Test Paper :12
Paper Type : Whole Testpaper
Test Location : BSNL JTO Exam 2005 - 7
Posted By : Jai




BSNL GE-JTO Recruitment Examination

Test Paper - VII

1. At a frequency below the resonant frequency series circuit is-

a.) Inductive

b.) Capacitive

c. )Resistive

d.)None


2. The electrical conductivity of metals is typically of the order of (Ohm –1 m-1) -

a.) 107

b. )105

c. )10-4

d. )10-6

3. he output of a piezoelectric crystal has-

a. )Low amplitude and low impedance

b. )High amplitude and high impedance

c. )Low amplitude and high impedance

d.)High amplitude and low impedance


4. The time constant associated with the capacitor charging in the circuit shown in the given figure is –

a. )6ms

b. )10ms

c. )15ms

d.) 25ms

5.

The Q factor of an inductor would be higher if it is made of –

a.) Thinner wire

b.) Longer wire

c.) Shorter wire

d.) Thicker wire
6.

A cavity resonator can be represented by –

a.) An LC circuit

b.) An LCR circuit

c.) A lossy inductor

d.) A lossy capacitor

7.

Air gap in the iron core of an inductor prevents –

a.) Core saturation

b). Hysterisis loss

c.) Flux leakage

d.) Transformer action
8.

Between the plates of an air capacitor if a glass slab is slipped without moving the plate then -

a.) Its capacitance is decreased

b.) Its capacitance is increased

c.) Its capacitance is hardly affected

d. )Capacitor is discharged

9.

For current to flow, a circuit must be –

a.) Isolated

b). Insulated

c.) Complete

d.) Protected

10.

Human ear can detect sound intensities of the order of –

a.) 10-20 w/m2

b). 10-13 w/m2

c.) 10-6 w/m2

d.) 10-3 w/m2

11.

A FET operates on –

a). Majority carriers only

b). Minority carriers only

c). Positively charged ions only

d.) None

12.

An SCR can conduct for a full half cycle or any part of it –

a. )and continue conduction for other half cycle

b.) but blocks the conduction for other half cycle

c.) nothing can be said

d.) none

13.

In CRT aquadag carries -

a. )aqueous solution of graphite

b. )sweep voltage

c. )secondary emission electrons

d.) none of the above


14.

From the following circuit, in order to obtain a 12-v stabilized supply the input to the terminals A and B

should be -

a.)less than 12v with terminal A positive with respect to terminal B

b. )greater than 12v with B positive with respect to A

c. )less than 12v with A negative with respect to B

d. )greater than 12v with A positive with respect to B

15.

When the value of ICBO in a silicon transistor of b = 49 is 20 Na then the value of ICEO for a temperature rise of 180c would be –

a. )8mA

b. )160 hA

c. )1mA

d. )7.84mA

16.

MOSFET can operate in –

a. )Depletion mode

b. )Enhancement mode

c. )Depletion-only mode

d. )Both a & b


17. For a circuit design the very factor of an SCR, which is to be taken into account is –

a. )




d.) None


18.

The functions of an oxide layer in an IC device is to –

a.) mask against diffusion or ion implant

b.) insulate the surface electrically

c.) produce a chemically stable protective layer

d.) all the above

19.

One of the following bipolar transistors which has the highest current gain bandwidth product for similar geometry is –

a.) NPN germanium transistor

b.) NPN silicon transistor

c.) PNP germanium transistor

d. )PNP silicon transistor.


20.

With the increasing temperature, the electrical conductivity would –

a.) Increase in metals as well as in intrinsic semiconductors.

b.) Increase in metals but decrease in intrinsic semiconductors.

c. )Decrease in metals but increase in intrinsic semiconductors.

d. )Decrease in metals as well as in intrinsic semiconductors.


21. For the following circuit, the current X is 3A then the power delivered by the dependent current source D is –

a.) 50 watts

b) 50 watts

c. )1500 watts

d. )15000 watts

22. The current in resistor R shown in the fig. will be –

a.) 0.2A

b.) 0.4A

c.) 0.6A

d.) 0.8A


23. In the network shown in the given fig. the capacitor C1 is initially charged to a voltage V0 before the switch S in the circuit is closed. In the steady state-

a.)C1 and C2 are charged to equal voltages

b.) C1 and C2 are charged with equal coulombs

c. )C1 and C2 are discharged fully

d. ) C2 alone is charged to voltage V0


24. The equivalent circuit of a wire-wound resistor can be represented as –









25. For the fig. shown the fundamental cutset for the branch 12 is –

a. )2, 1, 5

b. )2, 6, 7, 8

c. )2, 1, 3, 4,5

d. )2, 3, 4


26. Ideally, attenuator pads should not change –

a. )voltage level

b.) impedance level

c.) power level

d.) voltage, power or impedance level

27. When the two networks are cascaded through an ideal Buffer and if tr1 and tr2 are the rise times of the two networks, then the overall delay of the two networks together will be –









