BSNL JTO (Junior Telecom Officers) Examination Question Paper - Part - 1
BSNL Recruitment of Junior Telecom Officers (Telecom.), Junior Telecom Officers (Civil) and Junior Telecom Officers (Electrical) Previous Year Question Papers.
1. 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
BSNL JTO (Junior Telecom Officers) Examination Question Paper - Part - 2
BSNL Recruitment of Junior Telecom Officers (Telecom.), Junior Telecom Officers (Civil) and Junior Telecom Officers (Electrical) Previous Year Question Papers.
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.
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.
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
a) 1995-2000
b) 1996-2001
c) 1997-2002
d) 1998-2003
97. How much electricity does
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)
c) India
d)
107. Shifting cultivation is commonly used in which of the following states?
a) Tamil Nadu
b)
c) Jammu and Kashmir
d) Nagaland
108. If 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
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 kp for the system is 4
2. The system type one.
3. The velocity error constant kv 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 reactant’s are respectively R and X1 its length and diameter are L and D for two phase a) c) servomotor, then-
In a PID controllers 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 D1 and D2 , 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
In data transfer operation which flag get affected-
a) 3140 flog.
b) carry flog
c) sign flog.
d) none
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)
b)
c) Brazil
d)
Palk strait separates-
a)
b)
c) Britain and
d)
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
a) 140
b) 200
c) 150
d) 100
Aswan Dam is located in-
a)
b)
c) Sudan
d)
Ghana Birds sanctuary is in the state of -
a) Rajasthan
b) Madhya Pradesh
c)Uttar Pradesh
d)
Dry ice is-
a) Frozen carbon monoxide
b) Frozen carbon dioxide
c) Frozen ammonia
d) None of these
East flower
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) 800 E longitude
b) E longitude
c) 1100 E longitude
d) 250 E longitude
The two days Shiv Shena Mahashivir of 2002 started at Shirdi on –
a) 9th April 2002
b) 10th April 2002
c) 8th April 2002
d) 11th April 2002
Which one is a good preservative of food?
a) Spirit
b) Formaldehyde
c) Sugar
61. The horizontal axis in a 3 bit unipolar D/A converter represents-
a.) Output bit combination
b.) analog output voltage
c.) input bit combination
d.) none of the above
62. ?Not allowed? condition in NAND gate SR flip flop is ?
a.) s = 0, R = 0
b.) s = 1, R = 1
c.) s = 0, R = 1
d.) s = 1, R = 0
63. Name the fastest logic family-
a) TTL
b. RTL
c.) DCTL
d.) ECL
64. Equation corresponding to De Morgan?s theorem in Boolean Algebra is ?
a.) (A+B) (A+B) = AA + AB + BA + BB
c.) A + AB = A
d.) None of the above
65. In the given fig find radix of the system ?
a.) 2b.) 4
c.) 6
d.) 8
66. Modems are used for data transmission telephone lines to ?
a.) increase the transmission capacity
b) improve noice performance
c.) incorporate error control coding
d.) eliminate dc component in the transmitted signal
67. The figure of a control system is shown. The maximum value of gain K for which the system is stable is-
a.)
b.) 3
c.) 4
d.) 5
68. Identify the example of open-loop system-
a.) A windscreen wiper
b.) Aqualung
c.) Respiratory system of an animal
d.) A system for controlling Anti-rocket missiles.
69. Consider the following expressions indicating the step or impulse response of an initially relaxed control system-
1. (5 ? 4e-2+) u(t)
2. (e-2t +5) (u(t))
3 .V(t) + 8e-2t u(t)
4 . V(t) + 4e-2t 4(t)
Those which correspond to the step and impulse response of the same system include-
a.) 1&3
b.) 1&4
c.) 2&4
d.) 1&4
70. A system is described by
To test its stability by Lyapunov?s method the following V functions are considered.
