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Test Paper :8
Paper Type : Whole Testpaper
Test Location : BSNL JTO Exam 2005 - 4
Posted By : Jai






BSNL GE-JTO Recruitment Examination

Test Paper - IV

1.

Reactive current through the inductive load produces-

a) Magnetic field

b) Electric field

c) Super magnetic field

d) None
2.

When a piece of copper and another of germanium are cooled from room temperature to 800 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
3.

A capacitance transducer has two plates of area 5 cm2 each separated by an air gap of 2mm. Displacement sensitivity in pF /cm due to gap change would be -

a) 11.1

b) 44.2

c) 52.3

d) 66.3
4.

The critical angle in degrees, for an electromagnetic wave passing from Quartz (m = m0, Î=4Îo) into air is-

a) 15

b)30

c)45

d)90
5.

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 = -1; s = -3

c) s = 0; s = -1

d) s = -3; s = -4
6.

A capacitor used for power factor correction in single- phase circuit decreases –

a) the power factor

b) the line current

c) Both the line current and the power factor

d) the line current and increases power factor
7.

The unit of inductance is –

a) ohm

b) inductive reactance

c) inducta

d) Henry
8.

Which type of by-pass capacitor works best at high frequencies –

a) electrolytic

b) mica

c) ceramic

d) plexiglass
9.

The usual value of the surge impedance of a telephone line is –

a) 600 W

b) 500 W

c) 75 W

d) none
10.

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
11.

In an unbiased P-N junction thickness of depletion layer is of the order of –

a) 0.005 mm

b) 0.5 mm

c) 5 mm

d) 10-10 m
12.

One of the semiconductor device, which behaves like two SCRs is–

a) UJT

b) triac

c) JFET

d) MOSFET
13.

The following, which is not an advantage of semiconductor strain gauges as compared to conventional strain gauges, is –

a) excellent hysterists characteristics

b) least sensitive to temperature changes

c) high fatigue life

d) smaller size
14.

The fundamental ripple frequency of a half wave 3F rectifier with a 3F supply of frequency 50 Hz is –

a) 150 Hz

b) 50 Hz

c) 100 Hz

d) 250 Hz.
15.

For an FR biased PNP transistor –

a) base is negative with respect to emitter

b) collector is positive with respect to emitter

c) collector is a little more positive than base

d) base is a little less positive with respect to emitter than collector
16.

With normal operation of a JFET one can get IDss –

a) the maximum drain current

b) the minimum drain current

c) normal drain current

d) none
17.

An SCR is a semiconductor device made up of –

a) Four N type layers

b) Two P types and three N type layers

c) Two P type and two N type layers

d) Three P type and one N type layers
18.

For a UJT, if R1 = resistance from emitter to base 1, R2 = resistance from emitter to the base 2 and RBB = R1 + R2 then the intrinsic stand off ratio (h) is –

a)

b)

c)

d)
19.

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
20.

20 When the energy gap of a semiconductor is 1.1eV then it would be –

a) opaque to the visible light

b) transparent to the visible light

c) transparent to the infrared radiation

d) opaque to the infrared radiation
21.


The equivalent capacitance across ab will be –

d.0
22.

In the following fig. the power dissipated is maximum when the value of Rx is –

a) 33.4 K

b) 17.6 K

c) 10 K

d) 5 K
23.

The transfer function of a low pass RC network is –




24.

The total capacitance across points 'a' and 'b' in the given figure is –

a) 1.66 mF

b) 2.66 mF

c) 3.5 mF

d) 4.5 mF
25.

The load resistance needed to extract maximum power from the following circuit is –

a) 2W

b) 9W

c) 6W

d) 18W
26.

Which one of the following conditions for z parameters would hold for a two port network containing linear bilateral passive circuit elements –

a) z11 = z22

b) z12z21 = z11z22

c) z11z12 = z22z21

d) z12 = z21
27.

In the network shown, the switch is opened at t = 0. Prior to that, the network was in the steady state, Vs(t) at t = 0 is –

a) 0

b) 5V

c) 10V

d) 15V
28.

Which of the following statements are correct –

1. Tellegen's theorem is applicable to any lumped network

2. The reciprocity theorem is applicable to linear bilateral networks.

3. Thevenin's theorem is applicable to two terminal linear active networks.

4. Norton's theorem is applicable to two terminal linear active networks.

a) 1, 2 and 3

b) 1, 2, 3 and 4

c) 1, 2 and 4

d) 3 and 4
29.

Which one of the following transfer functions represents the critically damped system ?

30.