28. For the network shown in the following fig. one of the following theorems which can be conveniently used to calculate the power consumed by the 10W resistor is –

a. )Thevenin's theorem

b.) Maximum power transfer theorem

c.) Millman's theorem

d.) Superposition theorem

29. The nodal analysis is primarily based on the application of –

a. )KVL

b.) KCL

c.) Ohm's law

d.) Both b and c

30. When the driving point impedance of a network at a frequency of 1Hz is then the impedance can be realised as –







31. For a lossless line-

1. Series resistance is zero 2. Shunt conductance is zero

3. Shunt conductance is infinite 4. Series resistance is infinite

a. ) 1 & 2

b. )2 & 3

c. ) 2 & 4

d.)3 & 4

32. 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


33. When an A.M. broadcast radio transmitter radiates 10 kw power when the modulation percentage is 60 then the power of the carrier is-

a. ) 5.00 kw

b.) 7.69 kw

c.) 8.47 kw

d.) 9.17 kw

34. The main components of atmosphere responsible for absorption of em waves are -

a. ) Nitrogen and Oxygen

b. )Nitrogen and hydrogen

c.) Oxygen and water vapour

d. )Nitrogen and water vapour


35. The effective height of a linear antenna of length ‘l’ is say ‘x’ when the current distribution along it’s length is uniform and say, it is ‘y’ when the current distribution is sinusoidal then x/y is equal to -

a.) 2

b.) 1

c. ) 4/ p

d.) p/4

36. In a hollow rectangular waveguide, the phase velocity -

a.) Increases with increasing frequency

b.)Decreases with increasing frequency

c. ) Is independent of frequency

d.)Will vary with frequency depending upon the frequency range


37. For TM waves in a parallel plate waveguide, the minimum attenuation arising from imperfect conductors would occur at a frequency of (fc is the cut–off frequency )-

a.) 3fc

*



38. When a transmission line having 50 impedance is terminated in a load of ( 40 + j30) W then the VSWR is –

a.) j 0.033

b.)0.8 + j 0.6

c.) 1

d.)2

39. The ionosphere plays a significant role in radio wave propogation at-

a. )High frequencies

b.)Ultra-high frequencies

c. ) Microwave frequencies

d.)Optical frequencies

40. When a carrier wave is modulated at 100% it’s power is increased by-

a. )100%

b. )150 %

c. )50%

d.) 0%

41. Reluctances in series are –

a. )Subtractive

b.) Additive

c.) Multiplicative

d.) None.

42. When the meters X and Y requires 40 mA and 50 mA respectively for full scale deflection then –

a. )X is more sensitive

b.) Y is more sensitive

c. )both are equally sensitive

d.) not possible to determine from the given data.

43. In the context of ac bridge measurement the term "Wagner Ground" means –

a.) a special RC connection that eliminates stray magnetic effects.

b.) any unwanted and unintended ground connection.

c.) a large metal plate buried in the ground and connected to one corner of the bridge.

d.) a special RC connection that eliminates stray capacitance effects.


44. The gating and counting circuits of a digital counter –

a. )cannot handle MHz signals

b.) cannot handle GHz signals

c. )can handle GHz signals

d.) none.


45. De- sauty bridge is more widely used because of –

a. )simplicity

b. )perfect balance for imperfect capacitors

c. )perfect balance for air capacitors

d.) maximum sensitivity.

46. A schottky diode clamp is used along with a switching BJT for –

a. )reducing the power dissipation.

b. )reducing the switching time

c. )increasing the value of b

d.) reducing the base current.


47. The phenomenon of creeping occurs in –

a. )Energy meters

b.) Ammeters

c. )Wattmeter

d. )Voltmeters

48. A permanent magnet moving coil measures the –

a. )true rms value

b.) dc value

c.) peak value

d. )rms plus dc value
49. 49. The D`Arsonval meter movement can be converted into an audio frequency ac ammeter by adding to it a-

a. )thermocouple

b.) rectifier

c.) chopper

d. )transducer


50. Which one of the following detectors is generally used in ac bridges for audio frequency range ?

a. )Ac voltmeter

b. )CRO

c. )Headphones

d.) Vibration galvanometer.

51.

In single phase circuit capacitor used for power factor correction decreases –

a.) The power factor

b.) The line current

c.) Both a and b

d.) The line current and increases power factor


52.

In the given figure X the balanced bridge should be

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self-inductance having resistance

b. )A capacitance

c. )A non-Inductive resistance

d. )An inductance and a capacitance in parallel

53.

