30 m then the calculated value of the radiation resistance is -
a) 1.58 W
b) 158 W
c) 15.8 W
d) None of these
Shannon’s law relates -
a) antenna gain to bandwidth
b) frequency to antenna gain
c) antenna gain to transmission losses
d) information carrying capacity to S/N ratio
One of the following modes which has the characteristic of attenceation becoming less as the frequency is increased and is attractive at microwave frequencies of circular cylindrical wave guides is -
a) TE 1 mode
b) TM 01 mode
c) TE 01 mode
d) Higher order mode
For a transmission line, the propogation constant, for a TEM wave travelling in it is given by (Where the symbols have the usual meanings ) -
a) [ (R+j w L) (G+j w c) ]
b) [ R+j w L) (G+j w c)] ½
c) [ (R-j w L) (G + j w c) ] ½
d) [(R-j w L) ( G+j w 2 c) ] 1/3
The advantages of wave guides over co-axial lines would include which of the following features-
1. Easier to use 2. lower power losses
3. Higher operating frequencies possible
a) 1 and 2
b) 1 and 3
c) 2 and 3
d) 1,2 and 3
When a 75 ohm transmission line is to be terminated in two resistive loads R1 and R2 such that the standing pattern in the two cases have the same SWR , then the values of R1 and R2 (in ohms) should be -
a) 250 and 200 respectively
b) 225 and 25 respectively
c) 100 and 150 respectively
d) 50 and 125 respectively
The degenerate modes in a wave guide are characterized by -
a) Same cut off frequencies but different field distribution
b) Same cut off frequencies and same field distributions
c) Different cut off frequencies but same field distributions
d) Different cut off frequencies and different field distributions
A TEM wave impinges obliquely on a dielectric-dielectric boundary with E r1 =2 and E r2 =1, the angle of incidence for total reflection is -
a) 30 0
b) 60 0
c) 45 0
d) 90 0
The radiation pattern of Hertzian dipole in the plane perpendicular to the dipole is a -
a) Null
b) Circle
c) Figure of eight
d) None of the above
40. Permeance is the -
a) square of reluctance
b) reluctance
c) reciprocal of the reluctance
d) cube of the reluctance.
One of the following which is an active transducer is -
a) Photoelectric
b) Photovoltaic
c) Photo-conductive
d) Photo emission
The wein bridge uses only -
a) Inductors
b) Capacitors
c) Resistors
d) Capacitors and Resistors.
The greater the value of Q -
a) higher will be the bandwidth of the resonant circuit.
b) smaller will be the bandwidth of the resonant circuit.
c) nothing can be said)
d) none.
The most serious source of error in a) c) bridge measurement is -
a) eddy currents
b) leakage currents
c) residual imperfectness
d) stray fields.
Moving iron instruments -
a) have a linear scale
b) do not have a linear scale
c) both a and b)
d) none.
If accuracy is the main consideration, which one of the following voltmeters should one select -
a) 100 v ; 2 mA
b) 100 v ; 100 ohm/volt
c) 100 v ; 1mA
d) 10,000 v ; 10 mA
In dc tacho generators used for measurement of speed of a shaft, frequent calibration has to be done because -
a) the contacts wear off
b) the strength of permanent magnet decreases with age
c) the armature current produces heating effect
d) there is back emf.
Ideal transformer cannot be described by -
a) h parameters
b) ABCD parameters
c) G parameters
d) parameters
Consider the following statements -
A3- phase balanced supply system is connected to a 3 phase unbalanced load) Power supplied to this load can be measured using
1. Two wattmeters
2. One wattmeter
3. Three wattmeters
Which of these statements is/are correct?
a) 1 and 2
b) 1 and 3
c) 2 and 3
d) 3 alone
The function of the reference electrode in a pH meter is to -
a) Produce a constant voltage
b) Provide temperature compensation
c) Provide a constant current
d) Measure average pH value
Match the column A (Devices) with column B (Characteristics) and select the correct answer by using the codes given below the column -
Column A Column B
A) BJT 1. Voltage controlled negative resistance
B) MOSFET 2. High current gain
C) Tunnel diode 3. Voltage regulation
D) Zener diode 4. High input impedance
Codes :
A B C D
a) 1 4 2 3
b) 2 4 1 3
c) 2 3 1 4
d) 1 3 2 4
A thyristor during forward blocking state is associated with.-
a) large current , low voltage.
b) low current , large voltage.
c) medium current , large voltage
d) low current, medium voltage.
In controlled rectifiers, the nature of load current i.e. whether load current is continuous or discontinuous -
a) does not depend on type of load and firing angle delay
b) depends both on the type of load and firing angle delay
c) depends only on the type of load)
d) depends only on the firing angle delay.
A single phase voltage controller feeds power to a resistance of 10 W . The source voltage is 200 V rms. For a firing angle of 90 0 , the rms value of thyristor current in amperes is -
a) 20
b) 15
c) 10
d) 5
In the performance of single phase and three phase full converters the effect of source inductance is to
a) reduce the ripples in the load current -
b) make discontinuous current as continuous
c) reduce the output voltage
d) increase the load voltage.
The cycloconverters (CCs) require natural or forced commutation as under -
a) natural commutation in both step up and step down CCs
b) forced commutation in both step up and step down CCs
c) forced commutation in step up CCs
d) forced commutation in step down CCs
Power transistors are more commonly of -
a) silicon npn type.
b) silicon pnp type.
c) silicon nnp type.
d) silicon npp type.
C is a -
a) Middle level language
b) High level language
c) Low level language
d) None of above
What will be output of program
main ( )
{ int i ;
print f ("Enter value of i");
scant ("%d", & i);
if ( i = 5 )
print f ("you entered 5");
else
print f ("you entered %d", i ); }
if user entered 100 then
a) 5
b) 100
c) 1005
d) None
(7F) 16 + (BA) 16 = (?)16-
a) 481
b) 139
c) –481
d) –139
Two’s complement of 3 bit nonzero linory number is some or original number is all bits accepts-
a) MSB are zeros
b) LSB are zeros
c) MSB are ones
d) LSB are ones.
The schematic circuits of RTL NOR gate is-
Transistors with high frequency have -
a) Thick base
b) Thin base
c) Some other feature
d) None of the above
Telephone traffic is specified in terms of -
a) Average waiting time
b) Grade of service
c) Peak waiting time
d) Erlangs
In a Hartley oscillator -
a) Necessary phase relation is obtained by connecting grid and plate electrodes to the opposite ends of the tuned circuit.
b) The mutual inductance must have the appropriate polarity.
c) Both grid circuit and plate tuned circuit offer inductive reactance
d) None of the above
The condenser C is charged in a bootstrap sweep generator -
a) Linearly but the discharge is non linear
b) Non linearly but the discharge is linear
c) Linearly and the discharge is linear
d) Non linearly and the discharge is non linear
In an audio amplifier audio signals become garbled and hence difficult to understand when an ac input current is large enough to drive the output to -
a) saturation only
b) Cut off only
c) Either saturation or cut off
d) A value off the load line
Five 1 bit registers are referred as -
a) Flags
b) Slags
c) Tags
d) None of the above
Next binary number after 0,1, 10, 11 is -
a) 12
b) 101
c) 100
d) 110
Identify coincidence logic circuit in the following –
a) b)
c) d)
The output analog voltage Vo is given by -
If an inverter is placed at the input to an SR flip flop, the result is -
a) T flip flop
b) D flip flop
c) JK flip flop
d) BCD decade counter
See the Root locus diagram of a system and the following statements :-
1. The open loop system is a second order system.
2. The system is over damped for
3. The system is absolutely stable for all value of R.
Which of these statements are correct?
a) 1, 2, & 3
b) 1 and 3
c) 2 and 3
d) 1 and 2
For the transfer function G(S)H(S) = the phase cross over frequency is -
a) 0.5 rad/sec
b) 0.707 rad/sec
c) 1.732 rad/sec
d) 2 rad/sec
If the open loop transfer function of the system is G(S) H(S) =
then a closed loop pole will be located at S = -12 wher the value of K is -
a) 4355
b) 5760
c) 9600
d) 9862
Considering the following open loop transfer function -
The correct sequence of these systems in increasing order of the time taken for the unit step response to settle is –
a) 1, 2, 3
b) 3, 1, 2
c) 2, 3, 1
d) 3, 2, 1.
Considering unit feed back control system in the given figure, the ratio of time constant of closed loop response to open loop response will be -
a) 1: 1
b) 2 :1
c) 3 : 2
d) 2 : 3
Angle subtended by earth at geostationary communication satellite is -
a) 17.34 0
b) 51.4 0
c) 120 0
d) 60 0
For data transmission phase modulation is commonly used because -
a) Phase can be varied from +180 0 to -180 0
b) It is resistant to the effects of noise.
c) Demodulation is very easy
d) It gives highest data rates that can be transmitted over a given channel.
Several channels are interleaved and then transmitted together is known as –
a) Frequency division multiplex
b) Time division multiplex
c) A group
d) A super group
Identify the wrong statement-
The radar cross section of a target -
a) Depends on the frequency used
b) May be reduced by special coating of the target
c) Depends on the aspect of a target, if this is non spherical
d) Is equal to the actual cross-sectional area for small targets.
Considering following parameters -
1. Loss in the media) 2. Permeability of the media) 3. Frequency of the wave 4. Velocity of the wave. Which of these parameters are responsible for the change of phase of a propagating electromagnetic wave?
a) 1, 2, and 3
b) 2, 3 and 4
c) 1, 3 and 4
d) 1 and 4
In super heterodyne receivers double spotting is caused by -
a) poor front-end rejection
b) misalignment of receiver
c) detuning of one or more IF stages.
d) non functioning of AGC
The number of lines per field in the United States TV system is -
a) 262 1/2
b) 525
c) 30
d) 60
In a TV receiver the color killer -
a) cuts off the chroma stages during monochrome receivers.
b) ensures that no color is transmitted to monochrome receivers
c) prevents color overloading
d) makes sure that the color burst is not mistaken for sync pulses, by cutting off reception during the back porch.
The nominal capacitance of a coaxial RF cable is of 40 pF/m and the characteristic impedance of 50 W . The inductance of the cable is-
a) 1 m H/m
b) 10 m H/m
c) 0.1 m H/m
d) 0.01 m H/m
Transmission of wave through Dominant mode is -
a) distortion less transmission
b) generates undesirable harmonic distortion
c) having loss of power
d) None of above.
Lower the standing wave ratio (SWR) -
a) Greater mismatch error
b) Lower mismatch error
c) No effect on matching
d) Moderate mismatch error
In klyrtron oscillator for getting wide range of oscillations resonators should be -
a) Critically coupled
b) Under coupled
c) Over coupled
d) No coupling required
The critical frequency is always -
a) Lower than maximum usable frequency
b) Equal to maximum usable frequency
c) Higher than maximum usable frequency
d) None of above
The PIN diode based on -
a) Nonlinear resistance
b) Nonlinear reactance
c) Negative resistance
d) Controllable impedence
Which antenna having circular polarization -
a) Horn antenna
b) Lens antenna
c) Helical antenna
d) Discone antenna
The i/p S/N ratio of system is 50 and the o/p S/N ratio is 5 the noise figure is -
a) 250
b) 55
c) 10
d) 45
In the 8085 mP, the RST 6 instruction transfers the program execution to the following location -
a) 30 H
b) 24 H
c) 48 H
d) 60 H
In instruction cycle first operation is -
a) Memory read
b) Address read
c) Opcode fetch
d) Data read
CMP instruction comes under group -
a) Data transfer
b) Branching operations
c) Machine control operation
d) Logical operations.
In which logic operation does not effect any flags -
a) ANA B
b) ORA B
c) XRI A2H
d) CMA
What happen when CALL instruction executed -
a) Data retrieved from stock to register
b) Data from register saved on the stock.
c) 16 bit address of instruction saved on stock
d) 16 bit address from stock retrieved)
The mark status of mark able interrupts is defined according to content of -
a) stack pointer.
b) HL register .
c) Program counter
d) Accumulator
The decoder is a logic ckt that -
a) Amplifies the current or power at i/p.
b) Identifies each combination of the signals present at i/p
c) Provides appropriate code as o/p for each i/p signal
d) Both b & c)
The young man was quickly promoted when his employers how --------------- he was -
a) indigent
b) indifferent
c) assiduous
d) cursory.
As letter is alphabet so zodiac is -
a) almanac
b) beacon
c) sign
d) signal.
What is the correct meaning of prudish.?
a) careful
b) fast
c) God
d) brave
Pick out the odd matching with reference to number -
a) woman – women.
b) hair – hairs
c) child – children.
d) foot – feet.
Choose the phrase that is most nearly similiar in meaning to the word given below-
Abut is
a) Stimulate
b) Grasp
c) Oppose
d) Adjoin
The highest mountain peak in Indian Territory is -
a) Mount Everest
b) Kanchenjunga
c) Nanda Devi
d) Mount Kailash
German silver is an alloy comprising -
a) Copper, Nickel and Zinc
b) Silver, copper and Zinc
c) Silver Nickel and Zinc
d) Nickel, Zinc and Lead
Mughal Emperor Bahadur Shah Zafar’s mausoleum is in -
a) Delhi
b) Lahore
c) Yangon
d) Agra
On which date the World Trade Centre in New York and Pentagon in Washington d)C was attacked by terrorist -
a) 12 September 2001
b) 11 September 2001
c) 11 July 2001
d) 20 December 2001
India defeats South Africa in the finals of the inaugural champions challenge Hockey Tournament in Kualalumpur by -
a) 4-2
b) 2-0
c) 3-2
d) 2-1
Which planets in the solar system are known as ‘Inferior Planets’ -
a) Earth and Mars
b) Earth and Mercury
c) Mars and Mercury
d) Mercury and Venus.
The largest Stupa in Southern India is at -
a) Nellore
b) Amravati
c) Tanjore
d) Kozhikode
The new chairman and Managing Director of Industrial Finance Corporaton of India (IFCI) is -
a) Mr. Vishwanath Prasad Singh
b) Mr. Jitendra Patil
c) Mr. Ragh
d) Mr. Shubhash chand Jain
Which one is the latest among rock-cut temples?
a) Ajanta
b) Ellora
c) Elephanta
d) All originated in the same period)
Number of organisations government ban in Jammu and Kashmir and the North East under the new ordinance ‘POTO’ is -
a) 20
b) 21
c) 22
d) 23
In bed of which river does Badrinath shrine stand?