Mark the most suitable V-function in this case-
a.) Only V1
b.)Only V2
c.) Both V1 and V2
d.) Neither V1 nor v2
71. Identity the polar plot of a typical type zero system with open loop transfer function
72. The scattering matrix of a magic ?tee shown in the given figure is-
73. Which is the following relate to rational transfer function of a system-
1. Ratio of Fourier transform of output to input with zero initial conditions.
2. Ratio of
3.
4.
Codes
a.) 1 and 4
b.) 2 and 3
c.) 1 and 3
d.) 2 and 4
74. For the signal g (t) ? 10 cos (50 pt) cos2 (150at)
The Nyquist sampling state in t seconds is
a.) 150 samples per second
b.) 200 samples per second
c.) 300 samples per second
d.) 350 samples per second
75. In the case of a 70 MHz 1F carries for a transponder band width of 36 MHz; energy must lie between ? MHz.
a.) 34 and 106
b.) 52. And 88
c.) 106 and 142
d.) 34 and 142
76. Radar used to eliminate clutter in navigational application is ?
a.) Pulse radar
b.) Tracking radar
c.) MTI radar
d.) Mono pulse radar
77. The 1.55 mm windows is not yet in use with fiber optic systems because ?
a.)The attenuation is higher than at 0.85 mm
b) The attenuation is higher than at 1.3mm
c.) Suitable laser devices have not yet been developed
d.) It does not lend itself to wavelength multiplexing
78. Pre-emphasis in FM systems involves-
a.) Compression of the modulating signal
b.) Expansion of the modulating signal
c.) Amplification of lower frequency components of the modulating signal.
d.) Amplification of higher frequency components of the modulating signal.
79. In a terrestrial microwave system transmission of signals is achieved through-
a.) reflection from the ionosphere
b.) line of sight mode
c) reflection from the ground
d.) diffraction from the stratosphere.
80. Casse grain feed is used with a parabolic reflector to
a.) increase the gain of the system
b). increase the bandwidth of the system
c.) reduce the size of the main reflector
d.) allow the feed to be placed at a convenient point.
81. In most microwave communication link rain drop attenuation is caused due to-
a.) scattering of microwaves by water drops of specific size.
b) scattering of microwaves by a collection of droplets acing as a single body.
c.) absorption of microwaves by water and consequent heating of the liquid
d.) absorption of the microwaves by water vapor in the atmosphere.
82. Circuit in the given figure represents. ?
a.) an astable multivibrator
b.) A monostable multivibrator
c.) Voltage controlled oscillator
d.) Ramp generator
83. . D = r is-
a.) Maxwell?s 1st equation
b.) Maxwell?s II equation
c.) Maxwell?s III equation
d.) Maxwell?s IV equation
84. In a rectangular wave-guide which TM mode exists-
a.) TM00
b.) TM01
c.) Tm10
d.) TM11
85. In directional coupler a portion of power two velliry fram port 1) to port 2) is coupled to.
a). port 4
b). port 3
c. port 2.
d.) port 3 & 4.
86. For high power i.e. 10 w to 50 kw measurement ?
a.) Barometer are used
b.) Thermisters are used
c.) Calorimetric technique
d.) Calorimetric watt meter technique used
87. The difference between TWT & klystron is ?
a.) In TWT electrons are in contact with RF field for long time & in klystron for short time
b.) In klystron electrons are in contact with RF field for long time & in TWT for short time
c.) In klystron there is no contact in RF field & electrons while in TWT there is contact
d.) In TWT phase is no contact is RF field & electrons while in klystron there is contact
88. Which one is most suitable for transmission through wave guide-
a.) Hown antennas
b.) Bioconical antennas
c.) helical antenna
d. Discone
92. What will be status of z and c y flag after execution of SUB A instruction
a.) z = 0, cy = 0
b.) z = 0, cy = 1
c.) z = 1, cy = 0
d.) z = 1, cy = 1
93. Microprocessor accept interrupt only if.
a.) interrupt flip flop disabled.
b.) when INTA signal is low.
c. interrupt flip flop enabled.
d.) none of above.