SiO2 layer in an integrated circuit provides –

a. )Electrical connection to external circuit

b.) Physical strength

c. )Isolation

d. )Conducting path

54.

For an SCR with turn on time of 5 microsecond, an ideal trigger pulse should have-

a. )short rise time with pulse width = 3 m sec

b. )vlong rise time with pulse width = 6 m sec

c. )short rise time with pulse width = 6 m sec

d.)long rise time with pulse width = 3 m sec

55. In a 3-phase half wave diode rectifier, the ratio of average output voltage to per phase maximum a c voltage is-

a) 0.955

b. )0.827

c.) 1.654

d. )1.169

56. In multiple pulse modulation used in PWN inverters, the amplitude and frequency for triangular carrier and square reference signals are respectively 4V, 6 KH2 and 1V, 1KH2. The number of pulses per half cycle and pulse width is respectively-.

a. )6, 900

b. )3, 450

c. )4, 600

d.) 3, 400


57. 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

58. In voltage source inverters-

a. )load voltage waveform o depends on load impedance z, where as load current waveform io does not depend on z,

b. )Both o and io depend on z,

c.) o does not depend on z where as depends on z

d. )both o and do not depend on z

59. For an RC driving – point impedance function, the poles and zeros-

a. )should alternate on real axis

b.) should alternate only on the negative real axis

c.) should alternate on the imaginary axis

d.) can lie anywhere on the left half place.


60.

The functions of connecting a resistor in series with gate - cathode circuit and a zener diode across gate cathode circuit are, respectively to protect the gate circuit from-

a.) over voltages, over currents.

b. )over currents over voltages.

c. )over currents, noise signals

d. )noise signals, over voltages.

61. 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


62. The circuit diagram shown in the figure consist of transistor is -

a. ) Parallel connection

b.) Cascode connection

c. ) Darlington connection

d. )Cascade connection


63. Increase of current in one transistor in a direct coupled circuit -

a. ) Causes an increase in current in other transistors of the circuit

b. )Causes a decrease in current in other transistor

c. )Does not affect the currents of other transistors connected in the circuit

d. )May either increase or decrease currents of other transistors connected in the circuit.


64. In a PNP transistor the charge carriers in the base region which play an important role in the operation of the transistor are-

a. ) The majority carriers

b.) The minority carriers

c. ) Nothing can be said

d. )None of the above

65. Voltage gain in a CC amplifier is-

a. )Cannot exceed unity

b. )Is always constant

c. ) Is dependent on input signal

d. )Depends on output impedance

66. Random-access-memory means –

a. )memory in a random fashion

b. )memory in a zigzag fashion

c. )memory in a circular fashion

d. )memory in a square fashion

67. BCD code is –

a. )an alphanumeric code

b. )a binary code

c .) the same thing as binary numbers

d. )non-weighed

68. The transfer function of a system is . The phase swift at w = 0 and w = a will be -

a.) 900 and –00

b. )-900 and 900

c. )-1800 and 1800

d. )None of the above

69. Number of resolutions in a 8 bit D/A converter is –

a. )8 bit

b.) 4 bit

c. )6 bit

d.) 10 bit

70. A bistable multivibrator is used as a –

a.) Free running multivibrator

b.) Frequency multiplier

c.) Frequency divider

d. )Wave shaper

71. The transfer function of a system is The phase shift at w = o and w = will be –

a. )900 and -00

b. )–900 and 900

c. )–1800 and 1800

d. )none of the above.
72. A forward path transfer function of a unity feedback control system is equal to The unit step response of this system starting from rest will have its maximum value at a time equal to –

a. )0 sec

b. )0.56 sec

c. )5.6 sec

d.) infinity.


73. To obtain the output position in a position control system, which one of the following transducers is used-

a.) Strain Gauge

b.) Load cell

c. )Synchro

d.) Thermistor
74. The maximum resonance peak for the second order transfer function T(S) = will be –

a. )4

b. )4/3

c. )2



75. Considering control system in the given fig .

For slight variation in G, the ratio of open loop sensitivity to closed pool

sensitivity will be given by-

a.) 1: (1+GH)

b.) 1 : (1+GH)-1

c. )1 : (1-GH)

d. )1 : (1-GH)-1

76. The diversity system in Troposcatter links is made use of to-

a. )Increase the bandwidth

b.) Prevent noise effects

c.) Increase the directivity of the antenna.

d.) Detect signal in the presence of fading.