a) Ganga
b) Mandakini
c) Alakananda
d) Bhagirathi
The nerve endings for the sense of sight are located in the part of the eye called the -
a) Cornea
b) Sclera
c) Iris
d) Retina
Fundamental duties were introduced in the constitution by the -
a) 40 th Amendment
b) 42 nd Amendment
c) 43 rd Amendment
d) 44 th Amendment
The Khalsa Panth was founded by -
a) Guru Hargovind
b) Guru Nanak Dev
c) Guru Tegh Bahadur
d) Guru Govind singh
Number of countries involved in international fleet review hosted by India is -
a) 27
b) 28
c) 29
d) 30
SAMPLE PAPER 3:
ReplyDeleteAt a frequency below the resonant frequency parallel circuit is -
a) Inductive
b) Capacitive
c) Resistive
d) None
Which of the following are piezo-electric substances-
a) Barium titanate
b) Lead titanate
c) Lead zirconate
d) All the above
The resolution of a logic analyser is -
a) The maximum number of input channels
b) The minimum duration of the glitch it can capture
c) The internal clock period
d) The minimum amplitude of input signal it can display
In a P-type semiconductor, the conductivity due to holes (=s p ) is equal to (e=charge of hole, m p = hole mobility, P = hole concentration)-
a)
b)
c) P.e. mp
d)
When a small amount of Cu is added to a Ni conductor, then the –
a) Resistivity of Ni will decrease at all temperatures because Cu is better conductor than Ni
b) Residual resistivity of Ni at low temperatures will increase as Cu atoms acts as defect centers
c) Resistivity of Ni will increase at all temperatures as Cu destroys the periodicity of Ni and acts as defects
d) Resistivity of Ni remains unaltered as Cu atoms give the same numbers of free electrons as Ni atoms
A coil would behave as -
a) An inductor at high frequencies
b) A capacitor at very low frequencies
c) A capacitor at very high frequencies
d) A resonator at high frequencies
The law that induced emf and current always oppose the cause producing them was discovered by -
a) Maxwell
b) Faraday
c) Lenz
d) Fleming
A ,trimmer, capacitor is a variable capacitor used for -
a) ,Tunning up, a radio for best sensitivity
b) Tunning a radio to different stations
c) Changing the original capacitance by several hundred Pico farads
d) Eliminating whistling in a transistor radio
In panel wiring, solid wire is preferred to standard wire because it -
a) Can carry more current
b) Can be shaped better
c) Uses less chopper
d) Has better insulation
FET,s have similar properties to –
a) PNP transistors
b) NPN transistors
c) Thermionic valves
d) Unijunction transistors
The semiconductor strain gauge has gauge factor -
a) 2
b) 10
c) 100
d) 1000
AE 139 is a-
a) Tunnel diode
b) Germanium power transistor
c) Photoconductive cell
d) Silicon diode
When a zener diode is used in a power supply its function is to maintain a constant -
a) Output voltage
b) Input voltage
c) Output current irrespective of the load resistance
d) supply current
The value of g for a transistor in saturation is -
a) 0
b) 0.5
c) very near unity
d) 0.25
A DE MOSFET differs from a JFET in the sense that it has no –
a) channel
b) gate
c) P-N junction
d) substrate
The gating pulse is removed after firing an SCR than the current in the SCR will –
a) Remain the same
b) Immediately fall to zero
c) Rise up
d) Rise a little and then fall to zero
In the fabrication of an integrated circuit, the advantages of ion implantation over diffusion doping are that –
a) Point imperfections are not produced
b) Shallow doping is not possible
c) It is a low temperature process
d) Previous steps in fabrication are affected
The alternate mode of a dual trace oscilloscope can be used for displaying –
a) Any two waveforms
b) Two waveforms of relatively high frequency
c) Two waveforms of relatively low frequency
d) One low frequency and one high frequency waveform
Attenuator is a –
a) pure resistance network producing a constant attenuation
b) pure resistance network producing a variable attenuation at variable frequencies
c) pure resistance producing a constant attenuation at all frequencies
d) pure resistance producing a constant attenuation at low frequencies
The equivalent circuit of the following circuit is –
For the lattice type attenuator shown in the given figure, the characteristic impedance R is –
Thevenin,s equivalent circuit of the network shown in the given figure, between terminals T 1 and T 2 is –
One of the following combinations of open circuit voltage and Thevenins equivalent resistance which represents the Thevenins equivalent of the circuit shown in the given fig. is –
a) 1V, 10 W
b) 1V, 1k W
c) 1mV, 1k W
d) 1mV, 10 W
In the following circuit, the effective resistance faced by the voltage source is –
a) 1 W
b) 2 W
c) 3 W
d) 3.3 W
The equivalent circuit of a resistor is shown in the given fig. The resistor will be non-inductive if –
One of the following which is a cut set of the graph shown in fig. is –
a) 1, 2, 3 and 4
b) 2, 3, 4 and 6
c) 1, 4, 5 and 6
d) 1, 3, 4 and 5
For which value of R the following circuit will deliver maximum to the terminals a and b is –
In a coaxial cable, braided copper is used as a -
a) Conductor
b) Shield
c) Dielectric
d) Jacket
When the transmission loss for a 3 GHz microwave system over a certain distance is 130 dB and if the frequency is now doubled then the transmission loss will be –
a) 136 dB
b) 133 dB
c) 127 dB
d) 139 dB
When two equal positive point charges are placed along X- axis at X1 and –X1 respectively then the electric field vector at a point P on the positive Y-axis will be directed -
a) In the +x direction
b) In the –x direction
c) In the +y direction
d) In the –y direction
With reference to the given figure, the signal picked up by the receiving antenna can be increased by increasing-
a) h e only
b) h r only
c) both h e and h r
d) neither h e nor h r
Which of the following antennas are frequency independent ?
1. Folded dipole
2. Half wave dipole
3. Parabolic reflector
4. Helical antenna
a) 2 and 4
b) 3 and 4
c) 1,3 and 4
d) 1,2 and 3
The reading of digital multimeter are –
a) very difficult
b) confusing
c) convenient
d) none
One of the following which does not have the same units as the others –
Shaft encoder is used for the measurement of –
a) angular position
b) linear position
c) linear velocity
d) linear acceleration.
The materials used in switches, brushes and relays for electrical contact must possess –
a) high thermal conductivity and high melting point.
b) low thermal conductivity and low melting point.
c) high thermal conductivity and low melting point.
d) low thermal conductivity and high melting point.
Capacitive transducer is superior to inductive type for the measurement of displacement because of –
a) absence of non-linearity
b) high frequency response
c) small size
d) high accuracy
When a RLC series circuit has R=1ohm, L=1H and C = 1F then the damping ratio on the circuit will be-
a) more than unity
b) unity
c) 0.5
d) zero
The sensitivity of an electromagnetic digital flow meter can be increased by increasing –
a) the circumferential width of rotor teeth
b) the radial depth of rotor teeth
c) the thickness of rotor teeth
d) the number of teeth
A moving iron instrument –
a) is an unpolarised meter
b) has not a fixed coil
c) both a and b
d) none
A linear displacement transducer of the digital type generally uses –
a) straight binary code
b) BCD
c) Gray code
d) hexadecimal code
The output open circuit voltage divided by the input current for a two port reciprocal network is equal to-
a) B
b) Z 12
c) 1/y 12
d) h 12
The ac bridge shown in the given figure if balanced is Z 1 = 100 Ð30 0 Z 2 = 150Ð0 0 , Z 3 = 250 Ð 40 0 and Z 4 is equal to –
a) 375Ð70 0
b) 375Ð-70 0
c) 150Ð0 0
d) 150 Ð20 0
The given figure represents the variation of electric field E –
a) Due to a spherical volume charge Q = Q 1 + Q 2
b) Due to two concentric shells of charge Q 1 and Q 2 uniformly distributed over spheres of radii R 1 and R 2
c) Due to two point charges Q 1 and Q 2 located at any two points ,r,
d) In a single spherical shell of charges Q uniformly distributed Q = Q 1 + Q 2
In a SCR anode current flows over a narrow regain near the gate during-
a) delay time t r
b) rise time t r and spread time to
c) t d and t 0
d) t d and t r
For a 3-phase six-pulse diode rectifier, the average output voltage in terms of maximum value of line voltage Vm is
In an inverter with fundamental ouctput frequency of 50 Hz, if third harmonic is eliminated, then frequencies of other components in the output voltage wave in Hz would be-
a) 250, 350, 450, high frequencies
b) 50, 250, 350, 450
c) 50, 250, 350, 550
d) 50, 100, 200, 250.
Number of SCRs in a 3 phase full converter working during overlap is-
a) 1 from positive group 1 from negative group
b) 2 from positive group 1 from negative group
c) 1 from positive group 2 from negative group
d) 2 from positive group 2 from negative group
For a 3 phase bridge inverter in 180 0 conduction mode. In the given fig the sequence of SCR conduction in the first two steps beginning with the initiation of thyristor is-
a) 6, 1, 2, and 2, 3, 1
b) 2,3,1 and 3,4,5
c) 3,4,5 and 5,6,1
d) 5,6,1 and 6,1,2
For the lattice type atten uator shown in the given figure, the characteristic impedance Rv is-
The plate efficiency of a class C amplifier is high because-
a) A resonant circuit is used as load)
b) The plate current flows when the instantaneous plate voltage is low.
c) The plate current flows only when grid is driven positive.
d) None of the above.
The low impedance of a dynamic loud speaker is a result of -
a) a large field magnet
b) the few turns of the voice coil
c) a large paper cone with big loud speakers
d) None of the above
The value of I CBO in a silicon transistor of b = 49 is 20 na) The value of I CEO for a temperature rise of 18 0 C would be-
a) 8mA
b) 160 nA
c) 1 mA
d) 7.84 mA
A certain percentage of negative feedback does not yield a fixed reduction in gain because it depends on-
a) Transistor configuration
b) Ambient temperature
c) Initial value of gain
d) Leakage current of the transistor
Crossover distortion occurs in --- amplifiers-
a) Push pull
b) Class A
c) Class B
d) Class AB
The power gain of an amplifier is 80 db) The half power frequency f 1 and f 2 are the frequency where gain has fallen to ---dB-
a) 40
b) 77
c) 0
d) 80/ Ö 2
In the given fig the overall voltage gain in the amplifier is -
a) Zero
b) 1
c) 1000
d) 100000
A two stage amplifier is required to have an upper cut off frequency of 2MHz and a lower cut off frequency 30Hz. The upper and lower cut off frequencies of individual stage are approximately-
a) 4MHz, 60Hz
b) 3MHz, 20Hz
c) 3MHz, 60Hz
d) 4MHz, 20Hz
Number of possible states in a circuit with n- FLIPFLOPS is-
a) N n
b) 3 n
c) 10 n
d) 2 n
In a digital voltmeter the largest number that can be read is –
a) 0999
b) 1999
c) 2999
d) 9999
The complement of the Boolean expression is-
The binary division 11000 2 ¸ 100 2 gives –
a) 110
b) 1100
c) 11
d) 101
Time required by TTL circuit to switch from 0 to 1 or 1 to 0 is about –
a) 10 m s
b) 10 ns
c) 100 m s
d) 50 ns
Identify the wrong statement ?
a) 11100 2 – 10001 2 = 00101 2
b) 15E 16 = 350 10
c) 81 10 = 101001 2
d) 37.4 8 = 111 111.100
Type of radar used to eliminate clutter in navigational application is –
a) Monopulse radar
b) MTl radar
c) Tracking radar
d) pulse radar
Asynchronous sequential circuits are seldom designed to operate in the pulse mode because –
a) the amplitude of input pulses in a pulse mode is very critical
b) the duralion of the input pulses in a pulse mode is very critical
c) fundamental mode asynchronous circuit is cheaper than pulse mode asynchronous circuit
d) fundamental mode asynchronous circuit has a higher speed of operation than the pulse mode asynchronous circuit.
Identity the transferred electron device-
a) BARITT diode
b) IMPATT diode
c) Gunn diode
d) Step recovery diode
In a closed loop system the loop transfer function is given by
The angle of departure of the root locus at S = -1+ J is-
a) Zero
b ) 90 0
c) -90 0
d) -180 0
The transfer function of a plant is
For a step input it is required that the response settles to within 2% of its final value. The plant setting time is –
a) 20 sec
b) 40 sec
c) 35 sec
d) 45 sec
The transfer function and states in a linear feedback system shown in given fig. are respectively –
a) strictly stable and not stable
b) strictly stable and stable
c) not strictly stable and stable
d) not stable and not stable.
What is the steady state-error corresponding to a unit step input if the magnitude plot for a transfer function is shown in figure
Mark the correct effect in respect of addition of a pole to the system loop transfer function?
1. The root locus is pulled to the right.
2. The system response becomes slower.
3. The steady state error increases.
of these statements-
a) 1 and 2 are correct
b) 1, 2 and 3 are correct
c) 2 and 3 are correct
d) 1 and 3 are correct
In a feedback control system the polar plot of the open-loop transfer function intersects the real axis at - 2. The gain margin of the system is -
a) –5 dB
b) 0 dB
c) 6 dB
d) 40 dB
The unity feedback system for K is
the imaginary axis is-
a) 2
b) 4
c) 6
d) 48
The constant M loci plot is symmetrical width respect to-
a) real axis and imaginary axis
b) M =1 straight line and the real axis
c) M =1 straight line and the imaginary axis
d) M = 1 straight line and the imaginary axis
Identify the wrong statement-
a) Attenuation of satellite signals gain and varies almost inversely with the angle of elevation.
b) At present4/6 GHz Geostationary satellites are being parked in Geosynchronous orbits at least 10 0 apart.
c) The distance between satellite and earth station varies slightly with angle of elevation.
d) The angle of elevation depends on latitude of the earth station and the difference in longitude between earth station and the satellite.
The Voltage Vo of the given circuit is-
a) 5V
b) 3.1 V
c) 2.5 V
d) Zero
78. An antenna has 40 antenna resistance and 60 W radiation resistances. The efficiency of the antenna is -
a) 30%
b) 40%
c) 50%
d) 60%
79. The blind speed of an MTl radar can be avoided by changing the-
a) Carrier frequency
b) Pulse repetition frequency
c) Antenna rotation rate
d) Transmitted power
Interlacing used in television is for-
a) produce the illusion of motion.
b) ensures that all the lines on the screen are scanned, not merely the alternate ones.
c) simplify the vertical sync pulse train
d) avoid flicker
The best system for accurate tracking if the target cross section is changing is-
a) lobe switching
b) sequential lobing
c) conical scanning
d) monopulse
In a single stage differential amplifier, the output effect voltage is basically dependent on the mismatch of-
a) V BE , I B and b
b) V BE and I B
c) I B and b
d) V BE and b
Antenna elevation angle at the ground station for satellite communication is always kept above 5 0 to-
a) Minimise the sky noise temperature
b) Reduce the effect of oxygen and water vapor absorption on the antenna noise temperature
c) Minimise the slant range
d) Increase the visibility of the satellite
In Hybrid wave-
a) Both electric and magnetic fields are purely transverse to direction of propagation of wave
b) Only electric field is purely transverse to direction of propagation of wave
c) Only magnetic field is purely transverse to direction of propagation of wave
d) Neither electric nor magnetic fields are transverse to direction of propagation of the wave
Balometer technique is used to measure –
a) Frequency
b) Low power
c) Attenuation
d) Phase shift
In fast switching circuits we use –
a) Klystron tube
b) Tunnel diode
c) Magnetron tube
d) PIN diode
PIN diode is used as –
a) Low noise mixer
b) Microwave detector
c) Balance mixer
d) Phase shifter
A periodic fluctuation of current passing through n type GaAS specimen when applied voltage exceeds critical value-
a) Gauss’s law
b) Faraday’s law
c) GUNN effect
d) Doppler effect
LOS distance can be increased by –
a) Increasing height of transmitting antenna
b) Increasing height of receiving antenna
c) Increasing height of bath
d) LOS distance can not be increased
Which fading produces serious distortion of modulated signal-
a) Selective
b) Polorisation
c) Interference
d) Slow fading
8085 mP is a processor of -
a) 8 bit
b) 10 bit
c) 32 bit
d) None
The Bit position of AC flog in flog register is-
a) D 2
b) D 4
c) D 6
d) D 7
In which arithmatic operation CY flog do not affect even if result is larger than 8 bit-
a) INR B
b) ADD A, B
c) SUB A, B
d) None
A stock means-
a) an 8 bit register in microprocessor
b) a 16 bit memory address in memory
c) a 16 bit register in microprocessor.
d) a set of memory location in memory reserved for storing information temporarily.
RIM instruction-
a) checks pending interupts
b) sets the interupt mask
c) resets the RST interupt
d) none of above
A signal generated by microprocessor to provide timing of various operation is transmited through-
a) address bus.
b) data bus
c) control bus
d) in buit signal no need to transmit
On execution of RAL-
a) Each bit is shifted right to the adjacent position bit D o becomes D y
b) Each bit is shifted right to adjacent position bit D o becomes the carry bit and carry bit is shifted into D T
c) Each bit is shifted to adjacent left position. Bit D T becomes D o
d) Each bit is shifted to the adjacent left postion. Bit D T becomes the carry bit and the carry bit is shifted into D o
A frequency divider can be designed with help of-
a) Monostable
b) Bistable
c) Astable
d) Quasistable
The not allowed condition for NAND gate SR FF is-
a) S = 0 R = 0
b) S = 0 R = 1
c) S = 1 R = 0
d) S = 1 R = 1
In IC resistors are formed from p-type semiconductor are –
a) thin film
b) thick film
c) hybrid
d) monolithic
Give the tense of the following sentence-
He walked to the garden.
a) Present
b) Past
c) Future
d) None
You may go there if you want to. Here, the modal auxiliary ,may, indicates-
a) obligation
b) politeness
c) possibility
d) request
What type of a sentence is this?
