Test Location : BSNL JTO Exam 2005 - 4 ~ Career Launchers!!!

Test Paper :9

Paper Type : Whole Testpaper

Test Location : BSNL JTO Exam 2005 - 4

Posted By : Jai

BSNL GE-JTO Recruitment Examination

Test Paper - IV

Reactive current through the inductive load produces-

a) Magnetic field

b) Electric field

c) Super magnetic field

d) None
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
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
The critical angle in degrees, for an electromagnetic wave passing from Quartz (m = m_0, Î=4Î_o) into air is-

a) 15

b)30

c)45

d)90
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
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
The unit of inductance is –

a) ohm

b) inductive reactance

c) inducta

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

a) electrolytic

b) mica

c) ceramic

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

a) 600 W

b) 500 W

c) 75 W

d) none
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
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
One of the semiconductor device, which behaves like two SCRs is–

a) UJT

b) triac

c) JFET

d) MOSFET
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
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.
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
With normal operation of a JFET one can get I_Dss –

a) the maximum drain current

b) the minimum drain current

c) normal drain current

d) none
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
For a UJT, if R₁ = resistance from emitter to base 1, R₂ = resistance from emitter to the base 2 and R_BB = R₁ +R₂then the intrinsic stand off ratio (h) is –

a)

b)

c)

d)
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 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
The equivalent capacitance across ab will be –

d.0
In the following fig. the power dissipated is maximum when the value of R_x is –

a) 33.4 K

b) 17.6 K

c) 10 K

d) 5 K
The transfer function of a low pass RC network is –
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
The load resistance needed to extract maximum power from the following circuit is –

a) 2W

b) 9W

c) 6W

d) 18W
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
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
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
Which one of the following transfer functions represents the critically damped system ?
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
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
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
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
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
When a vertical dipole antenna is used in conjunction with a loop antenna for direction finding, then the field pattern obtained will be-
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 R₀is-

a) Zero

b) R₀

c) R₀/2

d) Infinite
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 -
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 .
The intrinsic impedance of a free space is-
One of the following which is a low gain but omni directional antenna is-

a) discone

b) log-periodic

c) loop

d) helical
Electronic voltmeters have –

a) high input impedance

b) low input impedance

c) zero input impedance

d) none
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.
The precision of an instrument indicates its ability to reproduce a certain reading with a given –

a) drift

b) resolution

c) shift.

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

a) higher frequency

b) lower frequency

c) both a and b)

d) none
In a digital measuring device, if the input electrical signal is in the frequency range dc to f_max Hz, then it must be sampled at a rate of –

a) f_max times/sec

b) f_max times/ses

c) every 2f_max/sec

d) 2 f_max times/sec .
Moving Iron intruments measures the rms value of –

a) a direct quantity

b) an alternating quantity

c) a virtual quantity.

d) none.
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.
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.
The use of thermocouple meters for ac measurement leads to a meterscale which is –

a) linear

b) square law

c) logarithmic

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

a)

b)

c)

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

a) I 91 > I 90 " name="G54" type="radio"> I₉₂> I ₉₁ > I ₉₀

b) V91 > V90 " name="G54" type="radio"> V₉₂ > V₉₁> V₉₀

c) P91 > P90 " name="G54" type="radio"> P₉₂ > P₉₁> P₉₀

d) either a or b
Each diode of a 3 phase, 6-pulse bridge diode rectifier conducts for-

a) 60^o

b) 120⁰

c) 180⁰

d) 90⁰
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
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
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
The inverse Fourier Transform of
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 t_s

c) just begins to become negative at t = 0

d) is negative peak at t = (t_s + fall time)
Power amplifiers and Audio use

a) Ferrite core

b) Air core

c) Solid iron core

d) Laminated iron core
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
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
Identify the fastest logic circuit when speed of operation is concerned-

a) TTL

b) RTL

c) DTL

d) ATL
An amplifier CE is characterized by-

a) Low voltage gain

b) Moderate power gain

c) Very high output impedance

d) Signal phase reversal
The standard symbol for EX-OR gate is –

a) b)

c) d)
Boolean algebra is based on –

a) numbers

b) logic

c) truth

d) symbols
Magnetic amplifiers are used for –

a) voltage amplification

b) power amplification

c) current amplification

d) frequency amplification
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
'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
In a PID controlles the transfer function G(s) is
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)
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.
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
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 – ¥
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
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
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
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
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-