When the respective coil impedance of the circuit shown in the fig. is are Z1 = (5 + j8)W and Z2=(3+j8) then the input impedance of the circuit will be –

a) (8 + 16j)W

b) (2 + j0)W

c) (15 + 64j)W

d) (8 + 0j)W
31.

One of the following statement which is not correct -

a) In case of an antenna, the radiation resistance and loss resistance are not two different quantities.

b) The loss resistance includes loss by eddy currents, improper earth connections, insulation leakages etc) but not I2R losses

c) Radiation resistance varies directly as square root of the frequency

d) None of the above
32.

Ultraviolet radiation emitted when electron jumps from an outer stationary orbit to -.

a) first stationary orbit

b) second stationary orbit

c) third stationary orbit

d) fourth stationary orbit
33.

When the signal is propogated in a waveguide which has a full wave of electric intensity change between the two farther walls and no component of the electric field in the direction of propogation then the mode is –

a) TE11

b) TE10

c) TM22

d) TE20
34.

Consider the following statements pertaining to parabolic antenna -

1.It is commonly used above 1GHz

2. It get’s circularly polarized

3. It’s radiation pattern is highly directional

4. It’s radiation pattern is cardiod

of these statements-

a) 1,2 and 4 are correct

b) 1 and 3 are correct

c) 1,2 and 3 are correct

d) 2 and 4 are correct
35.

When a vertical dipole antenna is used in conjunction with a loop antenna for direction finding, then the field pattern obtained will be-








36.

When one end of a loss less transmission line of length 3/8 l and characteristic impedance R0 is short circuited and the other end is terminated in Ro then the impedance at l/8 away from the end terminated in R0 is-

a) Zero

b) R0

c) R0/2

d) Infinite
37.

For transmission of wave from a dielectric permittivity Î1 into dielectric medium of lower permittivity Î2 (Î1 > Î2) the critical angle of incidence Qc ( relative to the interface ) is given by -








38.

A transmission line has primary constants R, L, G and C and secondary constants Z0 and g (= a + jb) if the line is loss less then .





39.

The intrinsic impedance of a free space is-







40.

One of the following which is a low gain but omni directional antenna is-

a) discone

b) log-periodic

c) loop

d) helical
41.

Electronic voltmeters have –

a) high input impedance

b) low input impedance

c) zero input impedance

d) none
42.

Which of the following statement about impulse voltage is true ?

a) An impulse voltage is an unidirectional voltage.

b) In chopped impulse voltage, flashover does not occur.

c) Time taken to rise is exactly equal to the time taken to fall.

d) RMS value of impulse voltage is always less than 50% of average value.
43.

The precision of an instrument indicates its ability to reproduce a certain reading with a given –

a) drift

b) resolution

c) shift.

d) consistency
44.

In heterodyne digital conductor, the input signal is heterodyned to a –

a) higher frequency

b) lower frequency

c) both a and b)

d) none
45.

In a digital measuring device, if the input electrical signal is in the frequency range dc to fmax Hz, then it must be sampled at a rate of –

a) fmax times/sec

b) fmax times/ses

c) every 2fmax/sec

d) 2 fmax times/sec .
46.

Moving Iron intruments measures the rms value of –

a) a direct quantity

b) an alternating quantity

c) a virtual quantity.

d) none.
47.

One of the following intruments which is used almost exclusively to measure radio frequency current is-

a) Moving coil meter

b) Rectifier-type moving coil meter

c) Iron-vane meter

d) Thermocouple meter.
48.

A good ohmic contact on a p- type semiconductor chip is formed by introducing –

a) gold as an impurity below the contact

b) a high concentration of donors below the contract

c) a high concentration of acceptors below the contact

d) a thin insulator layer between the metal and semiconductor.
49.

The use of thermocouple meters for ac measurement leads to a meterscale which is –

a) linear

b) square law

c) logarithmic

d) exponential
50.

If low pressure of the order of 10-6mm of Hg is to be measure then the instrument of choice would be-

a) compound pressure gauge

b) thermocouple vacuum gauge

c) pirani gauge

d) ionization type vacuum gauge

In the given circuit if the power dissipated in the 6W resister is zero then V is –

a)





51.

The equivalent circuit of a resistor is shown in the given figure. The resistor will be non inductive if –

a)

b)

c)

d)

52.

SCR turns OFF from conducting state to blocking state on –

a) reducing gate current

b) reversing gate voltage

c) reducing anode current below holding current value

d) applying ac to the gate


53.