His findings were imroved and built apon.
a) Simple
b) Comound
c) Complex
d) None of the above
1 The manager is usually strict but in Madhav,s case he decided to be-
a) direct
b) fair
c) excused
d) lenient
Find the word which is wrongly spelt-
a) possession
b) ocassion
c) profession
d) procession
“Dow Jones” is -
a) Name of the national museum in London
b) Bridge over River Thames
c) New York Stock Index
d) New Olympic champion in cycling
The term “Ashes” is associated with-
a) Hockey
b) Cricket
c) soccer
d) None of these
“Kathakali” dance is connected with-
a) Kerala
b) Rajasthan
c) Uttar Predesh
d) Tamil nadu
Among the following Miss India Universe 2001 is-
a) Ms Sara corner
b) Ms Maheshwari Thiagarajan
c) Ms Celina Jetley
d) None of the these
Maharashtra Bhusan Award for the year 2000 – 2001 by the state government goes to -
a) Sanjay Manjrekar
b) Vinod Kambli
c) Sachin Tendulkar
d) Praveen Sharma
Who was Sworn in as the chief Justice of India-
a) Mr. S. Krishnaswamy
b) Mr.A.K. Mehra
c) Mr. J.K. Naidu
d) Mr. S.P. Bharucha
Which one of the following tennis competitions is not included in GRAND SLAM?
a) Wimbeldon
b) U.S open
c) French open
d) Australian open
The first Korean to win the Japan open badminton tournament is -
a) Lee Hyun – II
b) Marleen Renders
c) Shang Pee
d) Emma Yan
India launched first satellite by the name-
a) Bhaskara
b) Aryabhatt
c) INSAT
d) APPLE
. Which state in India is called the “garden of spices”?
a) Karnataka
b) Kerala
c) Assam
d) Tamil Nadu
. The new CEO and the president of the Infosys Technology is –
a) N. R. Narayan Murth
b) Nandan Nilekani
c) SD Shibulal
d) M. Subbarao
The President of India can nominate to the Rajya Sabh-
a) 6 members
b) 9 members
c) 12 members
d) 15 members
King of Nepal is-
a) Prince Gyanendra
b) Prince Dipendra
c) Prince Birendra
d) Prince Devendra
The famous paper which gandhigi edited to propagate his ideas-
a) Khadi
b) Swadeshi
c) Harijan
d) Satyagraha
The length of the pitch in the cricket is-
a) 22 meters
b) 25 yards
c) 50 feet
d) 22 yards
SAMPLE PAPER 4
ReplyDeleteWhen a piece of copper and another of germanium are cooled from room temperature to 80 0 K then the
resistance of -
a) Each of them increases
b) Each of them decreases
c) Copper increases and germanium decreases
d) Copper decreases and germanium increases
When a signal of 10 mV at 75 MHz is to be measured then which of the following instrument can be used -
a) VTVM
b) Cathode ray oscilloscope
c) Moving iron voltmeter
d) Digital multimeter
When a sample of germanium and silicon having same impurity density are kept at room temperature then –
a) Both will have equal value of resistivity
b) Both will have equal value negative resistivity
c) Resistivity of germanium will be higher than that of silicon
d) Resistivity of silicon will be higher than that of germanium
When an RC driving point impedance function has zeros at s= -2 and s=-5 then the admissible poles for the function would be –
a) s = 0; s = -6
b) s = 0; s = -3
c) s = 0; s = -1
d) s = -3; s = -4
5. For the n-type semiconductor with n = Np and p = , the hole concentration will fall below the intrinsic value because some of the holes –
a) drop back to acceptor impurity states
b) drop to donor impurity states
c) Virtually leave the crystal
d) recombine with the electrons
The location of lighting arrestor is –
a) Near the transformer
b) Near the circuit breaker
c) Away from the transformer
d) None
Time constant of an RC circuit increases if the value of the resistance is –
a) Increased
b) Decreased
c) Neither a nor b
d) Both a and b
Telemetering is a method of –
a) Counting pulses sent over long distances
b) Transmitting pictures from one place to another
c) Transmitting information concerning a process over a distance
d) None
When the gauge factor of a strain gauge is 2, stress is 1050 kg/cm 2 , Y = 2.1´ 10 6 kg/cm 2 and R is
100 ohms then the value of DR will be –
a) 2W
b) 3W
c) 4W
d) 1W
As the drain voltage is increased for a junction FET in the pinch off region then the drain current –
a) Becomes zero
b) Abruptly decreases
c) Abruptly increases
d) Remains constant
11. One of the following, which is not a transducer in the true sense, is –
a) Thermocouple
b) Piezoelectric pick up
c) Photo-Voltaic cell
d) LCD
When a transistor is required to match a 100W signal source with a high impedance output circuit then the connection that would be used is –
a) Common base
b) Common collector
c) Common emitter
d) Emitter follower
In a JFET gates are always –
a) forward biased
b) reverse biased
c) unbiased
d) none
The main factor which differentiate a DE MOSFET from an E only MOSFET is the absence of –
a) insulated gate
b) electrons
c) channel
d) P-N junction
An SCR conducts appreciable current when –
a) Anode and gate are both negative with respect to cathode
b) Anode and gate are both positive with respect to cathode
c) Anode is negative and gate is positive with respect to cathode
d) Gate is negative and anode is positive with respect to cathode
Silicon is not suitable for fabrication of light emitting diodes because it is -
a) An indirect band gap semiconductor
b) A direct band gap semiconductor
c) A wide band gap semiconductor
d) A narrow band gap semiconductor
An average responding rectifier type electronic ac voltmeter has its scale calibrated in terms of the rms value of a sine wave, when a square wave voltage of peak magnitude 100V is measured using this voltmeter then the reading indicated by the meter, will be –
a) 111V
b) 100V
c) 90.09V
d) 70.7V
When a four terminal T network is inserted between a source and load resistance as shown in figure then the resistance seen by the source remain the same with or without the four terminal block when R is –
a) 5 W
b) 10 W
c) 15 W
d) 20 W
19. In the ac bridge shown in the given figure, the value of R x and C x at balance will be –
Which one of the following conditions for Z parameters would hold for a two port network containing linear bilateral passive circuit elements –
a) Z 11 = Z 22
b) Z 12 Z 21 = Z 11 Z 22
c) Z 11 Z 12 = Z 22 Z 21
d) Z 12 = Z 21
When the transmission parameters of the following network are A = C = 1, B = 2 and D = 3 then the value of Z in is –
c) 3 W
d) 4 W
The value of G 12 or for the circuit shown in the fig. is –
The two port network of the fig. shown has open circuit impedance parameters given by matrix –
In the circuit shown, the switch closes at t = 0. The voltage across 4 m F capacitor in ideal condition changes to –
a) 0
b) 16V
c) 15V
d) 24V
While calculating R th , constant current sources in the circuit are –
a) replaced by opens
b) replaced by ,shorts,
c) treated in parallel with other voltage sources
d) converted into equivalent voltage sources
Maxwell,s loop current method of solving electrical networks –
a) uses branch currents
b) utilizes kirchhoff,s voltage law
c) is confined to single-loop circuits
d) is a network reduction method
A transmission line of characteristic impedance Z 0 = 50 ohms, phase velocity V p = 2 x 10 8 m/s and length l = 1m is terminated by a load Z L = ( 30 – j 40 ) ohms. The input impedance of the line for a frequency of 100 MHz will be
a) (30 + j40 ) ohms
b) ( 30 – j40 ) ohms
c) (50 + j40 ) ohms
d) (50 – j40 ) ohms
For an elliptically polarized wave incident on the interface of a dielectric at the Brewster angle then the reflected wave will be-
a) Elliptically polarized
b) Linearly polarized
c) Right circularly polarized
d) Left circularly polarized
A yagi antenna has a driven antenna-
a) Only
b) With a reflector
c) With one or more directors
d) With a reflector and one or more directors
The number of lobes on each side of a 3 l resonant antenna is –
a) 3
b) 6
c) 2
d) 1
The electric field intensity of a Hertizian dipole at a remote point varies as-
Radiation resistance of a half wave folded dipole is -
a) 72 W
b) 144 W
c) 288 W
d) 216 W
When a carrier wave is modulated at 100% it’s power is increased by -
a) 100%
b) 150 %
c) 50%
d) 0%
On a clear sky day, the atmospheric radio noise is strongest -
a) During morning hours
b) Around mid-day
c) During nights
d) In the afternoon
TV broadcasting system in India is as per CCIR -
a) System B
b) System I
c) System M
d) System X
For the safety measurement of the internal resistance of a 25-0-25 m A meter, a laboratory multimeter whose sensitivity is equal to –
a) 1k ohm/volt can be used
b) 10 k ohm/volt can be used
c) 100 k ohm/volt can be used
d) 200 k ohm/volt can be used
In order to measure moisture in wood the most suitable method is –
a) Electrical conduction
b) Electrical – capacitive
c) Absorption of radiation
d) Equilirium- moisture vs humidity
The flow rate of elctrically conducting liquid without any suspended practicle cannot be measured by –
a) turbine flow meters
b) electromagnetic flow meters
c) ultrasonic flow meters
d) thermistor based heat loss flow meters
The most useful transducer for displacement sensing with excellent sensitivity, linearity and resolution is –
a) an incremental encoder
b) an abosolute encoder
c) LVDT
d) a strain gauge
When variable reluctance type techometer has 150 teeth on the rotor & the counter records 13,500 pulses per second then the rotational speed will be–
a) 4800 rpm
b) 5400 rpm
c) 6000 rpm
d) 7200 rpm.
41. On a voltage scale, zero dB m in a 600-ohm system could refer to –
a) 1.732 V
b) 1.0 V
c) 0.7746 V
d) 0.5V
One of the following devices which is required in addition in order to measure pressure using LVDT is-
a) strain gauge
b) pitot tube
c) Bourden tube
d) Rotameter
It is required to measure temperature in the range of 1300 0 C to 1500 0 c) The most suitable thermocouple to be used as a transducer would be –
a) chromel - constantan
b) Iron - constantan
c) chromel - alumel
d) platinum- rhodium
In a CSI if frequency of output voltage is f Hz, then frequency of input voltage to CSI is-
a) f
b) 2 f
c) f/2
d) 3 f
Identify the type of chipper in the given circuit
a) Type A chopper
b) Type B chopper
c) Type C chopper
d) Type D chopper
Maximum value of charging resistance in an UJT is associated with-
a) peak point
b) valley point
c) any point between peak and valley
d) after the valley point
Thyristor A has rated gate current of 2A and thyristor B a rated gate current of 100 mA-
a) A is a GTO and B is a conventional SCR
b) B is a GTO and A is a conventional SCR
c) B may operate as a transistor
d) none of the above
In a 3 phase full converter, the output voltage during overlap is equal to-
a) zero
b) source voltage
c) source voltage minus the inductance drop
d) average value of the conducting phase voltages
Mark old the correct statement for Cycloconverters-
a) step-down Cycloconverter (CC) works on natural commutation
b) step up CC requires no forced commutation
c) load commutated CC works on line commutation
d) none of the above
In a 3 phase full converter if load current is I and ripple free, then average thyristor current is-
a)
b)
c)
d)
In the RF amplifier stage cascade (CE-CB) amplifier is used because it gives-
a) Large voltage gain
b) Low output impedance
c) Large isolation between the input and the output
d) None of the above
Silicon diode is less suited for low voltage rectifier operation because-
a) it can withstand high temperature
b) ensures low PIV of the diodes
c) ensures lower values of capacitance in the filter
d) reduces ripple content
An amplifier of class A is that in which -
a) Base is biased to cut – off
b) I c flows most of the time
c) I e flows all the time
d) V c often raises to V cc
A transistor is in active region when-
a) I B = b I C
b) I C = b I B
c) I C =I E
d) I C =I B
For coupling purposes in RF amplifier a buffer amplifier is used because it provides-
a) Maximum loading and minimum mismatch
b) Minimum loading and minimum mismatch
c) Maximum loading and maximum mismatch
d) Minimum loading and maximum mismatch
A transistor has CE parameter as h ie = 10k W , h re =20 x 10 -4 , h se = 100, h oe = 25 m s. The h ib for this transistor will be-
a) 100 W
b) 99.01 W
c) 5m W
d) 101kW
An FM radio receiver is tuned to a 90.6 MHz broadcast station. It will receive an image frequency of -
a) 110 MHz
b) 112 Hz
c) 114 MHz
d) 120 MHz
In the given fig R L is shorted out, then V CE will become-
a) OV
b) V CC – I B R B
c) Equal to V CC
d) None of the above
See the circuit shown and choose the correct option –
a) Only red will glow
b) Only green will glow
c) Both red and green will glow
d) Neither red nor green will glow
A dc to dc converter having an efficiency of 80% is delivering 16W to a load) If the converter is generating an output of 200V from an input source of 20V, then the current drawn from the source will be –
a) 0.1A
b) 0.5A
c) 1.0A
d) 10.0A
A transistor is operated as a non-saturated switch to eliminate –
a) storage time
b) turn – off time
c) turn – on time
d) delay time
. The output Y of the circuit in the given figure is –
a) (A + B)C + DE
b) AB + C(D + E)
c) (A + B)C + D + E
d) (AB + C) . DE
Rotors used in a two-phase ac servomotor is –
a) solid iron motor
b) squirrel cage rotor
c) drag cup rotor
d) both b and c
Major advantage of TWT over a klystron lies in its –
a) higher bandwidth
b) higher output
c) higher frequency
d) higher gain
The op-map circuit shown in the given figure can be used for –
a) addition
b) subtraction
c) both addition and subtraction
d) multiplication
The Boolean expression for the shaded area in the given Venn diagram is –
A lag compensator is basically a –
a) high pass filter
b) band pass filter
c) low pass filter
d) band elimination filter
Transfer function T (S) of the system in the given fig is-
The overall transfer function for a unity feedback system is
Mark the correct statement regarding this system
1. Position error constant k p for the system is 4
2. The system type one.
3. The velocity error constant k v for the system is finite.
Select the correct answer using the codes given below-
Codes
a) 1,2 and 3
b) 1 and 2
c) 2 and 3
d) 1 and 3
If the rotor’s resistance and reactance are respectively R and X 1 its length and diameter are L and D for two phase a) c) servomotor, then-
In a PID controlles the transfer function G(s) is-
Transfer function can be approximated by the system-
The transfer function of an amplifier is given by
The high 3 db frequency of an amplifier will be approximately-
a) 5850 kHz
b) 585 kHz
c) 5850 Hz
d) 585 Hz
An open loop transfer function is given by
Its – loci will be-
. The output signals amplitudes for 1,s and 0,s in an ADM transmission systems are –
a) Fixed and the repetition rate is also fixed
b) Fixed but the repetition rate is variable
c) Variable and the repetition rate is also variable
d) Variable but the repetition rate is fixed
Microwave link repeaters are typically 50km apart –
a) Because of atmospheric attenuation
b) Because of Output tube power limitations
c) Because of the earth,s curvature
d) To ensure that the applied ac voltage is not excessive
. The amplifier inserted at intervals to amplify the signal and compensate for transmission loss on the cable are called-
a) line amplifier
b) equalizing amplifiers
c) compradors
d) repeaters.
Diversity reception in used to-
a) increase receiver sensitivity
b) improve receiver selectivity
c) overcome degrading effect of fading
d) overcome degrading effect of receiver detuning
Mark out transferred electron device in the following-
a) BARITT dived
b) IMPATT dived
c) Gunn divde
d) Step recovery diode
In the output of a normal monochrome receiver video detector voltages, which are not found, are -
a) syne
b) video
c) sweep
d) sound
The HV anode supply for the picture tube of TV receiver is generated in the-
a) mains transformer
b) vertical output stage
c) horizontal output stage
d) horizontal deflection oscillator
In antenna measurements using two aperture antennas of dimensions D 1 and D 2 , minimum separation between the two should be (x is free space wavelength of radiation uses)
. The frquency range for satellite broad casting is –
a) 30 MHz – 300MHz
b) 30 MHz – 3 GHz
c) 3 GHz – 30 GHz
d) 30 GHz – 300 GHz
Iris is used to –
a) Over come power loss
b) Over come bending effect
c) Over come mismatch error
d) Over come twist effect
In schotty barrier diode current flows because of –
a) Majority carriers
b) Minority carriers
c) Majority and minority carriers
d) None
. Which antennas are used in microwave communication –
a) long wave antennas
b) Rhombic antennas
c) Parabolaidal antennas
d) All of above
Among translator & time of sight system capacity –
a) Of translator is more
b) Of line of sight is more
c) Having equal capacity
d) No relation such as
No of T-state required for memory read or write operation-
a) 2
b) 3
c) 4
d) 6
89. In data transfer operation which flag get affected)-
a) 3140 flog.
b) carry flog
c) sign flog.
d) none
In flowchart which figure represents process like subroutine-
.
The storage and retrieval of data on stacks should follow sequence-
a) last in first out
b) first in first out
c) random in random out
d) none
. While executing program microprocessor checks INTR line clearing-
a) each instruction
b) after interval of two instruction
c) after a subroutine
d) at the end of program.