77. Mark out wrong statement regarding compandor-

a.) It compresses the higher amplitude parts of a signal before modulation and expands them back to normal again after demodulation.

b.) It gives preferential treatment to the weaker parts of the signal

c.) For weaker signals, it gives a poor ratio of signal strength to quantizing error.

d. )Weaker signals, transverse more quantum steps than they would do otherwise and so quantizing error is reduced


78. Among other equipment a sub marine cable repeater contains –

a.) A dc power supply and regulator

b. )Filters for the two directions of transmission

c.) Multiplexing and demultiplexing equipment

d.) Pilot inject and pilot extract equipment

79. In a communication system noice is most likely to affect the signal-

a.) At the transmitter

b.) In the channel

c.) In the information source

d.) At the destination

80. The given circuit is a –

a.) Monostable multivibrator

b.) Frequency division circuit

c.) Miller sweeps circuit

d.) Bootstrap sweep circuit

81. In a plane transverse electromagnetic wave-

a.) Angle between electric and magnetic vectors is O.

b.)Angle between electric and magnetic vectors is 900

c.) Angle between electric and magnetic vectors is 1800

d.) None of above.

82. Directional coupler is a function of-

a.) Two port wave-guide

b.) Four port wove guide

c. )Single port wave-guide

d.) Size port wave-guide.

83.

Isolators are used to couple generator and load because –

a.) It increases power of signal

b.) To match any load with generator

c. )To get phase shifted o/p

d.) To differentiate load & generator


84.

In travelling wave tube for getting amplified output -

a. )Electron beam travels and RF field remains stationary

b.) Both electron beam and RF field travels in same direction

c. )Both electron beam and RF field remains stationary

d.) RF field travels and electron beam remains stationary


85.

Crystal diode works on principle of –

a. )Negative resistance

b. )Positive resistance

c. )Square low

d.) Linear impedance

86.

In gunn effect oscillator which mode having lowest operating frequency –

a. )Domain mode

b. )Delayed domain mode

c. )Quenched domain mode

d. )LSA mode

87.

In Reflex klystron maximum energy transferred to gap by electrons-

a. )eR

b. )ee

c. )el

d. )eR , ee, el

88.

The radio waves get absorbed by atmosphere depends –

a.) Their distance from transmitter is long

b.) Wave power is weak

c. )Improper polarization of wave

d.) Frequency of waves


89.

8085 mP has no of sets of communication lines-

a. )2

b.) 3

c.) 4

d. ) None

90.

No. of o/p ports in peripheral mopped I/p are up to-

a.) 32

b.) 64

c. ) 128

d.) 256


91.

Is two byte instruction-

a.) MOV A, B

b.) ANA B

c.) MV I B, 92 H

d.) LHLD 2050 H


92.

Banch instructions-

a. ) only uses flogs setting to make decision.

b. )only sets flogs according to results.

c. ) uses flogs settings as well as sets flogs setting

d. )nighteruse flog settings not set flogs.


93.

What will be the time delay achieved from following loop-

Loop DCX B 6

MOV A, C, 4

ORA B 4

JNZ Loop 10

system clock freg. = 2 MHz.

a. ) 10 m s

b.)12 m s

c.) 14 m s

d. )16 m s

94.

After execution of pop statement-

a. ) Stack pointer decremented by 2

b.) Stack pointer incremented by 2

c.) Stack pointer decremented by 1

d. )Stack pointer incremented by 1



95.

Labels are used as an alternative for-

a.) Data

b.) Register name

c.) Memory address

d) Stack pointer

96.

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


97. 00110010 – 01000101 =?

a.) 00010011

b. )11101101

c. )11100011

d. )11100100

98. When an array is possed as an argument to a function what exactly gets possed-

a.) Address of the array

b. )Values of elements of array

c.) Number of elements of array

d. )Address of the first element of the array

99. A write cycle time means-

a.) Minimum length of write pulse

b.) Minimum amount of time for which data must be valid before write pulse end

c.) Minimum time required between successive write operation

d.) Minimum time for which data must be valid after write pulse ends


100. If three i/p of a gate are 1, 0, 1 then output is O the gate must be-

a.) NOT

b.) AND

c.) OR

d. )NAND.

101. Inverting amplifier configuration using operational amplifier is –





102. Which logic family is most faster-

a.) ECL

b.) DCTL

c.) RTL

d) TTL

103. For getting positive o/p from two i/p OR gate for positive logic-

a.) both i/p must be positive

b.) both i/p must be negative

c.) any one of i/p must be positive

d.) undefined condition

104. Supercilious is –

a. )Harighty

b.) High brow

c.) Angry

d.) Inane.

105. Give the synonym of 'moribund'-

a.) Undertaking

b.) Burial

c.) Leather bound

d.) Dying

106. The convention was to end on May 13 with a month long break in between. What do the two prepositions indicate?

a.) Duration

b.) Time

c) Direction

d.) Position

107. According to the writer what influences our dreams-

a. )inner censorships

b.) the stories

c. )the tales

d) none.