Static V-I characteristics of an SCR with different gate drives applied to the gate are indicated by-

a) I92 > I 91 > I 90

b) V92 > V91 > V90

c) P92 > P91 > P90

d) either a or b


54.

Each diode of a 3 phase, 6-pulse bridge diode rectifier conducts for-

a) 60o

b) 1200

c) 1800

d) 900

55.

A load, consisting of R = 10W and wL = 10W is being fed from 230 V, 50 Hz source through a 1 phase voltage controller. For a firing angle delay of 300 , the rms value of load current would be-

a) 23 A



56.

The total number of SCRs conducting simultaneously in a 3 phase full converter with overlap considered has the sequence of-

a) 3,3, 22

b) 3, 3, 3, 2

c) 3, 2, 3, 2

d) 2, 2, 2, 3


57.

A single phase voltage controller, using two SCRs in antiparallel is found to be operating as a controlled rectifier. This is because

a) load is R and pulse gating is used

b) load is R and high frquendy carrier gating is used

c) load is RL and pulse gating is used

d) load is RL and continuous gating is used


58.

The inverse Fourier Transform of





59.

In a GTO anode current begins to fall when gate current-

a) is negative peak at time t = 0

b) is negative peak at t = shortage period ts

c) just begins to become negative at t = 0

d) is negative peak at t = (ts + fall time)
60.

Power amplifiers and Audio use

a) Ferrite core

b) Air core

c) Solid iron core

d) Laminated iron core


61.

The amplifiers which are inserted at intervals amplify the signal and compensate for transmission less on the cable are called-

a) Line amplifiers

b) Equalizing amplifiers

c) Rep eaters

d) Compandors
62.

A solid state device named TRIAC acts as a ----- switch

a) 3 terminal unidirectional

b) 2 terminal unidirectional

c) 3 terminal bi-directional

d) 2 terminal bi-directional


63.

Identify the fastest logic circuit when speed of operation is concerned-

a) TTL

b) RTL

c) DTL

d) ATL


64.

An amplifier CE is characterized by-

a) Low voltage gain

b) Moderate power gain

c) Very high output impedance

d) Signal phase reversal


65.

The standard symbol for EX-OR gate is –

a) b)

c) d)

66.

Boolean algebra is based on –

a) numbers

b) logic

c) truth

d) symbols


67.

Magnetic amplifiers are used for –

a) voltage amplification

b) power amplification

c) current amplification

d) frequency amplification


68.

Number of resistors required for an N bit D/A converter in R-2R ladder D/A converter is-

a) 4N

b) 1N

c) 3N

d) 2N


69.

'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


70.

In a PID controlles the transfer function G(s) is





71.

A time invariant linear stable system is forced with an input x(t) = A sin wt under steady state conditions, the output Y(t) of the system will be –

a) A sin (wt + f), where f = tan-1|G(jw) |

b) A G (jw) | A sin [wt + G(jw)]

c) | G (jw) | A sin [2 wt + G (jw)]

d) | G (jw) A sin [wt + G (jw)]

x(t)-------G(s)---------y(t)


72.

Mark the 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 characterstic are linear.


73.

The gain phase plot of open loop transfer function of four different systems labelled A, B, C, and D

are shown in the figure. The correct sequence of the increasing order of stability of the four systems will be-

a) A, B, C, D

b) D, C, B, A

c) B, A, D, C,

d) B, C, D, A


74.

A unity feedback system has G(S) = . In the loot locus, the break away point occurs between

a) S = 0 and –1

b) S = -1 and ¥

c) S = -1 and –2

d) S =-2 and – ¥


75.

Twice in a year a few minute disturbance occurs in space communication during sun-blinding when --- are in line

a) Sun and satellite

b) Sun and earth station

c) Satellite and earth station

d) Sun, satellite and earth station
76.

The traffic handling capacity of an Earth station on the up link depends on-

a) It’s EIRP

b) Satellite antenna gain

c) Noise associated with the satellite

d) All of the above


77.

A supergroup pilot is –

a) applied at each multiplexing bay

b) used to regulate the gain of individual repeaters

c) applied at each adjustable equalizer

d) fed in at a GTE


78.

If the antenna diameter in a radar system is increased by a factor of 4, the maximum range will be increased by a factor of

a) Ö2

b) 2

c) 4

d) 8


79.

In the given circuit the capacitor C is almost shorted for the frequency range of interest of the input signal . Under this condition the voltage gain of the amplifier will be-

hfe = 100 hie = 1K –

a) 0.33

b) 0.5

c) 0.66

d) 1


80.