93. In which error check technique of data communication 2,s complement of all bytes of data is transmitted with data-
a) Even parity
b) odd parity
c) check scans
d) cyclic redundancy
. Program execution hierarchy decides which operator-
a) is most important
b) is used first
c) is fastest
d) operators on largest number
. (375) 10 = (----) 8
a) 550
b) 557
c) 567
d) 577
To obtain 2048 8 memory using 128 8 memory chip how many IC required-
a) 2
b) 4
c) 8
d) 16
A Decimal no. 17 can be converted in binary, the binary no. will be.-
a) 10001
b) 01110
c) 00111
d) 11100
Is the Universal logic gate-
a) AND
b) OR
c) NAND
d) X-OR
A monostable state in multivibrator means-
a) which returns itself to its single stable state
b) the state used only once in circuit
c) the state of circuit can not get changed
d) the state of circuit always changing
For designing binary counter which flip flop is preferred -
a) T FF
b) SR FF
c) D FF
d) JKFF
His handwriting was not ----- so I could not read his note –
a) attractive
b) eligible
c) clear
d) legible
They started to ----- people into the theatre only at six -
a) enter
b) admit
c) follow
d) accept
I told him to buy things that are lasting (Give the appropriate synonym of the underlined word).
a) ending
b) ordinary
c) durable
d) cheap
Give the word which is most opposite in meaning of the word ,evident,-
a) doubtful
b) unimportant
c) disagreed
d) understood
I expressed by disagreement ------ him on that issue-
a) between
b) with
c) about
d) for
‘Sugarbowl’ of the world is -
a) India
b) Cuba
c) Brazil
d) USA
Palk strait separates-
a) India and Srilanka
b) India and Burma
c) Britain and France
d) Malaysia and Sumatra
The minimum number of atoms in a molecule of an element are-
a) 1
b) 5
c) 2
d) 10
Tides in the sea are caused by-
a) Effect of sun
b) Effect of moon
c) combined effect of moon and sun
d) Gravitational, centrifugal and centripetal forces
. The Bar council of India decided to close over law colleges across the country for their failure to maintain minimum teaching standard) There number is
a) 140
b) 200
c) 150
d) 100
Aswan Dam is located in-
a) Egypt
b) Libya
c) Sudan
d) Iran
Ghana Birds sanctuary is in the state of -
a) Rajasthan
b) Madhya Pradesh
c) Uttar Pradesh
d) Maharashtra
Dry ice is-
a) Frozen carbon monoxide
b) Frozen carbon dioxide
c) Frozen ammonia
d) None of these
East flower river of India is -
a) Cauvery
b) sone
c) Narmada
d) Tapti
The total length of the great wall of China is –
a) 1,400 miles
b) 1,500 miles
c) 1,300 miles
d) 1,400 miles
Deficiency of vitamin C may result in-
a) beriberi
b) night blindness
c) dermatitis
d) Scurvy
Bharat Shah a film financer was granted bail by Supreme Court after a period of –
a) 11 months
b) 2 years
c) 18 months
d) 15 months
Indian local time is based on-
a) 80 0 E longitude
b) E longitude
c) 110 0 E longitude
d) 25 0 E longitude
The two days Shiv Shena Mahashivir of 2002 started at Shirdi on –
a) 9 th April 2002
b) 10 th April 2002
c) 8 th April 2002
d) 11 th April 2002
Which one is a good preservative of food?
a) Spirit
b) Formaldehyde
c) Sugar
d) None of the above
SAMPLE PAPER 5
ReplyDeleteFor an abrupt junction varactor diode, the dependence of device capacitance (c) on applied reverse bias (V) is given by –
a.) C a V 1/3
b.) C a V -1/3
c.) C a V 1/2
d.) C a V -1/2
The main purpose of plating the high frequency inductors and capacitors with silver is to
a.) Reduce their dc resistances
b.) Reduce their ac resistances
c. ) Increase their ac resistance
d.) Increases their dc resistance
In a semiconductor the measurement of Hall coefficient provides information on the –
a. ) Sign and mass of charge carriers
b.) Mass and concentration of charge carriers
c.) Sign of charge carries alone
d. ) Sign and concentration of charge carriers
In electrical machines, laminated cores are used with a view to reduce –
a.) Hysteresis loss
b.) Eddy current loss
c. ) Magnetic loss
d.) None
In a cable the voltage stress is maximum at the surface of the –
a.) Sheath
b.) conductor
c.) Insulator
d.) None
The series equivalent resistance value in case of a lossy capacitor will be –
a.) Very small
b.) Small
c.) Large
d.) None
One of the following material which has negative temperature coefficient of resistance is-
a. ) Brass
b. ) Copper
c. ) Aluminium
d.) Carbon
The input impedance of a CRD is nearly –
a. ) zero
b.) around 10 ohms
c. ) around 100 ohms
d.) around one mega ohm
9. In order to convert intrinsic semiconductors into extrinsic ones, the level of doping required is about –
a.) 1 : 10 3
b.) 1 : 1
c.) 1 : 10 8
d. ) 1 : 10 5
One of the following, which is not a transducer in the true sense, is –
a. ) Thermocouple
b.) Piezoelectric pick up
c. ) Photo-Voltaic cell
d. ) LCD
The threshold voltage of a MOSFET can be lowered by –
a. ) Using a thinner gate oxide
b. ) Increasing the substrate concentration
c. ) Both a & b
d.) None
The resistance of a metallic wire would –
a.) Increase as the operating frequency increases.
b.) Decrease as the operating frequency increases
c.) Remain unaffected on increasing the operating frequency
d.) None
One of the following statements which is correct regarding the two transistor model of the p-n-p-n four layer device is –
a. ) It explains only the turn ON portion of the device characteristic.
b. ) It explains only the turn OFF portion of the device characteristics.
c.) It explains only the negative region portion of the device characteristics.
d. ) It explains all the regions of the device characteristics.
The gain-band width product of a junction transistor is affected to a maximum extent by –
a.) Base collector parasitic capacitance
b.) Base collector space charge layer capacitance
c.) Base collector space charge layer capacitance
d. ) Base emitter diffusion capacitance
The modulation of effective base width by collector voltage is known as early effect, hence reverse collector voltage –
a.) Increases both alpha and beta
b.) Decreases both alpha and beta
c.) Increases alpha but decreases beta
d.) Decreases beta but increase alpha.
One of the following theorem which is the manifestation of the law of conservation of energy is –
a. ) Tellegen,s theorem
b.) Reciprocity theorem
c. ) Thevenin,s theorem
d. ) Norton,s theorem
The network shown in the fig. represents a :
a.) band-pass filter
b) low-pass filter
c.) high-pass filter
d.) band-stop filter
For the circuit shown in the fig. the current I is –
a.) indeterminable due to inadequate data
b) zero
c.) 4A
d.) 8A
1When the p network of figure – I and T-network of figure – II are equivalent then the values of R 1 , R 2 and R 3 will be respectively –
a.) 9 W , 6 W and 6 W
b) 6 W , 6 W and 9 W
c.) 9 W , 6 W and 9 W
d.) 6 W , 9 W and 6 W
When two identical 3v, 1 W batteries are connected in parallel with like polarity to like then the Norton equivalent circuit of this combination is –
a) 3A, 0.5 W
b.) 6A, 1 W
c.) 3A, 1 W
d.) 6A, 0.5 W
The dominate mode in a waveguide is characterized by-
a.) Longest cut off wavelength
b.) Shortest cut off wavelength
c.) Infinite attenuation
d.) Zero attenuation
22. The antenna most commonly used for TV broadcasting in the UHF band is
a.) Turnstile antenna
b.) Dipole antenna
c. ) Yagi antenna
d.) Rhombic antenna
The crossed dipoles in turnstile antenna are excited with voltage such that the phase shift between the voltage is-
a.) Zero
b.) 45 0
c.) 90 0
d.) 180 0
The channel required for FM telemetry is-
a.) The same as that required for AM telemetry
b.) Smaller than the required for AM telemetry
c. ) 100 Times that required for AM telemetry
d. ) 10 times that required for AM telemetry
When the input impedance of loss-less transmission line is 100 ohms when terminated in a short circuit and 64 ohms when terminated in an open circuit, then the input impedance of the line is
a. ) 80 W
b. ) 164 W
c.) 36 W
Evanescent mode attenuation in a waveguide depends upon the-
a.) 32 GHz
b.) 8 GHz
Out of the following the one that mostly reflects the high frequency radio waves is-
a.) D
b) . E
c.) F 1
d.) F 2
One of the following which is not a wide band antenna is-
a.) Marconi
b.) Helical
c.) Rhombic
d. ) Folded dipole
The power carried by an electromagnetic wave traveling in free space changes with distance ‘d’ in proportion to-
a.) d
b.) 1/d
c.) 1/d 2
d.) d 2
In a FM receiver, the channel bandwidth is around-
a.) 10 KHz
b.) 20 KHz
c.) 75 KHz
d.) 200 KHz
When the power of transmitter is doubled, then the field strength at a point will go up by-
a.) 2 dB
b.) 6 dB
c.) 3 dB
d.) None
In any transmitting antenna system, efficiency primarily depends upon-
a.) Ohmic losses of various conductors
b.) Radiation resistance
c.) Ground conductivity
d.) Atmospheric conditions
The signal to quantisation noise ratio in a PCM system depends upon –
a.) sampling rate
b.) number of quantisation levels
c.) massage signal band width
d.) size of the transmission system.
Q. is –
a.) directly proportional to damping factor.
b.) inversely proportional to damping factor.
c.) directly proportional to the square of damping factor.
d.) directly proportional to the cube of damping factor.
A dry cell is a –
a.) time variant only
b.) active device only
c.) time-varying and active device
d. ) none.
A digital frequency counter can be converted to a DVM by addition of a stage of suitable –
a.) voltage controlled oscillator
b.) D/A converter to it
c.) power amplifier to it
d. ) operational amplifier to it.
A 0 to 200 V dc moving coil voltmeter has a guaranteed accuracy of 0.75 % of full scale reading. The voltage measured by instrument is 100V. The limiting error is –
a. ) 3%
b.) 2%
c. ) 1.5%
d. ) 0.75%
. The dynamic characteristics of capacitive transducers are similar to those of a –
a. ) low pass filter
b.) high pass filter
c. ) notch filter
d. ) band stop filter
The temperature coefficient of resistance for a thermistor is –
a.) low and negative
b.) low and positive
c.) high and negative
d. ) high and positive
Which of the following types of transducers can be used for measurement of an angular position is –
a. ) Circular potentiometer
b.) Synchro
c.) E-pick off
d.) both a and b
A 300V full-scale deflection voltmeter has an accuracy of ± 2 %. When it reads 222V. The actual voltage –
a.) Lies between 217.56V and 226.44V
b.) Lies between 217.4V and 226.6V
c. ) Lies between 216V and 228V
d. ) Is exactly 222V
In a thyristor, ratio of latching current to holding current is-
a.) 0.4
b.) 1.0
c.) 2.5
d.) 6.0
In a single-phase full converter bridge the average output voltage is given by-
a. b.
c. d.
A 3 phase semi converter can work as-
a.) converter for a = 0 0 to 180 0
b.) converter for a = 0 0 to 90 0
c.) inverter for a = 90 0 to 180 0
d.) inverter for a = 0 0 to 90 0
In the given arrangement A-3 the circuit is initially in steady stale with thyristor T off. At the moment thyristor T is turned on the thyristor current is –
a.) 2 A
b.) 22 A
c.) 40A
d.) 42 A
In dc choppers for chopping period T, the out put voltage can be controlled by FM by varying-
a) T keeping T on constant
b.) T off keeping T constant
c.) T keeping T off constant
d.) none of the above
In synchronized UJT friggering of an SCR, voltage Vo across capacitor reaches UJT threshhold voltage thrice in each half cycle so that there are three firing pulses during each half cycle. The firing angle of the SCR can be controlled.
a.) once in each half cycle.
b.) thrice in each half cycle
c.) twice in each half cycle.
d. ) four times in each half cycle.
When a series LC circuit is connected to a dc supply of V volt through a thyristor, then the peak current through thyristor is-
In a single phase voltage controller with RL load, ac output power can be controlled if
a) and (load phase angle) and conduction angle " name=G49>. firing angle a > and (load phase angle) and conduction angle
b. )
c. )
d. )
Class C amplifier is mainly used as-
a. ) As an RF amplifier
b.) As stereo amplifier
c.) In communication sound equipment
d.) As distortion generator
Parasitic oscillations in amplifiers are caused by-
a. ) Negative feedback
b.) Push-pull operation
c.) Poor interstage coupling
d.) Transistor inter – junction capacitance
The input impedance in a voltage shunt feedback is-
a.) decreased
b.) Increased
c.) Remains unchanged
d. ) None of the above
The signal / noise (S / N) ratio of an amplifier developing an output voltage of 10 v and a noise voltage of 1 mV is ------ dB
a.) 40
b.) 100
c.) -40
d.) 80
The feedback factor ‘BA v ’ is negative for negative feedback-
a.) True
b) . False
c) . May or May not be
d) . None of the above
For sustaining oscillations in a feedback amplifier the loop gain should be-
a. ) Zero
b.) Less than one
c.) Greater than one
d.) None of the above
An operational amplifier has a slew rate of 100 v/ microsecond. For a frequency of 10MHz the maximum value of the sine-wave output voltage will be-
a.) 100 v
b.) 50/ p v
c) .10v
d) .5v
A signal having uniformly distributed amplitude in the interval (-v ,+ v) is to be encoded using PCM with uniform quantization. The signal to quantizing noise ratio is determined by the-
a. ) Dynamic range of the signal
b.) Number of quantizing level
c.) Sampling rate
d) . Power spectrum of signal
For signal amplitude modulated to a depth of 100 % by a sinusoidal signal power is-
a. ) Same as the power of unmodulated carrier
b.) Twice as the power of unmodulated carrier
c. ) 3/2 times the power of unmodulated carrier
d.) 2/3 times the power of unmodulated carrier
Identify the false statement about MOSFET.
It can deplete in-
a.) Depletion mode
b) . Enhancement modes
c.) Depletion and enhancement modes
d. ) Depletion only mode
The process of conversion from an analog signal to digital signal is known as an –
a.) analog to digital conversion
b.) digital to analog conversion
c.) analog to analog conversion
d.) digital to digital conversion
TTL circuits are used in main frame computers because of their –
a.) fast operating speed
b.) slow operating speed
c.) medium operating speed
d.) none of the above
When a large number of analog signals is to be converted to digital form, an analog multiplexor is used. The A to D converter suitable in this case will be –
a.) dual slope type
b.) up down counter type
c.) successive approximation type
d.) forward counter type
Identity wrong rule for binary subtraction ?
a.) 0 – 0 = 0
b.) 1 – 0 = 1
c.) 1 – 1 = 0
d. ) 0 – 1 = -1 with borrow of 1
The binary equivalent of 9.375 10 is –
a.) 1001.011 2
b.) 1101.101 2
c.) 1100.011 2
d.) 1111.001 2
In FM if transmission bandwidth is doubled then the SNR is-
a.) Also doubled
b) Improved fourfold
c.) Decreased by one fourth
d.) Unaffected
Main memory are of two kinds –
a.) ROM and RAM
b.) random and sequential
c.) primary and secondary
d.) central and peripheral
The resolution for n bit system D/A converter is –
In a PCM system, the number of quantization level are 16 and the maximum signal frequency is 4KHz. The bit transmission rate is-
a.) 64 K bits / sec
b.) 32 bits / sec
c.) 32 K bits /sec
d) 16K bits /sec
Mark out sop in the following-
The reverse saturation Current I CO in a transistor amplifier-
a. ) doubles for every 10 0 C rise in temperature
b.) doubles for every 5 0 C rise in temperature
c.) doubles for every 1 0 C rise in temperature
d.) increases linearly with temperature
The given circuit is equivalent to –
a.) b.)
c.) d.)
The interface chip used for data transmission between 8086 and a 16-bit ADC is –
a.) 8529
b.) 8251
c.) 8255
d.) 8253
The output signal amplitudes for1,s and 0,s in an ADM transmission system –
a) Fixed and the repetition rate is also fixed
b. ) Fixed but the repetition rate is variable
c.) Variable and the repetition rate is also variable
d.) variable but the repetition rate is fixed
A composite voltage V = 10 sin 100t + 10cos 100t is applied across a series combination of a capacitor of 1/ m F and a resistance of 10 k W . The average power dissipated in the resistance is –
a.) 5mW
b.) 3.5mW
c. ) 4mW
d.) 8mW
Considering a negative feedback system
The closed loop system is stable for
Mark the features of the break away point in the root locus of a closed loop control system with the characteristic equation 1+ KG 1 (s) H 1 (s) = 0
1. It need not always occur only on the real axis.
2. At this point G 1 (s) H 1 (s) = 0
3. At this point
Select the correct answer using codes below.
a.) 1, 2 and 3
b.) 1 and 2
c.) 2 and 3
d.) 1 and 3
Which of the following components can be used as a rotating amplifier in a control system?
1. An amplidyne
2. A separatively excited dc generator
3. A self excited dc generator
4. A sychro
select the correct answer using codes below-
a. ) 3 and 4
b.) 1 and 2
c) . 1, 2 and 3
d.) 1, 2, 3 and 4
In the formation of Routh’s array the situation of a row of zeros indicates that the system-
a.) has symmetrically located roots.
b. ) is not sensitive to variations in gain
c.) is stable
d.) unstable
A 3-port circulator is shown in the figure.
Which one of the following scattering matrices related to this circulator?
In the given figure a signal flow graph is shown. Consider the statements regarding the signal flow graph-
1. There are three forward paths
2. There are three individual loops
3. There are two non touching loops
of these statements-
a.) 1, 2 and 3 are correct
b.) 1 and 2 are correct
c.) 2 and 3 are correct
d.) 1 and 3 are correct
Mark out wrong statement.
Modulation is used to-
a. ) Reduce the bandwidth used
b) . Separate differing transmissions
c.) Ensure that intelligence may be transmitted over long distances
d.) Allow the use of practicable antennas
The best scanning system for tracking if the target has been acquired is-
a.) lobe switching
b.) sequential lobbing
c.) conical scanning
d.) monopulse
The amplification in parametric amplifiers used in microwave communication system is limited by-
a.) type of biasing
b.) cassegranian antenna
c.) pyramidal horn antenna
d. ) dipole antenna
Gating signal is applied to the circuit as shown in the given figure, to switch the field effect transistor. When gating signal isOV, the output voltage V O will be-
a. ) Zero
b.) Sine wave (2Vp-p)
c.) 2Vdc
d.) I/2V
Hamming codes are used for error detection and correction. If the minimum Hamming distance is m, then the number of errors correctable is-
a. ) equal to M
b.) less than M/2
c.) equal to 2 M
d.) greater than M
Mark out a wrong statement for two phase servo motor-
a. ) The rotor diameter is small
b.) The rotor resistance is low
c. ) The applied voltages are seldom balanced
d.) The torque speed characteristic is linear.