108. Vaunted is –

a.) Unvanquished

b.) Fell.

c.)Belittled

d.) Exacting.


109. The sun rays falls vertically on -

a.) Tropics

b.) Doldrums

c.) Poles

d.) Equator

110. Trimurti is associated with -

a.) Ellora

b.) Ajanta

c.) Khajuraho

d.) Elephant caves

111. n which year did the congress adopt “Poorna Swaraj” or complete independence as its goal?

a.) 1930

b.) 1929

c.) 1928

d.) 1942

112. Director of CBI-

a.) D.C Sharma

b.) A. M Shrivastava

c.) P.C Sharma

d.) P.C Dole

113. Rajiv Gandhi khel Ratna award for the year 2001 goes to -

a.) P. gopichand

b.) P. T Usha

c.) Sachin Tendulkar

d.) Gurpreet Singh

114. During which time is vist to Mecca treated as Haj?

a.) Id-Ul-Fitr

b) Id-ul-Zuha

c. )Milad-un-Nabi

d.) Any time

115. Of the 109 known metals, how many occur in nature and how many are produced synthetically in particle accelerators!

a.) 79 and 10

b.) 80 and 29

c. )95 and 14

d.) None can be produced synthetically


116. Earth’s average speed per second around the sun is -

a.) 30 km

b. ) 32 km

c.) 34 km

d.) 35 km

117. Governor of Reserve Bank of India is -

a.) Bimal Jalan

b.) C. Ranga Rajan

c. )Rana Malhotra

d. )S. Venkata Ramanan
118. The first pope to enter a mosque in Damascus syria is -

a )Pope John Paul II

b.) Pope John Paul I

c.) Pope John Paul III

d. )Pope John Paul V

119. Uranium is found in the state of -

a.) Orissa

b.) A. P

c.) Karnataka

d. )Bihar


120. Nuclear Power plant in Pakistan is located at-

a. )Karachi

b.) Peshawar

c. )Ellipse

d.) Paraboloid



BSNL GE-JTO Recruitment Examination
Answers for Test Paper - VI
1. At a frequency below the resonant frequency series circuit is-
--Inductive
ClaunchersAnswer is :- b.) Capacitive
2. The electrical conductivity of metals is typically of the order of (Ohm –1 m-1) -
--18
ClaunchersAnswer is :- a.) 107
3. The output of a piezoelectric crystal has-
--Low amplitude and low impedance
ClaunchersAnswer is :- c. )Low amplitude and high impedance
4. The time constant associated with the capacitor charging in the circuit shown in the given figure is –

--6ms
ClaunchersAnswer is :- a. )6ms
5. The Q factor of an inductor would be higher if it is made of –
--Thinner wire-
ClaunchersAnswer is :- b.) Longer wire
6. A cavity resonator can be represented by –
--An LC circuit-
ClaunchersAnswer is :- a.) An LC circuit
7. Air gap in the iron core of an inductor prevents –
--Core saturation-
ClaunchersAnswer is :- a.) Core saturation
8. Between the plates of an air capacitor if a glass slab is slipped without moving the plate then -
-- Its capacitance is decreased-
ClaunchersAnswer is :- b.) Its capacitance is increased
9. For current to flow, a circuit must be –
--Isolated-
ClaunchersAnswer is :- c.) Complete
10. Human ear can detect sound intensities of the order of –
--10-20 w/m
ClaunchersAnswer is :- b). 10-13 w/m2
11. A FET operates on –
--Majority carriers only-
ClaunchersAnswer is :- a). Majority carriers only
12. An SCR can conduct for a full half cycle or any part of it –
--and continue conduction for other half cycle-
ClaunchersAnswer is :- b.) but blocks the conduction for other half cycle
13. In CRT aquadag carries -
--aqueous solution of graphite-
ClaunchersAnswer is :- a. )aqueous solution of graphite
14. From the following circuit, in order to obtain a 12-v stabilized supply the input to the terminals A and B
should be -

--less than 12v with terminal A positive with respect to terminal B-
ClaunchersAnswer is :- d. )greater than 12v with A positive with respect to B
15. When the value of ICBO in a silicon transistor of b = 49 is 20 Na then the value of ICEO for a temperature rise of 180c would be –
--8mA -
ClaunchersAnswer is :- a. )8mA
16. MOSFET can operate in –
--Depletion mode-
ClaunchersAnswer is :- d. )Both a & b
17. For a circuit design the very factor of an SCR, which is to be taken into account is –
--a-
ClaunchersAnswer is :-
18. The functions of an oxide layer in an IC device is to –
--mask against diffusion or ion implant-
ClaunchersAnswer is :- d.) all the above
19. One of the following bipolar transistors which has the highest current gain bandwidth product for similar geometry is –
--NPN germanium transistor-
ClaunchersAnswer is :- b.) NPN silicon transistor
20. With the increasing temperature, the electrical conductivity would –
--Increase in metals as well as in intrinsic semiconductors.-
ClaunchersAnswer is :- c. )Decrease in metals but increase in intrinsic semiconductors.
21. For the following circuit, the current X is 3A then the power delivered by the dependent current source D is –