Microwave frequency bond is-

a) 30 MHz –300 MHz

b) 300 MHz –3 GHz

c) 300 MHz –10 GHz

d) 300 MHz – 30 GHz


81.

Directional couplers are designed as-

a) coupler of two-wave guide

b) measuring instrument to measure power of signal through wave-guide

c) director to the signal flow

d) None of the above


82.

Gyrator has a -

a) Phase difference of 1800 for transmission from port 1 to port 2 & no phase shift for transmission from port 2 to port 1

b) Phase difference of 1800 for transmission from port 1 to port 2 & no phase shift for transmission from port 1 to port 2

c)1800 phase difference for transmission from either port

d) 00 Phase difference for transmission from either port


83.

In klyrtron tube for getting oscillations-

a) electron beam travels & RF field remains stationary

b) both electron beam & RF field travels in same direction

c) both electron & RF field remains stationary

d) RF field travels & electron beam remains stationary


84.

The most noisy among below is –

a) IMPATT diode

b) Klyrtron

c) GUNN diode

d) TWT amplifier


85.

The GUNN mode of gunn effect oscillator is also called as –

a) Domain mode

b) Delayed domain mode

c) Quenched domain mode

d) LSA mode


86.

The total noise voltage across series ckt is –

a)

b)

c)

d)

87.

The vertical height of F1 layer in ionospheric layer is –

a) 180 km

b) 70 km

c) 110 km

d) 400 km


88.

8085 mP contains instruction in instruction set-

a) 64

b) 74

c) 246

d) 256


89.

If the clock freq. is 5 MHz how much time is required to execute on instruction 18 T-states-

a) 3.6 m sec)

b) 36 m sec)

c) 36 m sec)

d) 36 sec)


90.

In 8085 mP a word is equal to-

a) 8 bit

b) 16 bit

c) 32 bit

d) 64 bit
91.

The instruction used to set continuous loops-

a) JC

b) JMP

c) JP

d) JPE


92.

What happen when RET 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


93.

DMA is a process-

a) Interrupt data transfer.

b) high speed data transfer under control of microprocessor

c) high speed data transfer under control of DMA controller.

d) Interrupt data read


94.

No. of boolean function can be generated from 3 variables-

a) 4

b) 8

c) 16

d) 256


95.

The data storage in dynamic RAM is cell of-

a) capacitance

b) transistor

c) flip flop

d) transistor acting as capacitor


96.

What is 9’s complement of 23-

a) 76

b) 77

c) 78

d) 79

97.

An array is collection of -

a) different data type scattered throughout memory

b) same data type scattered throughout memory

c) same data type placed next to each other in memory

d) different data type placed next to each other in memory


98.

While reading from the memory location for active high i/p pins-

a) Read and chip select i/p must be at logical 0 level

b) Read at 0 and chip select at logical 1 level

c) Read at 1 and chip select at logical 0 level

d) Read and chip select i/p must be at logical 1 level


99.

When all i/p bits of AND gate are zero then o/p will be-

a) 0

b) 1

c) un-defined

d) none


100.

The fan out comparison between TTL logic and DRL logic is

a) Both logic having higher fan out

b) TTL logic having higher fan out than DRL logic

c) TTL logic having lower fan out than DRL logic

d) Both logic having lower fan out


101.

I was asked to perform the task of numbering points we had scored –

a) sad

b) said

c) tallow

d) strenous


102.

The taste is rancid as the rank is –

a) odour

b) look

c) smell

d) sound


103.

Troupe is a group of performers in a –

a) play

b) circus

c) cinema

d) orchestra


104.

Complete the sentence with correct alternative

He is --- well today-

a) no

b) none

c) not

d) nought


105.

Fritter is –

a) sour

b) chafe

c) dissipate

d) cancel


106.

The sun rays falls vertically on-

a) Tropics

b) Doldrums

c) Poles

d) Equator


107.

In India ‘Lotus’ award is given in the field of-

a) Literature

b) Films

c) Sports

d) Social Service


108.

The Chauri-Chaura incident is related to

a) A major offensive by underground revolutionaries

b) Large scale looting of government property by congress worker

c) Massive police firing on unarmed satyagrahis

d) the burning of a police post by a mob


109.

Dadamuni Ashok Kumar deceased on-

a) 10 December 2001

b) 20 December 2001

c) 10 January 2001

d) 20 January 2001


110.

The first batsman in Test history to aggregate 350 plus runs in a Test Match is-

a) Sanath Jaisurya

b) Brian Lara

c) Sachin Tendulkar

d) Steve Waugh


111.