The frequency deviation in phase modulation is-
a.) independent of the modulating signal frequency
b.) inversely proportional to the modulating signal frequency
c.) directly proportional to the modulating signal frequency.
d.) inversely proportional to the square root of the modulating frequency.
A telephone channel has bandwidth B of and . It is connected to a Teletype machine having 32 different symbols. The symbols rate required for errorless transmission is nearly-
a. ) 1800 symbol / s
b.) 3000 symbols/s
c.) 5000 symbols/s
d.) 6000 symbols/s
Which power amplifiers has maximum efficiency?
a.) Class A
b) . Class AB
c.) Class B
d.) Class C
Negative resistance characteristics for its operation is used by –
a.) TWT
b) . Klystron
c.) Magnetron
d. ) MASERS
Is a non mark able interrupt-
a. ) RST 7.5
b ) . RST 6.5
c. ) RST 5.5
d. ) TRAP
Instructions in C are of type-
a. ) 2
b. ) 3
c.) 4
d.) 6
In C programming character variable can at a time store-
a.) 1 character
b.) 8 characters
c.) 16 characters
d.) 256 characters
To obtain 16 x 8 memory using 16x4 memory. How many IC required-
a.) 16
b.) 2
c.) 4
d.) 8
In active low logic, the logic I state corresponds to-
a.) high voltage level
b) low voltage level.
c.) negative voltage
d.) ground level.
If JK inputs are tied together, the circuit reduces to-
a.) SR FF
b.) D FF
c) T FF
d.) JK FF
For designing half adder are require-
a.) a NOT gate and a OR gate
b) . a AND gate and a OR gate
c) . two AND gate
d.) a AND gate and a X – OR gate
Portly random and portly cyclic sequential access of memory is in-
a.) magnetic tape
b.) CD ROM
c.) Magnetic Drum
d.) Flopy
A pointer which points the memory address of the current or next instruction is-
a.) Index register
b.) Temp register
c.) Program counter
d.) Stack pointer
For address modification purpose computer uses-
a. ) Temp register
b.) Index register
c.) Stack pointer
d.) Program counter
Let,s go for a walk, . The tag question required for this statement is :
a.) Shall we ?
b.) Should we ?
c.) don,t we?
d.) do we ?
He looked very grave
Which of the following words has the closest meaning to the word underlined.
a.) angry
b) serious.
c.) frightened
d.) upset.
Sharma did not work ----- so his master asked him to leave-
a.) proper
b.) properly
c.) rightly
d) straight
Being punctual is necessary in your job. (Substitute the underlined word without changing its meaning) -
a.) attractive
b.) free from worries
c) . on time
d.) cheerful
Reema said that she had never ----- a book she liked so much.
a.) held upon
b.) saw into
c.) come across
d.) viewed on
The first bullet train is assembled in –
a. ) South Korea
b.) North Korea
c.) Japan
d.) Malaysia
Minister of Parliamentary Affairs and Communications and Information Technology of Government of India is –
a.) Uma Bharati
b.) Pramod Mahajan
c. ) Murli Manohar Joshi
d.) Uma Kashyap
Chairman of the Cricket Board’s Zonal Academics is –
a.) N Venkat Rao
b.) Jag Mohan Dalmia
c.) Chandru Borde
d.) Kapil Dev
Romario matched the career total of retired Zico by-
a.) 830 goals
b.) 835 goals
c.) 834 goals
d.) 831 goals
The best source of Vitamin A is
a.) Lime bean
b.) Carrot
c.) Tomato
d. ) Orange
Titan is the name of the moon related to planet-
a. ) Uranus
b.) Neptune
c. ) Saturn
d. ) There is no such moon
Word Environment Day was observed on-
a.) 5 May 99
b.) 15 May 99
c.) 5 June 99
d. ) 5 July 99
Who wrote ‘Mudrarakshasa”?
a. ) Kautilya
b.) Visakhadatta
c.) Kalhana
d.) Kalidas
Where were the first Asian Games held?
a.) New Delhi
b) . Teheran
c.) Tokyo
d.) Bangkok
Tagore,s Gitanjali is-
a. ) A collection of poems
b. ) A collection of short stories
c. ) A collection of dramas
d.) A novel
In which year did Mahatma Gandhi launched it first non cooperation movement-
a. ) 1917
b.) 1918
c.) 1919
d.) 1920
In how many years is Khumbh Mela held?
a. ) 3
b) . 5
c.) 8
d.) 10
e.) 12
Panchayat polls held in Jammu and Kashmir after the gap of-
a.) 40 years
b.) 20 years
c.) 33 years
d.) 23 years
The hardest part in a tooth is-
a.) Dental tubule
b.) Dentine
c.) Enamel
d.) Pulp
What is ,Pimpri, famous for?
a. ) Chemicals factory
b.) Fertilizer factory
c.) Antibiotics factory
d.) Cement factory
e.) None of these.
SAMPLE PAPER 6:
ReplyDeleteIf the voltage applied across a capacitance is triangular in waveform then the waveform of the current is- a) Triangular
b) Trapezoidal
c)) Sinusoidal
d) Rectangular
One of the following statement which is true for relative dielectric constant is -
a) It is dimensionless
b) It is not equal to unity for vacuum
c)) It’s value for all substances is less than one
d)) None
Pure metals generally have-
a) high conductivity and low temperature coefficient
b) high conductivity and large temperature coefficient
c) low conductivity and zero temperature coefficient
d) low conductivity and high temperature coefficient
For small size, high frequency coils, the most common core material is
a) Air
b) Ferrite
c) Powdered ion
d) Steel
For an abrupt junction Varactor diode, the dependence of device capacitance (C) on applied reverse bias (V) is given by-
a) C a V1/3
b) C a V-1/3
c) C a V1/2
d) C a V-1/2
A superconductor is a-
a) A material showing perfect conductivity and Meissner effect below a critical temperature
b) A conductor having zero resistance
c) A perfect conductor with highest dimagnetic susceptibility
d) A perfect conductor which becomes resistive when the current density through it exceeds a critical value
When a semiconductor based temperature transducer has a temperature coefficient of –2500 mV/0C then this transducer is indeed a-
a) Thermistor
b) Forward biased pn junction diode
c) Reverse biased pn junction diode
d) FET
The location of lightning arrestor is -
a) Near the transformer
b) Near the circuit breaker
c) Away from the transformer
d) None
Time constant of an RC circuit increases if the value of the resistance is -
a) Increased
b) Decreased
c) Neither a nor b
d) Both a and b
Intrinsic semiconductors are those which -
a) Are available locally
b) Are made of the semiconductor material in its purest from
c) Have more electrons than holes
d) Have zero energy gaps
The primary control on drain current in a JFET is exerted by -
a) Channel resistance
b) Size of depletion regions
c) Voltage drop across channel
d) Gate reverse bias
The electrical conductivity of metals which is expressed in ohm-1 m-1 is of the order of -
a) 1010
b) 105
c) 10-4
d) 10-6
When biased correctly, a zener diode –
a) acts as a fixed resistance
b) has a constant voltage across it
c) has a constant current passing through it
d) never overheats
The current amplification factor adc is given by –
a) IC/IE
b) IC/IB
c) IB/IC
d) IB/IC
Compared to bipolars, FETs have-
a) high input impedance
b) low input impedance
c) same input impedance
d) none
The source-drain channel of JFET is -
a) ohmic
b) bilateral
c) unilateral
d) both a and b
A diac is equivalent to a -
a) Pair of SCRs
b) Pair of four layer SCRs
c) Diode and two resistors
d) Triac width
When a sample of N type semiconductor has electron density of 6.25 ´ 1011 /cm3 at 300K and if the intrinsic concentration of carriers in this sample is 2.5 ´ 1013/cm3 then the hole density will be –
a) 106/cm3
b) 103/ cm3
c) 1010/ cm3
d) 1012/ cm3
When the two networks shown in fig. are equivalent with respect to the terminals 1 and 2 at all frequencies then the values of CA, LB, LC and CC will be –
a) 0.5, 0.33, 6, 0.166
b) 0.5, 3, 6, 0.66
c) 0.5, 3, 3, 2
d) 0.5, 3, 6, 0.166
The transmission parameter of the network C when the transmission parameter of the network A and B are and respectively are -
The statement ,In any network of linear impedances, the current flowing at any point is equal to the algebraic sum of the currents caused to flow at that point by each of the sources of emf taken separately with all other emf,s reduced to zero’ represents -
a) Kirchhoff,s law
b) Norton,s theorem
c) Thevenin,s theorem
d) Superposition theorem
One of the following modes which has the characteristics of attenuation becoming less as the frequency is increased and is attractive at icrowave frequencies of circular cylindrical wave guides is –
a) TE1 mode
b) TM01 mode
c) TE01 mode
d) Higher order mode
A two-port network is symmetrical if –
a) z11z22 – z12z21 = 1
b) h11h22 – h12h21 = 1
c) AD – BC = 1
d) y11y22 – y12y21 = 1
For transmission line load matching over a range of frequencies, it is best to use a-
a) balun
b) broad band directional coupler
c) double stub
d) single stub of adjustable position
The poles and zeros of a driving point function of a network are simple and interlace on the negative real axis with a pole closest to the origin. It can be realised -
a) by an LC network
b) as an RC driving point impedance
c) as an RC driving point admittance
d) only by an RLC network
Poles and zeros of a driving point function of a network are simple and interlace on the jw axis. The network consists of elements –
a) R and C
b) L and C
c) R and L
d) R, L and C
For a two port reciprocal network, the output open circuit voltage divided by the input current is equal to –
a) B
b) Z12
d) h12
In a short electric doublet the radiation properties are so that-
a) The induction field diminishes as the square root of the distance and is only appreciable in the vicinity of the conductor.
b) In the radiation, magnetic field is minimum when the current is maximum.
c) The radiation resistance of a short doublet antenna is extremely high.
d) Mean rate of power through a unit area of spherical sphere surrounding this doublet is proportional to the square of the elemental length, other factors remaining constant.
The frequency modulated (FM) radio frequency range is nearly -
a) 250 –300 MHz
b) 150 – 200 MHz
c) 90 – 105 MHz
d) 30-70 MHz
In an underground cable the distortion in the transmission of carrier frequency can be eliminated by using -
a) Inductive loading
b) Resistive loading
c) Capacitive loading
d) Shielding
The charachteristic impendance of a transmission line with inductance 0.294 mH /m and capacitance 60 pF/m is -
a) 49 W
b) 60 W
c) 70 W
d) 140 W
One of the following statements which is not true for a strip line compared to a waveguide is –
a) It can be directly connected to semiconductor microwave devices
b) It is much smaller in size
c) It has a smaller bandwidth
d) Losses are less
For a quarter wavelength ideal transmission line of characteristic impedance 50 ohms and load impedance 100 ohms, the input impedance will be –
a) 25W
b) 50W
c) 100W
d) 150W
The depth of penetration or skin depth for an electromagnetic field of frequency ‘f’ in a conductor of resistivity r and permeability m is-
a) inversely proportional to r and f and directly proportional to m
b) directly proportional to r and inversely proportional to f and m
c) directly proportional to f and inversely proportional to r and m
d) inversely proportional to r and m and directly proportional to f
When an antenna has a gain of 44dB then assuming that the main beam of the antenna is circular in cross-section the beam width will be -
a) 0.4456 0
b) 1.44560
c) 2.44560
d) 3.44560
Lens antennas used for microwaves are usually made of -
a) Polystyrene
b) Glass of low refractive index
c) Paraboloid surfaces
d) Dielectric media having large refractive index
One of the following types of instrument which is an electrometer is -
a) Electrodynamometer
b) PMMC
c) Electrostatic
d) Moving iron
When an ac current of 5A and dc current of 5A flow simultaneously through a circuit then which of the following statement is true ?
a) An ac ammeter will read less than 10A but more than 5A
b) An ac ammeter will read only 5A
c) A dc ammeter will read 10A
d) A dc ammeter will read zero
When Q factor of a circuit is high, then -
a) power factor of the circuit is high
b) impedance of the circuit is high
c) bandwidth is large
d) none of these
The resolution of a logic analyser is -
a) the maximum number of input channels
b) the minimum duration of the glitch it can capture
c) it,s internal clock period
d) the minimum amplitude of input signal it can display
The aperture time of an A to D converter is given by -
A memoryless system is –
a) causal
b) not causal
c) nothing can be said
d) none
An air capacitor is a –
a) time variant
b) active device
c) time invariant
d) time invariant and passive device
Thermistors are made of -
a) pure metals
b) pure insulators
c) sintered mixtures of metallic oxides
d) pure semiconductor
Pirani gauge is used to measure –
a) very low pressures
b) high pressures
c) pressures in the region of 1 atm
d) fluid flow
These circuits converts input power at one frequency to output power at a different frequency through one stage conversion –
a) AC voltage controllers
b) Cyclo converters
c) Phase controlled rectifiers
d) Inverters
In a forward voltage Triggering thyristor changes from –
a) off state to on state
b) on state to off state
c) on state to on state
d) off state to off state
Q factor of a coil in Maxwell bridge is obtained as –
A thyristor, when triggered, will change from forward blocking state to conduction state if its anode to cathode voltage is equal to -
a) peak repetitive off state forward voltage
b) peak working off state forward voltage
c) peak working off state reverse voltage
d) peak non-repetitive off state forward voltage
Gate characteristic of a thyristor-
a) is a straight line passing through origin
b) is of the type Vg = a + bIg
c) is a curve between Vg and Ig
d) has a spread between two curves of Vg – Ig
A four quadrant operation requires-
a) two full converters in series
b) two full converters connected back to back
c) two full converters connected in parallel
d) two semi converters connected back to back
If for a single phase half bridge inverter, the amplitude of output voltage is Vs and the output power is P, then their corresponding values for a single phase full bridge inverter are –
a) Vs, P
b) Vs/2, P
c) 2Vs, 2P
d) 2Vs, P
For critical damping of the resonant circuit consisting of Rd, L, C in series is –
d) none of the above
In an enhancement type MOSFET the output V-I characteristics has –
a) only an ohmic region
b) only a saturation region
c) only ohmic region at 10 W voltage value followed by a saturation region at higher voltages
d)an ohmic region at large voltage values preceded by a saturation region at lower voltages
The energy gap in a semiconductor -
a) increases with temperature
b) remains constant
c) slightly increase with temperature
d) decrease with temperature
In an electronic circuit matching means -
a) connecting a high impedance directly to low impedance
b) selection of components which are compatible
c) transferring maximum amount of signal between different kinds of circuits.
d) RC coupled stages
P channel FETs are less superior than N channel FETs because
a) They have higher input impedance
b) They have high switching time
c) They consume less power
d) Mobility of electrons is greater than that of holes
Small increase in temperature in the CE connected transistor is the -
a) Increase in ICEO
b) Increase in ac current gain
c) Decrease in ac current gain
d) Increase in output resistance
An amplifier has a band width of 20 KHz and a midband gain of 50 without feedback. If a negative feedback of 1% is applied then bandwidth with feedback is -
a) 13. 3 KHz
b) 30KHz
c) 10KHz
d) 40KHz
The output of a class B amplifier -
a) is distortion free
b) consists of positive half cycles only
c) is like the output of a full wave rectifier
d) comprises short duration current pulses
An amplifier with negative feedback -
a) lowers its lower 3 dB frequency
b) raises its upper 3 dB frequency
c) increases its bandwidth
d) all of the above
What changes would be necessary in block C if FM signals are to be received -
a) Block becomes redundant
b) A FM detector would be required
c) A high frequency signal generator
d) An additional local oscillator will be needed
The main disadvantage of Diode-Transistor logic (DTL) is its-
a) greater speed
b) slower speed
c) average speed
d) none of the above
Time delay Dt in digital signals in an SIS O shift register is given by –
a) Dt = N ´ Fc
b) Dt = N ´ 1/Fc
c) Dt = 1/N ´ Fc
d) Dt = N ¸ 1/Fc
The output Qn is 1 in a JK flip flop and it does not change when clock pulse is applied) The possible combination of Jn and Kn can be –
(y denotes don,t care)
a) y and 0
b) y and 1
c) 0 and y
d) 1 and y
Basic memory cell of dynamic RAM consists of –
a) a flip flop
b) a transistor acting as a capacitor
c) a transistor
d) a capacitance
The 2,s complement of 10002 is –
a) 0111
b) 0101
c) 1000
d) 0001
Master slave flip-flop is made up of –
a) two flip flops connected in series
b) two flip flops connected in parallel
c) a debouncer circuit
d) a-D- latch
Number of nybbles making one byte is –
a) 2
b) 4
c) 8
d) 16
The intrinsic impedance of free space-
a) is independent of frequency
b) decreases with increase of frequency
c) increases with increase of frequency
d) varies as square root of frequency
A system consists of 12 poles and 2 zeroes. Its high frequency asymptote in its magnitude plot has a slope of -
a) –200 dB/decade
b) –240 dB/decade
c) –230 dB/decade
d) –320 dB/decade
In a unity feed back control system the open loop transfer function is
The closed loop transfer unit will have pole at –
a) –2, -2
b) –2, -1
c) –2, +j1,-j1
d) –2, 2
In a compensating network the transfer function is of the form If this is a phase log network the value of should be –
a) exactly equal to 0
b) between 0 and 1
c) exactly equal to 1
d) greater than 1
Considering the conditions-
1. High loop gain 2. Less ringing
3. Greater damping 4 Negative dB gain margin
System stability requirements would include
a) 1 and 3
b) 1, 2 and 3
c) 1 and 4
d) 2, 3 and 4
A typical control system is shown.