--50 watts3-
ClaunchersAnswer is :- c. )1500 watts
22. The current in resistor R shown in the fig. will be –

--0.2A-
ClaunchersAnswer is :- a.) 0.2A
23. In the network shown in the given fig. the capacitor C1 is initially charged to a voltage V0 before the switch S in the circuit is closed. In the steady state-

--C1 and C2 are charged to equal voltages-
ClaunchersAnswer is :- a.)C1 and C2 are charged to equal voltages
24. The equivalent circuit of a wire-wound resistor can be represented as –
--a-
ClaunchersAnswer is :-
25. For the fig. shown the fundamental cutset for the branch 12 is –

--2, 1, -
ClaunchersAnswer is :- c. )2, 1, 3, 4,5
26. Ideally, attenuator pads should not change –
--voltage level-
ClaunchersAnswer is :- b.) impedance level
27. When the two networks are cascaded through an ideal Buffer and if tr1 and tr2 are the rise times of the two networks, then the overall delay of the two networks together will be –
--a-
ClaunchersAnswer is :-
28. For the network shown in the following fig. one of the following theorems which can be conveniently used to calculate the power consumed by the 10 resistor is –

--Thevenin's theorem-
ClaunchersAnswer is :- c.) Millman's theorem
29. The nodal analysis is primarily based on the application of –
--KVL-
ClaunchersAnswer is :- d.) Both b and c
30. When the driving point impedance of a network at a frequency of 1Hz is then the impedance can be realised as –
--a-
ClaunchersAnswer is :-
31. For a lossless line-
1. Series resistance is zero 2. Shunt conductance is zero
3. Shunt conductance is infinite 4. Series resistance is infinite
--1 & -
ClaunchersAnswer is :- a. ) 1 & 2
32. When a square wave is fed to an RC circuit then-
--Voltage across R is square and across C is not square-
ClaunchersAnswer is :- d. )Voltage across both R and C are not square
33. When an A.M. broadcast radio transmitter radiates 10 kw power when the modulation percentage is 60 then the power of the carrier is-
--5.00 kw-
ClaunchersAnswer is :- c.) 8.47 kw
34. The main components of atmosphere responsible for absorption of em waves are -
--Nitrogen and Oxygen-
ClaunchersAnswer is :- c.) Oxygen and water vapour
35. The effective height of a linear antenna of length ‘l’ is say ‘x’ when the current distribution along it’s length is uniform and say, it is ‘y’ when the current distribution is sinusoidal then x/y is equal to -
--2-
ClaunchersAnswer is :- d.) p/4
36. In a hollow rectangular waveguide, the phase velocity -
--Increases with increasing frequency-
ClaunchersAnswer is :- b.) Decreases with increasing frequency
37. For TM waves in a parallel plate waveguide, the minimum attenuation arising from imperfect conductors would occur at a frequency of (fc is the cut–off frequency )-
--3fc-
ClaunchersAnswer is :-
38. When a transmission line having 50 impedance is terminated in a load of ( 40 + j30) W then the VSWR is –
--j 0.-
ClaunchersAnswer is :- b.)0.8 + j 0.6
39. The ionosphere plays a significant role in radio wave propogation at-
--High frequencies-
ClaunchersAnswer is :- a. )High frequencies
40. When a carrier wave is modulated at 100% it’s power is increased by-
--100%-
ClaunchersAnswer is :- c. )50%
41. Reluctances in series are –
--Subtractive-
ClaunchersAnswer is :- b.) Additive
42. When the meters X and Y requires 40 mA and 50 mA respectively for full scale deflection then –
--X is more sensitive-
ClaunchersAnswer is :- c. )both are equally sensitive
43. In the context of ac bridge measurement the term "Wagner Ground" means –
--a special RC connection that eliminates stray magnetic effects.-
ClaunchersAnswer is :- d.) a special RC connection that eliminates stray capacitance effects.
44. The gating and counting circuits of a digital counter –
--cannot handle MHz signals-
ClaunchersAnswer is :- b.) cannot handle GHz signals
45. De- sauty bridge is more widely used because of –
--simplicity-
ClaunchersAnswer is :- a. )simplicity
46. A schottky diode clamp is used along with a switching BJT for –
--reducing the power dissipation.-
ClaunchersAnswer is :- b. )reducing the switching time
47. The phenomenon of creeping occurs in –
--Energy meters-
ClaunchersAnswer is :- a. )Energy meters
48. A permanent magnet moving coil measures the –
--true rms value-
ClaunchersAnswer is :- b.) dc value
49. The D`Arsonval meter movement can be converted into an audio frequency ac ammeter by adding to it a-
--thermocouple-
ClaunchersAnswer is :- b.) rectifier
50. Which one of the following detectors is generally used in ac bridges for audio frequency range ?
--Ac voltmeter-
ClaunchersAnswer is :- c. )Headphones
51. In single phase circuit capacitor used for power factor correction decreases –
--The power factor-
ClaunchersAnswer is :- d.) The line current and increases power factor
52. In the given figure X the balanced bridge should be –