Antibiotics which are effective against more than one type of bacteria are known as-

a) Surya drugs

b) Multibiotics

c) Broad-spectrum

d) Anti metabodies


112.

The books Sushrut Sanhita and Charak S anhita are related to-

a) Hindu rituals

b) Interpretation of Puranas

c) Interpretation of Vedas

d) Ayurvedic system of medicine


113.

An enzyme is a protein that -

a) Is used by the body as a food

b) Acts as an organic catalyst

c) Forms the hair and nails of the body

d) Make up the membranes of the cells


114.

Atal Behari Vajpayee was Prime Minister for 13 days in-

a) May 1996

b) June 1997

c) September 1996

d) July 2000


115.

RBI lowers the deposit rates ceiling for non banking finance companies from 14 percent to – percent per annum-

a) 12.5

b) 11.5

c) 10.5

d) 9.5


116.

Booker prize is won in the field of -

a) Science

b) Medicine

c) Fiction writing

d) Adventure


117.

Leprosy is caused by-

a) Bacterium

b) Virus

c) Protozoa

d) Helminthes


118.

Zojila is a pass between-

a) Kashmir valley and Ladakh

b) Lahaul valley and Spiti

c) Chumbi valley and Sikkim

d) Aurnachal Pradesh and Tibet


119.

Deforestation results in-

1. Flora destruction

2. Fauna destruction

3. Ecological misbalance

a) 1, 2 and 3

b) 1 and 3

c) 1 and 2

d) 2 and 3

-------------------------------------------------------------------
-------------------------------------------------------------------
ANSWERS

BSNL GE-JTO Recruitment Examination
Answers for Test Paper - V
1. Reactive current through the inductive load produces-
Your Answer is :-
Answer is :-a) Magnetic field
2. When a piece of copper and another of germanium are cooled from room temperature to 80 K then the resistance of -
Your Answer is :-
Answer is :-d) copper decreases and germanium increases
3. A capacitance transducer has two plates of area 5 cm2 each separated by an air gap of 2mm. Displacement sensitivity in pF /cm due to gap change would be -
Your Answer is :-
Answer is :-a) 11.1
4. The critical angle in degrees, for an electromagnetic wave passing from Quartz ( = 0, =4o) into air is-
Your Answer is :-
Answer is :-b)30
5. When an RC driving point impedance function has zeros at s= -2 and s=-5 then the admissible poles for the function would be –
Your Answer is :-
Answer is :-b) s = -1; s = -3
6. A capacitor used for power factor correction in single- phase circuit decreases –
Your Answer is :-
Answer is :-d) the line current and increases power factor
7. The unit of inductance is –
Your Answer is :-
Answer is :-d) Henry
8. Which type of by-pass capacitor works best at high frequencies –
Your Answer is :-
Answer is :-c) ceramic
9. The usual value of the surge impedance of a telephone line is –
Your Answer is :-
Answer is :-c) 75 W
10. Telemetering is a method of –
Your Answer is :-
Answer is :-c) transmitting information concerning a process over a distance
11. In an unbiased P-N junction thickness of depletion layer is of the order of –
Your Answer is :-
Answer is :-b) 0.5 mm
12. One of the semiconductor device, which behaves like two SCRs is–
Your Answer is :-
Answer is :-b) triac
13. The following, which is not an advantage of semiconductor strain gauges as compared to conventional strain gauges, is –
Your Answer is :-
Answer is :-b) least sensitive to temperature changes
14. The fundamental ripple frequency of a half wave 3F rectifier with a 3F supply of frequency 50 Hz is –
Your Answer is :-
Answer is :-a) 150 Hz
15. For an FR biased PNP transistor –
Your Answer is :-
Answer is :-a) base is negative with respect to emitter
16. With normal operation of a JFET one can get IDss –
Your Answer is :-
Answer is :-a) the maximum drain current
17. An SCR is a semiconductor device made up of –
Your Answer is :-
Answer is :-c) Two P type and two N type layers
18. For a UJT, if R1 = resistance from emitter to base 1, R2 = resistance from emitter to the base 2 and RBB = R1 + R2 then the intrinsic stand off ratio (h) is –
Your Answer is :-
Answer is :-d)
19. As the drain voltage is increased for a junction FET in the pinch off region then the drain current –
Your Answer is :-
Answer is :-d) remains constant
20. When the energy gap of a semiconductor is 1.1eV then it would be –
Your Answer is :-
Answer is :-a) opaque to the visible light to the infrared radiation
21. The equivalent capacitance across ab will be –