Assuming the steady state errors is given by
The centre and radius of M of circles are given respectively by
The open –loop transfer function for a unity feedback system is –
what is the steady state error if the input is,
r(t) = (2 + 3t + 4t2) u(t)
a) 0
b) 1
c) 2
d) 3
The sensitivity SGM of a system with the transfer function is given by
In the equatorial plane only Geosychronous satellite are launched because it is the only plane which provides –
a) 24 hour orbit
b) stationary satellite
c) global communication
d) zero-gravity environs
Radio Broadcasting is an example of –
a) space multiplexing
b) time multiplexing
c) frequency multiplexing
d) none of the above
PAM signals can be demodulation by using a –
a) Low pass filters (LPE) alone
b) A Schmitt trigger followed by a LPF
c) A differentiator followed by a LPF
d) A clipper circuit by a LPF
In an FDM receiver channels can be separated by using –
a) AND gates
b) Band pass
c) differentiation
d) Integration
The most common modulation system used for telegraphy is-
a) frequency shift keying
b) two – tone modulation
c) pulse code modulation
d) single tone modulation
Use of varoctor diode in generation of modulated segial be-
a) FM generation only
b) 100AM generation only
c) PM generation only
d) both PM and AM generation
In colour picture tube shadow mask is used to-
a) reduce x-ray emission
b) ensure that each beam strikes only its own dots
c) increase screen brightness
d) provide degaussing for the screen
The circuit that separates composite video warefore from the sync pulses is-
a) the keyed AGC amplifar
b) a clipper
c) an integrator
d) a sawtooth current
Band width of microwaves is-
a) 1GHz -103 GHz
b) 1GHz –100 GHz
c) 1 GHz –10 GHz
d) 1 GHz – 106 GHz
In transverse Magnetic mode-
a) no electric line is in direction of propagation
b) no magnetic line is in direction of propagation
c) bath magnetic & electric lines are is direction of propagation
d) neither magnetic nor electric lines in direction of propagation
Signal transmission in sky wave propagation is due to –
a) Reforction of wave
b) Reflection of wave
c) Pierus through Inosphere
d) None
According to Barkhausen Criterion Phase shift of signal should be –
a) 600
b) 900
c) 1800
d) 3600
The transmission does not have -
a) Partition noise
b) Flicker noise
c) resistance
d) Short noise
Varoctor diode has non linearity of -
a) capacitance
b) Inductance
c) Resistance
d) Is a linear device
Scattering matrix equation for directional coupler is –
a)
b)
c)
d)
Noise figure is calculated as –
a) i/p signal to noise ratio X o/p signal to noise ratio
b) i/p S/N Ratio / O/P S/N Ratio
c) i/p S/N Ratio / O/P S/N Ratio X 100
d) i/p S/N Ratio + O/P S/N Ratio
You can determine quickly the effect of adding poles and zeros by –
a) Nicholas chart
b) Nyquist plot
c) Bode plot
d) Root locus.
The polar plot of G(S) = intercepts real axis at w = wo. Then, the real part and wo are given by-
a) –5, 1
b) –2.5, 1
c) –5,0-5
d) –5, 2
Laplace transform F (s) of a function f (E) is given by
The initial and final values of F (t) will be respectively-
a) zero and 1
b) zero and 10
c) 10 and zero
d) 70 and 80
A satellite link uses different frequencies for receiving and transmitting in order to –
a) avoid interference from terrestrial microwave links
b) avoid interference between its powerful transmitted signals and weak in coming signal
c) minimize free-space losses
d) maximize antenna gain
The first determining factor in selecting a satellite system is its-
a) EIRP
b) Antenna size
c) Coverage area
d) Antenna gain
Equalizing pulses in TV are sent during-
a) horizontal blanking
b) vertical blanking
c) the serrations
d) the horizontal retrace
The son seems to have -------- from his father a somewhat gloomy and moody manner-
a) washed
b) inherited
c) admired
d) attempt
Essayist works with words as sculptor with-
a) water
b) stone
c) air
d) hills
What is a collection of sheep called ?
a) bunch
b) flock
c) herd
d) comet
Join these sentences meaningfully by choosing the correct alternative from the following :
You can buy a book. You can read it.
a) and
b) nor
c) either
d) neither
What is the opposite of Asperity –
a) gentility
b) superiority
c) kindness
d) clarity
The Election Commission functions under-
a) Ministry of Home Affairs
b) Ministry of Law
c) Prime Minister,s Secretariat
d) None of these
Article 352 of Indian Constitution needs to be revoked in case-
a) President,s Rule is to be imposed
b) Emergency is declared
c) Services of a Government servant are to be terminated without any enquiry
d) A political party of national level is to be banned
Radio-activity was first discovered by-
a) Becquerel
b) Madam Curie
c) Rutherford
d) Jenner
Ninth Plan in India ranges from-
a) 1995-2000
b) 1996-2001
c) 1997-2002
d) 1998-2003
How much electricity does India propose to generate through nuclear power by the year 2000 AD?
a) 5,000 MW
b) 10,000 MW
c) 15,000 MW
d) 20,000 MW
In which year did the fall of Bastille take place?
a) 1769
b) 1789
c) 1889
d) 1869
To form a quorum how many members of the Lok Sabha or Rajya Sabha should be present?
a) 1/10th of total membership
b) 1/6th of total membership
c) 1/4th of total membership
d) 1/5th of total membership
How may countries are non-permanent members of the Security Council?
a) 6
b) 7
c) 9
d) 10
The International Date Line is represented by-
a) 1000 meridian
b) 00 meridian
c) 1800 meridian
d) 900 meridian
India,s first satellite was launched from-
a) Sriharikota
b) Cape Kennedy
c) Bangalore
d) A Soviet cosmodrome
Name the author of the famous book "Politics"-
a) Aristotle
b) Socrates
c) Plato
d) None of them
"Guernica" is Picasso,s painting on-
a) The Spanish Civil War
b) The American Civil War
c) The French Revolution
d) The Russian Revolution
The object of the Supreme Court,s Keshvanand Bharati ruling is -
a) To put a limit on Parliament,s amendatory powers
b) To give unlimited powers to Parliament to amend the Constitution
c) To give precedence to Directive Principles over Fundamental Rights
d) None of these
Which country in July ,99 officially announced mastering of indigenously developed neutron bomb technology?
a) N. Korea
b) France
c) India
d) China
Shifting cultivation is commonly used in which of the following states?
a) Tamil Nadu
b) Maharashtra
c) Jammu and Kashmir
d) Nagaland
SAMPLE PAPER 7:
ReplyDeleteOf the following bridges the one which can be used for the measurement of dielectric loss of a capacitor is –
a.) Schering bridge
b..) Heaviside campbell equal ratio voltage
c) Owen bridge
d.) Anderson bridge
LBDT is uses as a –
a). Displacement transducer
b.) Pressure transducer
c.) Temperature
d.) Any of the above
Polarization is a measure of -
a.) Dielectric constant per unit volume.
b. )Voltage gradient to produce electrical breakdown
c.) Product of charge and distance
d.)Excess charge density
Compared to the inductive type of transducer, capacitive transducer is superior for the measurement of displacement because of -
a.)Absence of non-linearity
b.) High frequency response
c.) Small size
d.) High accuracy
An incremental model of a solid state device is one which represents the –
a.) ac property of the device at the desired operating point
b. )dc property of the device at all operating points
c.) Complete ac and dc behaviour of the device at all operating points
d.)ac property of the device at all operating points.
The ac resistance of a forward biased p-n junction diode operating at a bias voltage ,V, and carrying current ‘I’ is –
a. )Zero
b. )a constant value independent of Vand I
c.)
d.
A meter is shielded with a soft iron to –
a. )Prevent damage from rough use
b.) Keep moisture out of movement
c. )Protect meter movement from stray magnetic fields
d.) Achieve all of the above
A capacitor that has been connected across a battery for comparatively long time becomes–
a. )Charged
b.) Discharged
c.) Short - circuited
d.) Defective
The charge on the plates of a capacitor is given by the expression –
a.) Q = VI
b.) Q = IR
c.) Q = CV
d.) Q = IC
Silicon steel used for electrical purposes has silicon percentage of –
a. )0.5
b.) 2.5
c.) 3.4
d). None
The feature of VTM is its –
a. )Low input impedance
b. )Low power consumbtion
c. )The ability to measure wider ranges of voltage and resistances
d). None
In an N-type semiconductor, the position of the fermi level –
a. )Is lower than the centre of the energy gap
b.) Is at the centre of the energy gap
c.)Is higher than the centre of the energy gap
d. )Can be anywhere depending upon the doping concentration
A JFET can operate in –
a.) depletion and enhancement model
b. )depletion mode only
c. )enhancement mode only
d.) neither enhancement nor depletion mode
Consider the following semiconductor diodes –
a. )Germanium diode
b.)Silicon diode
c.) Tunnel diode
d.) Schottky diode
A diode with a PIV of 50V is likely to break down when rectifying 50v ac supply because –
a.) it is made of defective material
b.) it is incorrectly connected to the supply
c.) peak value of ac supply exceeds the PIV value
d. )ac supply is of extremely high frequency.
The set of transistor characteristics that enables a to be determined directly from the slope is –
a.) CE transfer characteristics
b. )CE output characteristics
c.) CB transfer characteristics
d.) CB input characteristics
For an N-channel JFET, the drain voltage has to be –
a.) positive with respect to the source
b.) negative with respect to the source
c.) uncharged with respect to the source
d.)none
The SCR is often employed as a –
a. )Source-controlled switch
b. )Drain-controlled switch
c.) Gate-controlled switch
d) None
An oscilloscope has an input impedance consisting of 1MW and 20pF in parallel. A high impedance probe connected to the input of this oscilloscope has a 10MW series resistance, this 10MW resistance –
a.) Need not be shunted
b.) Should be shunted by a 2pF capacitor
c.) Should be shunted by a 20pF capacitor
d. )Should be shunted by a 200pF capacitor
Compared to silicon, gallium arsenide (GaAs) has –
a. )Easier to grow crystals since the vapour pressure of arsenic is high
b. )Higher optolectronic conversion efficiency
c.) Both a and b
d). None
When the network shown in the fig draw a current I and if the ends ab are shorted, the current drawn would be –
a.) I
b.) I\ 4
c.) 4 I
d.) 2 I
When all the resistances in the circuit are of one ohm each, then the equivalent resistance across the points A and B will be –
a.)1W
b.) 0.5W
c.) 2W
d). 1.5W
Of the following periodic waveforms the one having only odd harmonics of sinusoidal waveform is-
a. )1 and 2
b.) 1 and 3
c. )1 and 4
d. )2 and 4
When in the network shown in the given fig, the switch K is dosed at t = 0 with the capacitor uncharged then the value for at t = 0+ will be –
a. )100 amp./sec.
b. )–100 amp./sec.
c. )1000 amp./sec.
d. )–1000 amp./sec.
For the circuit shown in the given figure, the voltage VAB is –
a. )6V
b.)10V
c. )25V
d. )40V
In the network shown in the given fig. current i = 0 when E = 4V, I = 2A and I = 1A when E = 8V, I = 2A. The Thevenin voltage and the resistance into the terminals AB are –
a. )4V, 2W
b.) 4V, 4W
c.) 8V, 2W
d.) 8V, 4W
The effective resistance between the terminals A and B in the circuit shown in the fig. is –
a.) R
b.) R-1
c.) R/2
d.) 6/11 R
When in a two terminal network, the open circuit voltage measured at the given terminals by an electronic voltmeter is 100V and a short circuit current measured at the same terminals by an ammeter of negligible resistance is 5A then if a resistor of 80W is connected at the same terminal, then the current in the load resistor will be –
a. )1A
b.) 1.25A
c). 6A
d.) 6.25A
If for the network shown in the following fig. the value of Z(s) is then the value of C and R are respectively –
In Faraday’s induction phenomenon, a changing magnetic field is accompanied by an electric field. Which of the following equation or equations represents it-
The electric potential due to an electric dipole of length L at point distance r away from it will be doubled if the -
a. ) Length L of the dipole is doubled
b. ) r is doubled
c. ) r is halved
d ) L is halved
When a particular mode is excited in a waveguide there appears an extra electric component in the direction of propogation . The resulting mode is
a. ) Longitudinal electric
b. ) Transverse electromagnetic
c. ) Transverse magnetic
d ). Transverse electric
When for a transmission line the open circuit and short circuit impedance are 20W and 5 W respectively then the characteristic impedance of the line is -
a. ) 100 Ohms
b ). 50 Ohms
c. ) 25 Ohms
d. ) 10 Ohms
In an ideal transmission line with matched load, the voltage standing wave ratio and reflection coefficient are respectively -
a. ) 1 and 1
b ). infinity and 1
c ) infinity and 0
d. ) 1 and 0
When an electric charge of 100 coulombs is enclosed in sphere of radius 100 m then the electric displacement density ( in coulomb / m2) D is –
a. ) 0.0833
b ). 0.833
c. ) 1.666
d. ) 10
For the dominant mode in a rectangular wavelength with breadth 10 cm, the guide wavelength for a signal of 2.5 GHz will be -
a. ) 12 cm
b. ) 15 cm
c. ) 18 cm
d. ) 20 cm
When the phase velocity of an electromagnetic waves depends on frequency in any medium, the phenomenon is called-
a. ) Scattering
b. )Polarization
c. ) Absorption
d. ) Dispersion
Antennas commonly used for microwave links are -
a. ) Loop antenna
b. ) Log-periodic antennas
c. ) Paraboloidal dishes
39. One of the following instrument which may be used to measure the optical activity of compounds is –
a. )Infrared spectrometer
b. ) Atomic absorption spectrometer
c. ) Polarimeter
d. ) Flouroscope
Schering bridge measures –
a. )Capacitance dielectric loss
b. ) Inductance
c. )Resistance
d. ) Mutual inductance
When a square wave is fed to an RC circuit, then –
a. ) voltage across R is square and across C is not square
b. ) voltage across C is not square and across R is not square
c. ) voltage across both R and C are square
d. ) voltage across both R and C are not square
The time constant of the RC circuit is –
a. ) less than the time period of the input square wave.
b ). much larger than the time period of the input square wave.
c. ) equal to the time period of the input square wave.
d ). none
Harmonic distortion for each frequency can be obtained by harmonic analyser of the –
a. )heterodyne type
b. ) tuned circuit type
c. ) fundamental suppression type`
d. ) bridge circuit type.
A three phase wattmeter requires –
a ). only two current coils and two pressure coils
b. )only one current coil and two pressure coil
c. ) only two current coils and one pressure coil
d. ) only current coil
A low pass filter circuit is basically –
a. ) a differentiating circuit with low time constant
b. ) a differentiating circuit with large time constant.
c. ) an integrating circuit with low time constant.
d. )an integrating circuit with large time constant.
If the differential pressure in restriction type flow measuring devices is then the flow will be proportional to –
When a system is represented by the transfer function then the dc gain of this system is –
a.) 1
b.) 2
c.) 5
d.) 10
Silicon based semiconductor device called thyristor was first fabricated by –
a). Jell laboratories in U.S.A
b). Maxwell laboratories in U.S.A
c.) Bell laboratories in U.S.A
d). GEC laboratories in U.S.A
A semiconductor based temperature transducer has a temperature coefficient of –2500mV/0C. This transducer is indeed a –
a.)Thermistor
b.) Forward biased pn junction diode
c. )Reverse biased pn junction diode
d.) FET
Which of the followings pairs of Telemetry situations and Modulation techniques and conditions is correctly matched-
a. )Pulse amplitude modulation Low amplitude signals
b. )Pulse position modulation For short distance when power is enough
c.) Pulse width modulation Power to be spent in telemetry is required to be low
d.) Pulse code modulation. Minimisation of interference effects.