ClaunchersAnswer is :- a.) A self-inductance having resistance
53. SiO2 layer in an integrated circuit provides –

--The power factor

ClaunchersAnswer is :- c. )Isolation
54. For an SCR with turn on time of 5 microsecond, an ideal trigger pulse should have-

---

ClaunchersAnswer is :- c. )short rise time with pulse width = 6 m sec
55. In a 3-phase half wave diode rectifier, the ratio of average output voltage to per phase maximum a c voltage is-

--

ClaunchersAnswer is :- b. )0.827
56. In multiple pulse modulation used in PWN inverters, the amplitude and frequency for triangular carrier and square reference signals are respectively 4V, 6 KH2 and 1V, 1KH2. The number of pulses per half cycle and pulse width is respectively-.
--
ClaunchersAnswer is :- b. )3, 450
57. A four quadrant operation requires-
--
ClaunchersAnswer is :- b.) two full converters connected back to back.
58. In voltage source inverters-
--
ClaunchersAnswer is :- c.) o does not depend on z where as depends on z
59. 59. For an RC driving – point impedance function, the poles and zeros----
ClaunchersAnswer is :- b.) should alternate only on the negative real axis
60. The functions of connecting a resistor in series with gate - cathode circuit and a zener diode across gate cathode circuit are, respectively to protect the gate circuit from-
---
ClaunchersAnswer is :- b. )over currents over voltages.
61. The plate efficiency of a class C amplifier is high because-
---
ClaunchersAnswer is :- c. ) The plate current flows only when grid is driven positive
62. The circuit diagram shown in the figure consist of transistor is -
---
ClaunchersAnswer is :- a. ) Parallel connection
63. Increase of current in one transistor in a direct coupled circuit -
---
ClaunchersAnswer is :- d. )May either increase or decrease currents of other transistors connected in the circuit.
64. In a PNP transistor the charge carriers in the base region which play an important role in the operation of the transistor are-
---
ClaunchersAnswer is :- b.) The minority carriers
65. Voltage gain in a CC amplifier is-
---
ClaunchersAnswer is :- a. )Cannot exceed unity
66. Random-access-memory means –
---
ClaunchersAnswer is :- a. )memory in a random fashion
67. BCD code is –
---
ClaunchersAnswer is :- b. )a binary code
68. The transfer function of a system is . The phase swift at w = 0 and w = a will be -

--
ClaunchersAnswer is :- a.) 900 and –00
69. Number of resolutions in a 8 bit D/A converter is –
---
ClaunchersAnswer is :- a. )8 bit
70. A bistable multivibrator is used as a –
--
ClaunchersAnswer is :- c.) Frequency divider
71. The transfer function of a system is The phase shift at w = o and w = will be –

--
ClaunchersAnswer is :- a. )900 and -00
72. A forward path transfer function of a unity feedback control system is equal to The unit step response of this system starting from rest will have its maximum value at a time equal to –
--
ClaunchersAnswer is :- d.) infinity.
73. To obtain the output position in a position control system, which one of the following transducers is used-
--
ClaunchersAnswer is :- c. )Synchro
74. The maximum resonance peak for the second order transfer function T(S) = will be –

--
ClaunchersAnswer is :-
75. Considering control system in the given fig .