Your Answer is :-
Answer is :-
22. In the following fig. the power dissipated is maximum when the value of Rx is –

Your Answer is :-
Answer is :-c) 10 K
23. The transfer function of a low pass RC network is –
Your Answer is :-
Answer is :-
24. The total capacitance across points 'a' and 'b' in the given figure is –

Your Answer is :-
Answer is :-b) 2.66 F
25. The load resistance needed to extract maximum power from the following circuit is –

Your Answer is :-
Answer is :-c) 6W
26. Which one of the following conditions for z parameters would hold for a two port network containing linear bilateral passive circuit elements –
Your Answer is :-
Answer is :-c) z11z12 = z22z21
27. In the network shown, the switch is opened at t = 0. Prior to that, the network was in the steady state, Vs(t) at t = 0 is –

Your Answer is :-
Answer is :-b) 5V
28. Which of the following statements are correct –
1. Tellegen's theorem is applicable to any lumped network
2. The reciprocity theorem is applicable to linear bilateral networks.
3. Thevenin's theorem is applicable to two terminal linear active networks.
4. Norton's theorem is applicable to two terminal linear active networks.
Your Answer is :-
Answer is :-b) 1, 2, 3 and 4
29. Which one of the following transfer functions represents the critically damped system ?
Your Answer is :-
Answer is :-
30. When the respective coil impedance of the circuit shown in the fig. is are Z1 = (5 + j8) and Z2=(3+j8) then the input impedance of the circuit will be –

Your Answer is :-
Answer is :-d) (8 + 0j)W
31. One of the following statement which is not correct -
Your Answer is :-
Answer is :-d) None of the above
32. Ultraviolet radiation emitted when electron jumps from an outer stationary orbit to -.
Your Answer is :-
Answer is :-a) first stationary orbit
33. When the signal is propogated in a waveguide which has a full wave of electric intensity change between the two farther walls and no component of the electric field in the direction of propogation then the mode is –
Your Answer is :-
Answer is :-d) TE20
34. Consider the following statements pertaining to parabolic antenna -
1.It is commonly used above 1GHz
2. It get’s circularly polarized
3. It’s radiation pattern is highly directional
4. It’s radiation pattern is cardiod
of these statements-
Your Answer is :-
Answer is :-c) 1,2 and 3 are correct
35. When a vertical dipole antenna is used in conjunction with a loop antenna for direction finding, then the field pattern obtained will be-
Your Answer is :-
Answer is :-
36. When one end of a loss less transmission line of length 3/8  and characteristic impedance R0 is short circuited and the other end is terminated in Ro then the impedance at /8 away from the end terminated in R0 is-
Your Answer is :-
Answer is :-b) R0
37. For transmission of wave from a dielectric permittivity 1 into dielectric medium of lower permittivity 2 (1 > 2) the critical angle of incidence Qc ( relative to the interface ) is given by -
Your Answer is :-
Answer is :-
38. A transmission line has primary constants R, L, G and C and secondary constants Z0 and  (= a + jb) if the line is loss less then .
Your Answer is :-
Answer is :-
39. The intrinsic impedance of a free space is-
Your Answer is :-
Answer is :-
40. One of the following which is a low gain but omni directional antenna is-
Your Answer is:-
Answer is :-d) helical
41. Electronic voltmeters have –
Your Answer is :-
Answer is :-b) low input impedance
42. The precision of an instrument indicates its ability to reproduce a certain reading with a given –
Your Answer is :-
Answer is :-d) consistency
43. The precision of an instrument indicates its ability to reproduce a certain reading with a given –
Your Answer is :-
Answer is :-d) consistency
44. In heterodyne digital conductor, the input signal is heterodyned to a –
Your Answer is :-
Answer is :-b) lower frequency
45. In a digital measuring device, if the input electrical signal is in the frequency range dc to fmax Hz, then it must be sampled at a rate of –Your Answer is :-
Answer is :-d) 2 fmax times/sec .
46. Moving Iron intruments measures the rms value of –
Your Answer is :-
Answer is :-b) an alternating quantity
47. One of the following intruments which is used almost exclusively to measure radio frequency current is-
Your Answer is :-
Answer is :-d) Thermocouple meter.
48. A good ohmic contact on a p- type semiconductor chip is formed by introducing –
Your Answer is :-
Answer is :-b) a high concentration of donors below the contract
49. The use of thermocouple meters for ac measurement leads to a meterscale which is –
Your Answer is :-
Answer is :-b) square law
50. If low pressure of the order of 10-6mm of Hg is to be measure then the instrument of choice would be-
Your Answer is :-
Answer is :-c) pirani gauge
51.