The SCR ratings di/dt in A/m sec and dv/dt in n/m sec, may vary, respectively between-
a.) 20 to 500, 10 to 100
b. )both 20 to 500
c.) both 10 to 100
d.) 50 to 300, 20 to 500
Match the given controlled rectifiers with 50 Hz supply
a. )1 phase full converter with source inductance
b. )3 phase full converter
c.)3 phase semiconductor
d. )3 phase halls wave converter
For natural or forced commutation the cyclo converters (CCs) requires as under.
a) natural commutation in both step up and step down CCs
b.) forced commutation in both step up and step down CCs
c.) forced commutation in step up CCs
d). forced commutation in step down CCs
The peak inverse voltage in ac to dc converter system is highest in-
a). single phase full wave mid point converter
b). single phase full converter
c) 3 phase bridge converter
d). 3 phase half wave converter.
A single phase full converter feeds power to RLE load with R = 6 W L = 6 MH and E = 60 V. The ac source voltage is 230 V, 50 Hz, For continuous conduction, the average value of load current for a firing angle delay of 50 is
a.)12.181 A
b). 14.81 A
c). 16.76 A
d.) 32.40 A
Which one of the following is the Fourier transform of the signal given in fig. B if the Fourier transform of the signal in fig A is given by -
What is 215 complement of 00011100-
a.) 11100011
b.) 10001100
c.) 11100100
d.) 10000111
In C programming a expression contains relational operators, assignment operators and arithmetic operators if parentheses is absent then execution follows
a.) assignment, relational, arithmatic
b.) arithmatic, relational, assignment
c.) relational, arithmatic, assignment
d.) assignment, arithmatic, relational
In semiconductor memory information stored in form-
a.) binary
b.) hexadecimal
c.) octal
d.) ASCII
i\p to Not gate gives o/p as-
a ) inversion of some bits
b.) 2’s complement of i\p
c.) 1’s complement of i\p
d.) o/p is some as i\p
A negative logic means-
a .)logic 0 and 1 are represented by a +ve voltage respective
b). logic 0 and 1 are presented as –ve and +ve voltage
c. )logic 0 voltage is higher than logic 1 voltage level
d.) logic 0 voltage is lower than logic 1 voltage level
For designing D flip flop from SR FF a circuit is aloud at 01p of SR FF is-
a.) AND
b.) OR
c.) NOR
d.) NOT
The transistor shown in fig is
a. ) Silicon, NPN with Ic = 0.5 mA
b.) Silicon PNP with Ic = 0.5 mA
c.) Germanium PNP with IE = 0.5 mA
d.) Germanium NPN with Ic=0.5 mA
A 20,000 Ohms per volt meter will deflect full-scale with a current of -
a.) 50 mA
b.) 50 mA
c.) 100 mA
d.) 1000 mA
A plate modulated class –CRF power amplifier produces 100 KW of radiated power at 100 % modulation. The modulating audio amplifier supplies approximately -------- kW of this power-
a.)50
b).33
c).22
d).11
An amplifier without feedback has a distortion of 15 % and gain of 40. When 10% negative feedback is applied the distortion will become-
a.) 50 %
b). -45 %
c). 3%
d). -5%
MODEM implies-
a.)Modulator at transmitting side and ditector at the receiving side
b.)Which deals with analog signals and shows digital information
c.)Analog to digital at transmitting side and digital to analog at a receiving side
d).A device which deals with digital signals only
Twisted ring and ring counters are examples of –
a. )Synchronous counters
b.) Asynchronous counters
c.) both a and b
d.) None of the above
Specify Non characteristic flip flop in the following –
a.) The outputs are complement of each other
b.) The flip flop has two input signals
c.) The flip flop has two output signals
d). The flip flop is a bistable devise with only two stable states
The voltage obtained when digital input is 001 is a 3 bit R-2R ladder DIA converter is-
a.) VR/22
b.) VR/21
c.) VR/23
d.) none of the above
Identify NOT an octal number-
a.) 19
b). 15
c.) 77
d.) 101
The set of binary digits 01000100 represent,s-
a.) number 6810 in a pure binary computer
b.) number 44 in 8421 BCD code
c) Both a and b
d.) None of the above
The system matrix of a continuous time system, described in the state variable form is –
The system is stable for all values of x and y satisfying –
a.)x < 1/2, y < 1/2
b). x < 0, y < 2
c. )x > 1/2 , y >0
d.) x < 0 , y < 1/2
The break away and break in point in the root locus for open loop transfer function G(S) H(S) = are located respectively at –
a). –2 and -1
b). –2.47 and –3.77
c.) –4.27 and –7.73
d.) –7.73 and –4.27
The transfer function for the given system shown in figure is –
The type and order of the system whose Nyquist plot is shown in fig is-
a.)0.1
b.) 1,2
c.) 0,2
d). 2,1
The overall transfer function in a second order is given by-
Its resonant frequency is -
a.) 2
b.)
c).
d.) 3
The detection of an AM waveform in an Envelope –
a.)One side band and full amplitude carrier are needed
b.) Both side bands and full amplitude carrier are needed
c). Only two side bands are needed
d). Upper side band and part of carriers are needed
Satellite used for intercontinental communication is known as –
a.) Comsat
b). Dom sat
c.) Mari sat
d). Intelsat
Mark out non submarine cable –
a. )TAT – 7
b.) INTELSAT V
c.) ATLANTIS
d. )CANTAT 2
The capacity of an analog communication channel with 4kHz bandwidth and 15 dB SNR is approximately-
a). 20,000 bps
b). 16,000 bps
c.) 10,000 bps
d.) 8,000 bps
The blind speed of an MTl radar can be avoided by changing the-
a.) Carrier frequency
b.) Pulse repetition frequency
c. )Antenna rotation rate
d.) Transmitted power
The output voltage in a feedback series regulator circuit is regulated by controlling the-
a.) Magnitude of the input voltage
b.) Gain of the feedback transistor
c.) Reference voltage
d.) Voltage drop across the series pass transistor
Indicate the signal not transmitted in colour TV-
a.) Y
b.) Q
c.) R
d.) I
As frequency of singal increases-
a.) Directivity increases & beam width increases
b.) Directivity & beam width decreases
c.) Directivity increases & beam width decreases
d.) Directivity decreases & beam width increases
The number of hardware interupts (which require an external signal to interrupt) present in on 8085 mP are
a). 1
b). 4
c.) 5
d.) 13
Highest priority interupt is-
a. )INTR
b. )RST 7.5
c. )RST 6.5
d. )TRAP
One instruction cycle means-
a. )Time require to execute set of instructions
b. )Time require to execute one instruction
c.) Time require to complete one operation of accessing memory, or I/o
d.) None of above
If the clock freq. is 5 mH3 how much time is required to execute on instruction of 18 T-states-
a. )3.6 msec.
b.) 36 m sec.
c.) 36 m sec.
d.) 36 sec.
In data transfer operation which flog get affected-
a. )zero flog
b. )carry flog
c. )sign flog.
d.) none
CMP instruction comes under group -
a. )Data transfer
b. )Brouching operations
c). Machine control operation
d.) logical operations
The logic operation-
a.) are performed in relation to content of Accemce lotor
b).can be performed derectly with content of the register.
c.)are performed without content of a
d.)none of above.
What happen when PUSH instruction executed -
a.) data retrieved from stock to register
b.) data from register saved on the stock.
c.) 16 bit address of instruction saved on stock.
d.) 16 bit address from stock retrieved
SIM stands for-
a. ) serial interface memory
b.) set interrupt mosk
c. ) set if minus
d.) set internal memory
Maximum clock frequency required to operate 8085-
a. )2 MHz
b.) 3 MHz
c) 6 MHz
d. )9 MHz
ASCII code is-
a). 7 bit
b). 8 bit
c.)16 bit
d.) 32 bit.
In memory mapped I/O address lines are-
a. ) 8
b.) 16
c.) 32
d.) 64
The parity bit adding technique is used for -
a. )Indexing
b. )Coding
c. )Error detection
d. )Controlling
A demultiplexer-
a. )has multiple i/p and single o/p
b.) has single i/p and multiple o/p
c.) has multiple i/p and multiple o/p
d.) has single i/p and single o/p
Subroutines are useful-
a. )to reduce storage requirements
b.) to increase programming speed and reduce storage
c.) most applications are same
d.) but increases expense
As daring goes with temerity same way clear-sighted with –
a. )Perspicacity
b.) Impulsiveness
c.)Energy
d. )Clemency
A man who visits his friend is a –
a. )Host
b. )Guest
c. )Master
d.) Owner
Zealot is –
a. )beginner
b.) Patron
c.) fanatic
d.) Murderer
Give the plural of ‘Mouse’ –
a. )Mouse’s
b). Mice
c). Mouse
d). None
Find the part of speech of the underlined word –
Shama and Radha were playing together.
a. )Preposition.
b. )Noun
c. )Conjunction.
d). Verb.
Which of the following is not one of the multiple names of ganesha?
a). Vinayaka
b). Lambodra
c.) Ekadanta
d.) Vighneshwara
e. )all of the above
If a man weighs 60 Kilograms on earth, how much will be his weight on the moon?
a. )50 kg
b. )40 kg
c. )20 kg
d. )10 kg
The only Indian star selected for waxing at the famous Madame Tussaud’s wax is-
a. )Salman Khan
b. )Amitabh Bachan
c. )ShahRukh Khan.
d. )Raj Kapoor
Rate of gowth of per capita income in India drops down to – percent in 2000-2001-.
a. )5.3 percent
b. )3.5 percent
c. )4.8 percent
d. )8.4 percent
Ascorbic acid is the chemical name of-
a. )Vitamin A
b. )Vitamin B
c. )Vitamin C
d.) Vitamin D
All India Muslim League was founded by-
a. )Nawab Slimullah Khan
b. )Sir Mohd Iqubal
c.) Sir syed Ahmed Khan
d.) Moulana Shaukat Ali
Red Blood corpuscles are formed in-
a. )Marrow
b.) Kidney
c). Liver
d). heart
The southern most tip of India is in-
a. )Lakshadweeep
b.) Kanya Kumari
c. )Andaman and Nicobar Islands
d. )Rameswaram
The first bowler in cricket history to take 500 test wickets is-
a.) Imran Khan
b). Courtney Walsh
c). Shane Warne
d.) Muttiah Murlidharan
President of the National Consumer Disputes Redress al Commission (NCDRC) is-
a.) Mr. D.C Wadhwa
b). Mr. A. P Wadhwa
c.) Mr. A. C Wadhwa
d.) Mr. D. P Wadhwa
C.V. Raman got Nobel Prize for-
a. )Themodynamics
b.) Quantum theory
c. )Optics and spectroscopy
d.) Nuclear Physics
First governor general of Bengal-
a). Lord Clive
b.) Lord warren Hastings
c. )Lord Lytton
d.) Lord Ripon
The slogan “Do or Die” is associated with-
a.) Subhash Chandra Bose
b.) Gandhigi
c.) Harijan
d.) Satyagraha
Champaran is in the state of-
a). Gujarat
b). Maharashtra
c.) Bihar
d). Madhya Pradesh
These tribes are found in central Asia-
a. )Garos
b. )Kirghiz
c.) Lushai
d). Santhals
SAMPLE PAPER 8:
ReplyDeleteBSNL GE-JTO Recruitment Examination
Test Paper - IV
Reactive current through the capacitive load produces -
a) Magnetic field
b) Electric field
c) Supermagnetic field
d) None
One of the following which gives piero-electric effect is -
a) Mu metal
b) PVDF
c) Sapphire
d) Ferrites
PZT piezo- electric materials have -
a) Higher curie temperature
b) Lower curie temperature
c) Absolute temperature
d) None
The residual resistivity of a binary alloy at OK is -
a) The sum of the residual resistivities of the component metals
b) The difference of the residual resistivities of the component metals.
c) The product of the residual resistivities of the component metals
d) Dependent on the concentration of the minor component in the alloy
In active filter circuits, inductances are avoided mainly because they -
a) Are always associated with some resistance
b) Are bulky and unsuitable for miniaturisation
c) Are non-linear in nature
d) Saturate quickly
The depletion layer across a p-n junction lies -
a) mostly in the p-region
b) mostly in the n-region
c) equally to both p and n region
d) entirely in the p-region
The voltage induced in a loop of wire rotating in a strong and steady magnetic field is -
a) pulsating dc
b) dc
c) rectified ac
d) ac
One of the following types of capacitor which is polarized is -
a) Electrolytic
b) Ceramic
c) Paper
d) Mylar
Electric shock is-
a) Always fatal
b) Never fatal
c) Sometimes fatal
d) Always disfiguring
A typical value of filter capacitor for 50 Hz ripple is -
a) 16mF
b) 10F
c) 10mF
d) None
A telephone relay armature is made of material with -
a) High electrical conductivity
b) Low electrical conductivity
c) Negligible conductivity
d) None
Larger the value of filter capacitor -
a) Larger is the peak-peak value of ripple voltage
b) Larger is the peak current in the rectifying diode
c) Longer is the time that current pulse flows through the diode
d) Smaller is the dc voltage across the load
Barrier potential in a P-N junction is caused by -
a) Thermally generated electrons and holes
b) Diffusion of majority carriers across the junction
c) Migration of minority carriers across the junction
d) Flow of drift current
The polarity of VGS for E-only MOSFET is -
a) positive
b) negative
c) zero
d) depends on P or N channel
The following which will serve as a donor impurity in silicon -
a) Boron
b) Indium
c) Germanium
d) Antimony
When bias applied to a vari-cap diode is increased, its capacitance -
a) is decreased
b) is increased
c) remains constant
d) first increases and then decreases.
In case of a bipolar transistor a is -
a) positive and greater than 1
b) positive and less than 1
c) negative and greater than 1
d) negative and less than 1
A BJT is -
a) not very sensitive to radiations
b) very sensitive to radiations.
c) independent of radiations
d) none
An SCR may be considered to be -
a) 2 diodes
b) 3 diodes
c) 4 diodes
d) 5 diodes
For a BJT, under the saturation condition -
a) IC = bIB
b) IC > bIB
c) IC is independent of all other parameters
d) IC < bIB
In modern MOSFET’s the material used for the gate is -
a) High purity silicon
b) High purity silica
c) Heavily doped polycrystalline silicon
d) Epitaxial grown silicon
Find the Norton,s equivalent of the circuit given below -
When the source in the circuit shown is a sinusoidal source then the input voltage is -
a) 10V
b) 5V
c) 27V
d) 24V
The time constant of the network shown in the given figure is given by -
The voltage transfer ratio of two-port networks connected in cascade may be conveniently obtained from the -
a) product of the individual ABCD matrices of the two networks
b) product of voltage transfer ratios of the two individual networks
c) sum of the Z- matrices of the two networks
d) sum of the h – matrices of the two networks
When a network has response with time as shown in fig. then which one of the following diagrams represents the location of the poles of this network ?
For the network shown in the given fig. the ratio is -
An attenuator drops a 10V signal to 50mv in an experiment. The loss in decibels is -
a) –40dB
b) –6dB
c) –55dB
d) –60dB
When the network has 10 nodes and 17 branches then the number of different node pair voltages would be -
a) 7
b) 9
c) 10
d) 45
The circuit shown in the following fig. will act as an ideal current source with respect to terminals A and B when frequency is -
a) zero
b) 1rad/s
c) 4rad/s
d) 16rad/s
When a short vertical grounded antenna is required to radiate at 1MHz and the effective height of the antenna is 30 m then the calculated value of the radiation resistance is -
a) 1.58 W
b) 158 W
c) 15.8 W
d) None of these
Shannon’s law relates -
a) antenna gain to bandwidth
b) frequency to antenna gain
c) antenna gain to transmission losses
d) information carrying capacity to S/N ratio
One of the following modes which has the characteristic of attenceation becoming less as the frequency is increased and is attractive at microwave frequencies of circular cylindrical wave guides is -
a) TE1 mode
b) TM01 mode
c) TE01 mode
d) Higher order mode
For a transmission line, the propogation constant, for a TEM wave travelling in it is given by (Where the symbols have the usual meanings ) -
a) [ (R+jwL) (G+jwc)]
b) [ R+jwL) (G+jwc)] ½
c) [ (R-jwL) (G + jwc) ] ½
d) [(R-jwL) ( G+jw2c)]1/3
The advantages of wave guides over co-axial lines would include which of the following features-
1. Easier to use 2. lower power losses
3. Higher operating frequencies possible
a) 1 and 2
b) 1 and 3
c) 2 and 3
d) 1,2 and 3
When a 75 ohm transmission line is to be terminated in two resistive loads R1 and R2 such that the standing pattern in the two cases have the same SWR , then the values of R1 and R2 (in ohms) should be -
a) 250 and 200 respectively
b) 225 and 25 respectively
c) 100 and 150 respectively
d) 50 and 125 respectively
The degenerate modes in a wave guide are characterized by -
a) Same cut off frequencies but different field distribution
b) Same cut off frequencies and same field distributions
c) Different cut off frequencies but same field distributions
d) Different cut off frequencies and different field distributions
A TEM wave impinges obliquely on a dielectric-dielectric boundary with Er1=2 and Er2=1, the angle of incidence for total reflection is -
a) 30 0
b) 60 0
c) 45 0
d) 90 0
The radiation pattern of Hertzian dipole in the plane perpendicular to the dipole is a -
a) Null
b) Circle
c) Figure of eight
d) None of the above
40. Permeance is the -
a) square of reluctance
b) reluctance
c) reciprocal of the reluctance
d) cube of the reluctance.