94. Microprogramming is a technique
a.) for programming the microprocessor
b.) for writing small programs efficiently
c.) for programming the control steps of computer
d.) for programming o/p / i/p
95. High level programs like C are converted into machine language with the help of
a.) interpreter
b.) compiler
c.) operating
d.) system
96. (10110011)2 = (?)8
a.) 253
b.) 263
c.) 273
d.) 283
97. A Not gate at the output of AND gate converts AND gate into-
a.) NAND
b.) NOR
c.) AND
d.) NOPE.
98. The O/P of a logic gate is the gate must be-
a.) AND
b.) OR
c.) NAND
d.) X-OR
99. 38. A symbol of JK flip flop is-
100. A demultiplener-
a.) has multiple i/p and single o/p
b.) has multiple i/p and multiple o/p
c.) has multiple i/p and multiple o/p
d.) has single i/p and single o/p
101. Which of the following best describes the authour`s attitude toward fairy tales ?
a.) fascination
b.) open approval.
c.) Indulgent tolerance.
d.) Scornful.
102. What type of sentence is this ?
Hurray! We won the match
a.) Exclamatory
b.) assertive
c.) Negative
d.) Affirmative
103. Before which of the following word will you put ?a?
a.) hour
b.) M. A.
c.) Umbrella
d.) Man
104. The noun form of ?fresh? is ?
a.) freshly
b.) freshen
c.) fresheners
d.) fresh itself
105. The word ?clang? is an example of ?
a.) Simile
b.) inversion
c.) onomatopoeia
d.) irony
106. The Forbes magazine acclaimed Azim Premji as richest
a.) Pentafour software
b) Infosys
c.) IBM
d.) Wipro
107. Bharat Ratna award for the year 2001 goes to-
a.) Lata Mangeshkar and Zakeer Hussain
b.) Zakeer Hussain and Bismillah Khan
c.) Bismillah Khan and Lata Mangeshkar
d.) Lata Mangeshkar and Ustad Amzad Ali Khan
108. Mr. George W-Bush takes over as ?? President of the
a.) 42nd
b.) 43rd
c.) 40th
d.) 45th
109. New Chief Minister of
a.) T. Venkat Naidu
b.) K. Hari Harh
c.) N. Rengaswany
d.) M. Mudliar
110. No court has the jurisdiction to interfere with the election process once set in motion by the Election commission. This is enshrined in Article-
a.) 311
b.) 329
c.) 356
d.) 365
111. Ostrich is a-
a.) Running bird
b.) Flying bird
c) Swimming bird
d.) Migratory bird
112. The main atmospheric gas responsible for green house is-
a.) Oxygen
b.) Nitrogen
c.) Ozone
d.) Carbon-dioxide
113. Which of the following is not a Kharif Crop-
a.) Rice
b.) groundnut
c.) Sugarcane
d.) gram
114. The function of World Bank is to-
a.) Help in reconstruction and development of world economy
b.) Facilitate poor countries to trade on concessional rates
c.) Promote growth of international trade and equilibrium in balance of payments
d.) Ease trade barriers and establish rule of fair trade
115. Speed of sound is maximum in-
a. )Water
b.) Air
c.) Steel
d.) Vacuum
116. ?Long years ago we made a trust with destiny.? Whose words are these-
a.) Subhash Chandra Bose
b.) Jawaharlal Nehru
c.) Lajpat Rai
d.) Bhagat Singh
117. Durand cup is associated with-
a.) Hockey
b.) Tennis
c.) Football
d.) Badminton
118. Rabindranath Tagore was awarded the Nobel Prize in literature in the year.
a.) 1908
b.) 1910
c.) 1913
d.) 1914
119.
a.) May 18, 1975
b.) May 20, 1974
c) May 17, 1974
d.) May 17, 1974
120. An emergency loan of $ 500 million to help reconstruct infrastructure in earth quake devastated
a.) Asian development Bank
b.) World Bank
c.) Swiss Bank
d.) Reserve Bank of