In the given circuit if the power dissipated in the 6W resister is zero then V is –
Your Answer is :-
Answer is :-a)
52. The equivalent circuit of a resistor is shown in the given figure. The resistor will be non inductive if –


Your Answer is :-a
Answer is :-b)
53. SCR turns OFF from conducting state to blocking state on –
Your Answer is :-
Answer is :- c) reducing anode current below holding current value
54. Static V-I characteristics of an SCR with different gate drives applied to the gate are indicated by-
Your Answer is :-
Answer is :-a) I92 > I 91 > I 90
55. Each diode of a 3 phase, 6-pulse bridge diode rectifier conducts for-
Your Answer is :-
Answer is :-b) 1200
56. A load, consisting of R = 10 and L = 10 is being fed from 230 V, 50 Hz source through a 1 phase voltage controller. For a firing angle delay of 300 , the rms value of load current would be-
Your Answer is :-
Answer is :-
57. The total number of SCRs conducting simultaneously in a 3 phase full converter with overlap considered has the sequence of-
Your Answer is :-
Answer is :-c) 3, 2, 3, 2
58. A single phase voltage controller, using two SCRs in antiparallel is found to be operating as a controlled rectifier. This is because
Your Answer is :-
Answer is :-c) load is RL and pulse gating is used
59. The inverse Fourier Transform of

Your Answer is :-
Answer is :-
60. In a GTO anode current begins to fall when gate current-
Your Answer is :-
Answer is :-b) is negative peak at t = shortage period
61 Power amplifiers and Audio use
Your Answer is :-
Answer is :-d) Laminated iron core
62. The amplifiers which are inserted at intervals amplify the signal and compensate for transmission less on the cable are called-
Your Answer is :-
Answer is :-c) Rep eaters
63. A solid state device named TRIAC acts as a ----- switch
Your Answer is :-
Answer is :-c) 3 terminal bi-directional
64. Identify the fastest logic circuit when speed of operation is concerned-
Your Answer is :-
Answer is :-a) TTL
65. An amplifier CE is characterized by-
Your Answer is :-
Answer is :-d) Signal phase reversal
66. The standard symbol for EX-OR gate is –
Your Answer is :-
Answer is :-a)
67. Boolean algebra is based on –
Your Answer is :-
Answer is :-b) logic
68. Magnetic amplifiers are used for –
Your Answer is :-
Answer is :-b) power amplification
69. Number of resistors required for an N bit D/A converter in R-2R ladder D/A converter is-
Your Answer is :-
Answer is :-d) 2N
70. Not allowed' condition in NAND gate SR flip flop is –
Your Answer is :-
Answer is :-a) s = 0, R = 0
71. In a PID controlles the transfer function G(s) is
Your Answer is :-
Answer is :-
72. A time invariant linear stable system is forced with an input x(t) = A sin wt under steady state conditions, the output Y(t) of the system will be –
Your Answer is :-
Answer is :-d) | G (jw) A sin [wt + G (jw)] x(t)-------G(s)---------y(t)
73. Mark the wrong statement for two phase servo motor –
Your Answer is :-
Answer is :-b) The rotor resistance is low
74. The gain phase plot of open loop transfer function of four different systems labelled A, B, C, and D

are shown in the figure. The correct sequence of the increasing order of stability of the four systems will be-


Your Answer is :-

Answer is :-c) B, A, D, C,
75. A unity feedback system has G(S) = . In the loot locus, the break away point occurs between
Your Answer is :-
Answer is :-a) S = 0 and –1
76. Twice in a year a few minute disturbance occurs in space communication during sun-blinding when --- are in line
Your Answer is :-
Answer is :-d) Sun, satellite and earth station
77. The traffic handling capacity of an Earth station on the up link depends on-
-Your Answer is :-
Answer is :-d) All of the above
78. A supergroup pilot is –
Your Answer is :-
Answer is :-d) fed in at a GTE
79. If the antenna diameter in a radar system is increased by a factor of 4, the maximum range will be increased by a factor of
Your Answer is :-
Answer is :-c) 4
80. In the given circuit the capacitor C is almost shorted for the frequency range of interest of the input signal . Under this