One of the following which is an active transducer is -
a) Photoelectric
b) Photovoltaic
c) Photo-conductive
d) Photo emission
The wein bridge uses only -
a) Inductors
b) Capacitors
c) Resistors
d) Capacitors and Resistors.
The greater the value of Q -
a) higher will be the bandwidth of the resonant circuit.
b) smaller will be the bandwidth of the resonant circuit.
c) nothing can be said)
d) none.
The most serious source of error in a) c) bridge measurement is -
a) eddy currents
b) leakage currents
c) residual imperfectness
d) stray fields.
Moving iron instruments -
a) have a linear scale
b) do not have a linear scale
c) both a and b)
d) none.
If accuracy is the main consideration, which one of the following voltmeters should one select -
a) 100 v ; 2 mA
b) 100 v ; 100 ohm/volt
c) 100 v ; 1mA
d) 10,000 v ; 10 mA
In dc tacho generators used for measurement of speed of a shaft, frequent calibration has to be done because -
a) the contacts wear off
b) the strength of permanent magnet decreases with age
c) the armature current produces heating effect
d) there is back emf.
Ideal transformer cannot be described by -
a) h parameters
b) ABCD parameters
c) G parameters
d) parameters
Consider the following statements -
A3- phase balanced supply system is connected to a 3 phase unbalanced load) Power supplied to this load can be measured using
1. Two wattmeters
2. One wattmeter
3. Three wattmeters
Which of these statements is/are correct?
a) 1 and 2
b) 1 and 3
c) 2 and 3
d) 3 alone
The function of the reference electrode in a pH meter is to -
a) Produce a constant voltage
b) Provide temperature compensation
c) Provide a constant current
d) Measure average pH value
Match the column A (Devices) with column B (Characteristics) and select the correct answer by using the codes given below the column -
Column A Column B
A) BJT 1. Voltage controlled negative resistance
B) MOSFET 2. High current gain
C) Tunnel diode 3. Voltage regulation
D) Zener diode 4. High input impedance
Codes :
A B C D
a) 1 4 2 3
b) 2 4 1 3
c) 2 3 1 4
d) 1 3 2 4
A thyristor during forward blocking state is associated with.-
a) large current , low voltage.
b) low current , large voltage.
c) medium current , large voltage
d) low current, medium voltage.
In controlled rectifiers, the nature of load current i.e. whether load current is continuous or discontinuous -
a) does not depend on type of load and firing angle delay
b) depends both on the type of load and firing angle delay
c) depends only on the type of load)
d) depends only on the firing angle delay.
A single phase voltage controller feeds power to a resistance of 10 W . The source voltage is 200 V rms. For a firing angle of 900 , the rms value of thyristor current in amperes is -
a) 20
b) 15
c) 10
d) 5
In the performance of single phase and three phase full converters the effect of source inductance is to
a) reduce the ripples in the load current -
b) make discontinuous current as continuous
c) reduce the output voltage
d) increase the load voltage.
The cycloconverters (CCs) require natural or forced commutation as under -
a) natural commutation in both step up and step down CCs
b) forced commutation in both step up and step down CCs
c) forced commutation in step up CCs
d) forced commutation in step down CCs
Power transistors are more commonly of -
a) silicon npn type.
b) silicon pnp type.
c) silicon nnp type.
d) silicon npp type.
C is a -
a) Middle level language
b) High level language
c) Low level language
d) None of above
What will be output of program
main ( )
{ int i ;
print f ("Enter value of i");
scant ("%d", & i);
if ( i = 5 )
print f ("you entered 5");
else
print f ("you entered %d", i ); }
if user entered 100 then
a) 5
b) 100
c) 1005
d) None
(7F)16 + (BA)16 = (?)16-
a) 481
b) 139
c)–481
d) –139
Two’s complement of 3 bit nonzero linory number is some or original number is all bits accepts-
a) MSB are zeros
b) LSB are zeros
c) MSB are ones
d) LSB are ones.
The schematic circuits of RTL NOR gate is-
Transistors with high frequency have -
a) Thick base
b) Thin base
c) Some other feature
d) None of the above
Telephone traffic is specified in terms of -
a) Average waiting time
b) Grade of service
c) Peak waiting time
d) Erlangs
In a Hartley oscillator -
a) Necessary phase relation is obtained by connecting grid and plate electrodes to the opposite ends of the tuned circuit.
b) The mutual inductance must have the appropriate polarity.
c) Both grid circuit and plate tuned circuit offer inductive reactance
d) None of the above
The condenser C is charged in a bootstrap sweep generator -
a) Linearly but the discharge is non linear
b) Non linearly but the discharge is linear
c) Linearly and the discharge is linear
d) Non linearly and the discharge is non linear
In an audio amplifier audio signals become garbled and hence difficult to understand when an ac input current is large enough to drive the output to -
a) saturation only
b) Cut off only
c) Either saturation or cut off
d) A value off the load line
Five 1 bit registers are referred as -
a) Flags
b) Slags
c) Tags
d) None of the above
Next binary number after 0,1, 10, 11 is -
a) 12
b) 101
c) 100
d) 110
Identify coincidence logic circuit in the following –
a) b)
c) d)
The output analog voltage Vo is given by -
If an inverter is placed at the input to an SR flip flop, the result is -
a) T flip flop
b) D flip flop
c) JK flip flop
d) BCD decade counter
See the Root locus diagram of a system and the following statements :-
1. The open loop system is a second order system.
2. The system is over damped for
3. The system is absolutely stable for all value of R.
Which of these statements are correct?
a) 1, 2, & 3
b) 1 and 3
c) 2 and 3
d) 1 and 2
For the transfer function G(S)H(S) = the phase cross over frequency is -
a) 0.5 rad/sec
b) 0.707 rad/sec
c) 1.732 rad/sec
d) 2 rad/sec
If the open loop transfer function of the system is G(S) H(S) =
then a closed loop pole will be located at S = -12 wher the value of K is -
a) 4355
b) 5760
c) 9600
d) 9862
Considering the following open loop transfer function -
The correct sequence of these systems in increasing order of the time taken for the unit step response to settle is –
a) 1, 2, 3
b) 3, 1, 2
c) 2, 3, 1
d) 3, 2, 1.
Considering unit feed back control system in the given figure, the ratio of time constant of closed loop response to open loop response will be -
a) 1: 1
b) 2 :1
c) 3 : 2
d) 2 : 3
Angle subtended by earth at geostationary communication satellite is -
a) 17.340
b) 51.40
c) 1200
d) 600
For data transmission phase modulation is commonly used because -
a) Phase can be varied from +1800 to -1800
b) It is resistant to the effects of noise.
c) Demodulation is very easy
d) It gives highest data rates that can be transmitted over a given channel.
Several channels are interleaved and then transmitted together is known as –
a)Frequency division multiplex
b) Time division multiplex
c) A group
d) A super group
Identify the wrong statement-
The radar cross section of a target -
a) Depends on the frequency used
b) May be reduced by special coating of the target
c) Depends on the aspect of a target, if this is non spherical
d) Is equal to the actual cross-sectional area for small targets.
Considering following parameters -
1. Loss in the media) 2. Permeability of the media) 3. Frequency of the wave 4. Velocity of the wave. Which of these parameters are responsible for the change of phase of a propagating electromagnetic wave?
a) 1, 2, and 3
b) 2, 3 and 4
c) 1, 3 and 4
d) 1 and 4
In super heterodyne receivers double spotting is caused by -
a) poor front-end rejection
b) misalignment of receiver
c) detuning of one or more IF stages.
d) non functioning of AGC
The number of lines per field in the United States TV system is -
a) 262 1/2
b) 525
c) 30
d) 60
In a TV receiver the color killer -
a) cuts off the chroma stages during monochrome receivers.
b) ensures that no color is transmitted to monochrome receivers
c) prevents color overloading
d) makes sure that the color burst is not mistaken for sync pulses, by cutting off reception during the back porch.
The nominal capacitance of a coaxial RF cable is of 40 pF/m and the characteristic impedance of 50W. The inductance of the cable is-
a) 1mH/m
b) 10 mH/m
c) 0.1 mH/m
d) 0.01 mH/m
Transmission of wave through Dominant mode is -
a) distortion less transmission
b) generates undesirable harmonic distortion
c) having loss of power
d) None of above.
Lower the standing wave ratio (SWR) -
a) Greater mismatch error
b) Lower mismatch error
c) No effect on matching
d) Moderate mismatch error
In klyrtron oscillator for getting wide range of oscillations resonators should be -
a) Critically coupled
b) Under coupled
c) Over coupled
d) No coupling required
The critical frequency is always -
a) Lower than maximum usable frequency
b) Equal to maximum usable frequency
c) Higher than maximum usable frequency
d) None of above
The PIN diode based on -
a) Nonlinear resistance
b) Nonlinear reactance
c) Negative resistance
d) Controllable impedence
Which antenna having circular polarization -
a) Horn antenna
b) Lens antenna
c) Helical antenna
d) Discone antenna
The i/p S/N ratio of system is 50 and the o/p S/N ratio is 5 the noise figure is -
a) 250
b) 55
c) 10
d) 45
In the 8085 mP, the RST 6 instruction transfers the program execution to the following location -
a) 30 H
b) 24 H
c) 48 H
d) 60 H
In instruction cycle first operation is -
a) Memory read
b) Address read
c) Opcode fetch
d) Data read
CMP instruction comes under group -
a) Data transfer
b) Branching operations
c) Machine control operation
d) Logical operations.
In which logic operation does not effect any flags -
a) ANA B
b) ORA B
c) XRI A2H
d) CMA
What happen when CALL instruction executed -
a) Data retrieved from stock to register
b) Data from register saved on the stock.
c) 16 bit address of instruction saved on stock
d) 16 bit address from stock retrieved)
The mark status of mark able interrupts is defined according to content of -
a) stack pointer.
b) HL register .
c) Program counter
d) Accumulator
The decoder is a logic ckt that -
a) Amplifies the current or power at i/p.
b) Identifies each combination of the signals present at i/p
c) Provides appropriate code as o/p for each i/p signal
d) Both b & c)
The young man was quickly promoted when his employers how --------------- he was -
a) indigent
b) indifferent
c) assiduous
d) cursory.
As letter is alphabet so zodiac is -
a) almanac
b) beacon
c) sign
d) signal.
What is the correct meaning of prudish.?
a) careful
b) fast
c) God
d) brave
Pick out the odd matching with reference to number -
a) woman – women.
b) hair – hairs
c) child – children.
d) foot – feet.
Choose the phrase that is most nearly similiar in meaning to the word given below-
Abut is
a) Stimulate
b) Grasp
c) Oppose
d) Adjoin
The highest mountain peak in Indian Territory is -
a) Mount Everest
b) Kanchenjunga
c) Nanda Devi
d) Mount Kailash
German silver is an alloy comprising -
a) Copper, Nickel and Zinc
b) Silver, copper and Zinc
c) Silver Nickel and Zinc
d) Nickel, Zinc and Lead
Mughal Emperor Bahadur Shah Zafar’s mausoleum is in -
a) Delhi
b) Lahore
c) Yangon
d) Agra
On which date the World Trade Centre in New York and Pentagon in Washington d)C was attacked by terrorist -
a) 12 September 2001
b) 11 September 2001
c) 11 July 2001
d) 20 December 2001
India defeats South Africa in the finals of the inaugural champions challenge Hockey Tournament in Kualalumpur by -
a) 4-2
b) 2-0
c) 3-2
d) 2-1
Which planets in the solar system are known as ‘Inferior Planets’ -
a) Earth and Mars
b) Earth and Mercury
c) Mars and Mercury
d) Mercury and Venus.
The largest Stupa in Southern India is at -
a) Nellore
b) Amravati
c) Tanjore
d) Kozhikode
The new chairman and Managing Director of Industrial Finance Corporaton of India (IFCI) is -
a) Mr. Vishwanath Prasad Singh
b) Mr. Jitendra Patil
c) Mr. Ragh
d) Mr. Shubhash chand Jain
Which one is the latest among rock-cut temples?
a) Ajanta
b) Ellora
c) Elephanta
d) All originated in the same period)
Number of organisations government ban in Jammu and Kashmir and the North East under the new ordinance ‘POTO’ is -
a) 20
b) 21
c) 22
d) 23
In bed of which river does Badrinath shrine stand?
a) Ganga
b) Mandakini
c) Alakananda
d) Bhagirathi
The nerve endings for the sense of sight are located in the part of the eye called the -
a) Cornea
b) Sclera
c) Iris
d) Retina
Fundamental duties were introduced in the constitution by the -
a) 40th Amendment
b) 42nd Amendment
c) 43rd Amendment
d) 44th Amendment
The Khalsa Panth was founded by -
a) Guru Hargovind
b) Guru Nanak Dev
c) Guru Tegh Bahadur
d) Guru Govind singh
Number of countries involved in international fleet review hosted by India is -
a) 27
b) 28
c) 29
d) 30
Thanks a lot for paper and information
ReplyDeletewhich book is better
ReplyDeletethanks for the questions but where are the answers to these question....
ReplyDeleteplease post the answers too...for our help.....
plz give answers for these questions
ReplyDeleteThanks Man for sample papers
ReplyDeletein power grid 50% question are numerical and 170 (120from core + 50
ReplyDeleteaptitude)question in 2 hour it is difficult to attend all questions
but aptitude questions are quite easy but core question are really
hard.....
1. resistance of ideal transformer winding
ans. zero
2. hysteresis loss in transformer depends on frequency as
ans. square of frequency
3. in no load test of transformer input power is equal to
ans. iron loss or constant losses
4. zero voltage regulation occurs in which power factor condition
ans. leading power factor condition
5. load sharing in parallel operation of transformer
ans. impedance is inversely proportional to KVA rating of transformer
6. relation between starting torque of slip ring induction motor and
squirrel cage induction motor
ans. starting torque of slip ring induction motor is more than
starting torque of squirrel cage induction motor
7. relation between rotor power input, slip and rotor copper loss in
induction motor
ans. rotor copper loss is equal to slip time the rotor input power
8. relation between starting torque when induction motor start with
the help of star delta starter and auto transformer
ans. in star delta transformer starting starting torque is 1/3 times
the full load torque with some other factor
9. due to feedback which factor increases
ans. stability of the system
10. in second order system damping factor
11. numerical on peak overshoot
12.numerical on steady state error
13. numerical on transfer function of system
14. numerical on stability of system
15. problem on root locus
16. effect of integral controller on system stability
ans. for closed loop system by integral controller steady state
stability increases
17. to gate high starting torque starting method of induction motor
ans. external resistance starting method
18. to gate low starting power factor in starting of induction motor
ans. external reactance starting method
19. relation between power transferred by 1phase line and 2 circuit line
20.bundled conductors are used to
ans. reduce corona loss
21. relation between corona loss with frequency and diameter of conductor
ans. corona loss directly proportional to frequency and inversely
proportional to diameter of conductor
22. series capacitor used in power system to
ans. series capacitor for stability of power system
23. insulation level is decided by
ans. switching over voltage
24. effect of using bundled conductor on inductance of conductor
ans. decreases
25. insulator type used when there is dead end or change in direction
of conductor
ans. strain type
26. resistance switching used in which circuit breaker
ans. air blast circuit breaker
27. relation between resistance , inductance and capacitance in
resistance switching
28. where are the lightning arrestars are located
ans. near the transformer
29. which type of relay are used in overloading
ans. thermal relay
30. whenever difference in current which relay is used
ans. differential relay
31. which distance relay is directional
ans. mho relay
32. damper winding are used in alternator for
ans. prevent hunting and provide high starting torque
33.effect of armature reaction
ans. both cross magnetising and demagnetising
34.question from inverted v curve of synchronous motor curve
35.numerical from source transformation technique
36. numerical related to find rms value of triangular wave
37. in series RLC circuit if frequency greater than resonent frequency
than impedence offered by circuit
ans. inductive
38.numerical from dc switching of inductor , capacitor and resistance
in a network
39. eddy current damping used in which type of instrument
ans. pmmc
40. fluid friction damping used in which type instrument
ans. horizontal MI
41. numerical from two wattmeter method
42. numerical from over ranging of digital instrument
43.two or three question from CRO
44.relation between latching current and holding current
ans. latching current> holding current
45. di/dt protection of thyrestor
ans . using inductor in series
46. difference between BJT and MOSFET
ans. in BJT sec. breakdown
47. terminal of IGBT
48. terminals of MOSFET
49. for proper commutation relation between circuit turn off time and
thyristor turn off time
ans. circuit turn off time must be greater than thyristor turn off time
50. specific of earthing transformer
ans. no secondary
--
rajendra jat
dr. mgr university
chennai
9380254127
Thanks Mr. Jat
ReplyDeleteHello Friends,
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