For slight variation in G, the ratio of open loop sensitivity to closed pool sensitivity will be given by-
--
ClaunchersAnswer is :- b.) 1 : (1+GH)-1
76. The diversity system in Troposcatter links is made use of to-
--
ClaunchersAnswer is :- d.) Detect signal in the presence of fading.
77. Mark out wrong statement regarding compandor-
--
ClaunchersAnswer is :- c.) For weaker signals, it gives a poor ratio of signal strength to quantizing error.
78. In a communication system noice is most likely to affect the signal-
--
ClaunchersAnswer is :- b.) In the channel
79. In a communication system noice is most likely to affect the signal-
--
ClaunchersAnswer is :- b.) In the channel
80. The given circuit is a –

--
ClaunchersAnswer is :- a.) Monostable multivibrator
81. In a plane transverse electromagnetic wave-
--
ClaunchersAnswer is :- b.)Angle between electric and magnetic vectors is 900
82. Directional coupler is a function of-
--
ClaunchersAnswer is :- b.) Four port wove guide
83. Isolators are used to couple generator and load because –--
ClaunchersAnswer is :- b.) To match any load with generator
84. In travelling wave tube for getting amplified output -
--
ClaunchersAnswer is :- b.) Both electron beam and RF field travels in same direction
85. Crystal diode works on principle of –--
ClaunchersAnswer is :- c. )Square low
86. In gunn effect oscillator which mode having lowest operating frequency –--
ClaunchersAnswer is :- a. )Domain mode
87. In Reflex klystron maximum energy transferred to gap by electrons-
--
ClaunchersAnswer is :- d. )eR , ee, el
88. The radio waves get absorbed by atmosphere depends –--
ClaunchersAnswer is :- d.) Frequency of waves
89. 8085 mP has no of sets of communication lines-
--
ClaunchersAnswer is :- b.) 3
90. 8085 mP has no of sets of communication lines-
--
ClaunchersAnswer is :- b.) 3
91. Is two byte instruction-
---
ClaunchersAnswer is :- c.) MV I B, 92 H
92. Banch instructions-
--
ClaunchersAnswer is :- a. ) only uses flogs setting to make decision.
93. What will be the time delay achieved from following loop-
Loop DCX B 6
MOV A, C, 4
ORA B 4
JNZ Loop 10
system clock freg. = 2 MHz.
--
ClaunchersAnswer is :- b.)12 m s
94. After execution of pop statement-
---
ClaunchersAnswer is :- d. )Stack pointer incremented by 1
95. Labels are used as an alternative for-
---
ClaunchersAnswer is :- c.) Memory address
96. Microprogramming is a technique-
---
ClaunchersAnswer is :- c. )For programming the control steps of computer
97. 00110010 – 01000101 =?
---
ClaunchersAnswer is :- b. )11101101
98. A write cycle time means-
---
ClaunchersAnswer is :- a.) Minimum length of write pulse
99. A write cycle time means-
---
ClaunchersAnswer is :- a.) Minimum length of write pulse
100. If three i/p of a gate are 1, 0, 1 then output is O the gate must be-
---
ClaunchersAnswer is :- b.) AND
101. Inverting amplifier configuration using operational amplifier is –
--
ClaunchersAnswer is :-
102. Which logic family is most faster-
---
ClaunchersAnswer is :- a.) ECL
103. For getting positive o/p from two i/p OR gate for positive logic-
---
ClaunchersAnswer is :- c.) any one of i/p must be positive
104. Supercilious is –
---
ClaunchersAnswer is :- a. )Harighty
105. Give the synonym of 'moribund'-
---
ClaunchersAnswer is :- d.) Dying
106. The convention was to end on May 13 with a month long break in between. What do the two prepositions indicate?
---
ClaunchersAnswer is :- b.) Time
107. According to the writer what influences our dreams-
---
ClaunchersAnswer is :- a. )inner censorships
108. Vaunted is –---
ClaunchersAnswer is :- c.)Belittled
109. The sun rays falls vertically on -
---
ClaunchersAnswer is :- d.) Equator
110. Trimurti is associated with -
--
ClaunchersAnswer is :- d.) Elephant caves
111. In which year did the congress adopt “Poorna Swaraj” or complete independence as its goal?
--
ClaunchersAnswer is :- b.) 1929
112. Director of CBI-
--
ClaunchersAnswer is :- c.) P.C Sharma
113. Rajiv Gandhi khel Ratna award for the year 2001 goes to -
--
ClaunchersAnswer is :- a.) P. gopichand
114. During which time is vist to Mecca treated as Haj?
--
ClaunchersAnswer is :- b) Id-ul-Zuha
115. Of the 109 known metals, how many occur in nature and how many are produced synthetically in particle accelerators!
--
ClaunchersAnswer is :- c. )95 and 14
116. Earth’s average speed per second around the sun is -
--
ClaunchersAnswer is :- a.) 30 km
117. The first pope to enter a mosque in Damascus syria is -
---
ClaunchersAnswer is :- a )Pope John Paul II
118. . The first pope to enter a mosque in Damascus syria is -
---
ClaunchersAnswer is :- a )Pope John Paul II
119. Uranium is found in the state of -
---
ClaunchersAnswer is :- d. )Bihar
120. Nuclear Power plant in Pakistan is located at-
---
ClaunchersAnswer is :- c. )Ellipse

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