condition the voltage gain of the amplifier will be-

hfe = 100 hie = 1K –









Your Answer is :-

Answer is :-d) 1
81. Microwave frequency bond is-
Your Answer is :-
Answer is :-c) 300 MHz –10 GHz
82. Directional couplers are designed as-
Your Answer is :-
Answer is :-b) measuring instrument to measure power of signal through wave-guide
83. Gyrator has a -
Your Answer is :-
Answer is :-a) Phase difference of 1800 for transmission from port 1 to port 2 & no phase shift for transmission from port 2 to port 1
84. In klyrtron tube for getting oscillations-
Your Answer is :-
Answer is :-a) electron beam travels & RF field remains stationary
85. The most noisy among below is –
Your Answer is :-
Answer is :-a) IMPATT diode
86. The GUNN mode of gunn effect oscillator is also called as –
Your Answer is :-
Answer is :-c) Quenched domain mode
87. The total noise voltage across series ckt is –
Your Answer is :-
Answer is :-a)
88. The vertical height of F1 layer in ionospheric layer is –
Your Answer is :-
Answer is :-c) 110 km
89. 8085 mP contains instruction in instruction set-
Your Answer is :-
Answer is :-a) 64
90. If the clock freq. is 5 MHz how much time is required to execute on instruction 18 T-states-
Your Answer is :-
Answer is :-a) 3.6 m sec)
91. In 8085 mP a word is equal to-
Your Answer is :-
Answer is :-b) 16 bit
92. The instruction used to set continuous loops-
Your Answer is :-
Answer is :-d) JPE
93. What happen when RET instruction executed -
Your Answer is :-
Answer is :-c) 16 bit address of instruction saved on stock.
94. . DMA is a process-
Your Answer is :-
Answer is :-b) high speed data transfer under control of microprocessor
95. No. of boolean function can be generated from 3 variables-
Your Answer is :-
Answer is :-d) 256
96. The data storage in dynamic RAM is cell of-
Your Answer is :-
Answer is :-a) capacitance
97. What is 9’s complement of 23-
Your Answer is :-
Answer is :-c) 78
98. An array is collection of -
Your Answer is :-
Answer is :-d) different data type placed next to each other in memory
99. While reading from the memory location for active high i/p pins-
Your Answer is :-
Answer is :-b) Read at 0 and chip select at logical 1 level
100. When all i/p bits of AND gate are zero then o/p will be-
Your Answer is :-
Answer is :-b) 1
101. The fan out comparison between TTL logic and DRL logic is
Your Answer is :-
Answer is :-d) Both logic having lower fan out
102. I was asked to perform the task of numbering points we had scored –
Your Answer is :-
Answer is :-c) tallow
103. The taste is rancid as the rank is –
Your Answer is :-
Answer is :-b) look
104. Troupe is a group of performers in a –
Your Answer is :-
Answer is :-c) cinema
105. Complete the sentence with correct alternative
He is --- well today-
Your Answer is :-
Answer is :-c) not
106. Fritter is –
Your Answer is :-
Answer is :-d) cancel
107. The sun rays falls vertically on-
Your Answer is :-
Answer is :-b) Doldrums
108. In India ‘Lotus’ award is given in the field of-
Your Answer is :-
Answer is :-b) Films
109. The Chauri-Chaura incident is related to
Your Answer is :-
Answer is :-a) A major offensive by underground revolutionaries
110. Dadamuni Ashok Kumar deceased on-
Your Answer is :-
Answer is :-b) 20 December 2001
111. The first batsman in Test history to aggregate 350 plus runs in a Test Match is-
Your Answer is :-
Answer is :-c) Sachin Tendulkar
112. Antibiotics which are effective against more than one type of bacteria are known as-
Your Answer is :-
Answer is :-d) Anti metabodies
113. The books Sushrut Sanhita and Charak S anhita are related to-
Your Answer is :-
Answer is :-b) Interpretation of Puranas
114. An enzyme is a protein that -
Your Answer is :-
Answer is :-a) Is used by the body as a food
115. Atal Behari Vajpayee was Prime Minister for 13 days in-
Your Answer is :-
Answer is :-a) May 1996
116. RBI lowers the deposit rates ceiling for non banking finance companies from 14 percent to – percent per annum-
Your Answer is :-
Answer is :-c) 10.5
117. Booker prize is won in the field of -
Your Answer is :-
Answer is :-a) Science
118. Leprosy is caused by-
Your Answer is :-
Answer is :-a) Bacterium
119. Zojila is a pass between-
Your Answer is :-
Answer is :-a) Kashmir valley and Ladakh
120. Deforestation results in-
1. Flora destruction
2. Fauna destruction
3. Ecological misbalance
Your Answer is :-
Answer is :-a) 1, 2 and 3

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