h_fe = 100 h_ie = 1K –

a) 0.33

b) 0.5

c) 0.66

d) 1
Microwave frequency bond is-

a) 30 MHz –300 MHz

b) 300 MHz –3 GHz

c) 300 MHz –10 GHz

d) 300 MHz – 30 GHz
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
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
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
The most noisy among below is –

a) IMPATT diode

b) Klyrtron

c) GUNN diode

d) TWT amplifier
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
The total noise voltage across series ckt is –

a)

b)

c)

d)
The vertical height of F₁ layer in ionospheric layer is –

a) 180 km

b) 70 km

c) 110 km

d) 400 km
8085 mP contains instruction in instruction set-

a) 64

b) 74

c) 246

d) 256
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)
In 8085 mP a word is equal to-

a) 8 bit

b) 16 bit

c) 32 bit

d) 64 bit
The instruction used to set continuous loops-

a) JC

b) JMP

c) JP

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

a) 4

b) 8

c) 16

d) 256
The data storage in dynamic RAM is cell of-

a) capacitance

b) transistor

c) flip flop

d) transistor acting as capacitor
What is 9’s complement of 23-

a) 76

b) 77

c) 78

d) 79
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
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
When all i/p bits of AND gate are zero then o/p will be-

a) 0

b) 1

c) un-defined

d) none
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
I was asked to perform the task of numbering points we had scored –

a) sad

b) said

c) tallow

d) strenous
The taste is rancid as the rank is –

a) odour

b) look

c) smell

d) sound
Troupe is a group of performers in a –

a) play

b) circus

c) cinema

d) orchestra
Complete the sentence with correct alternative

He is --- well today-

a) no

b) none

c) not

d) nought
Fritter is –

a) sour

b) chafe

c) dissipate

d) cancel
The sun rays falls vertically on-

a) Tropics

b) Doldrums

c) Poles

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

a) Literature

b) Films

c) Sports

d) Social Service
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
Dadamuni Ashok Kumar deceased on-

a) 10 December 2001

b) 20 December 2001

c) 10 January 2001

d) 20 January 2001
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
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
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
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
Atal Behari Vajpayee was Prime Minister for 13 days in-

a) May 1996

b) June 1997

c) September 1996

d) July 2000
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
Booker prize is won in the field of -

a) Science

b) Medicine

c) Fiction writing

d) Adventure
Leprosy is caused by-

a) Bacterium

b) Virus

c) Protozoa

d) Helminthes
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
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 for Test Paper - V

1. Reactive current through the inductive load produces-
Your Answer is :-
ClaunchersAnswer 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 :-
ClaunchersAnswer 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 :-
ClaunchersAnswer is :-a) 11.1

4. The critical angle in degrees, for an electromagnetic wave passing from Quartz (m = m_0, Î=4Î_o) into air is-
Your Answer is :-
ClaunchersAnswer 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 :-
ClaunchersAnswer is :-b) s = -1; s = -3

6. A capacitor used for power factor correction in single- phase circuit decreases –
Your Answer is :-
ClaunchersAnswer is :-d) the line current and increases power factor

7. The unit of inductance is –
Your Answer is :-
ClaunchersAnswer is :-d) Henry

8. Which type of by-pass capacitor works best at high frequencies –
Your Answer is :-
ClaunchersAnswer is :-c) ceramic

9. The usual value of the surge impedance of a telephone line is –
Your Answer is :-
ClaunchersAnswer is :-c) 75 W

10. Telemetering is a method of –
Your Answer is :-
ClaunchersAnswer 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 :-
ClaunchersAnswer is :-b) 0.5 mm

12. One of the semiconductor device, which behaves like two SCRs is–
Your Answer is :-
ClaunchersAnswer 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 :-
ClaunchersAnswer 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 :-

ClaunchersAnswer is :-a) 150 Hz

15. For an FR biased PNP transistor –
Your Answer is :-
ClaunchersAnswer is :-a) base is negative with respect to emitter

16. With normal operation of a JFET one can get I_Dss –
Your Answer is :-
ClaunchersAnswer is :-a) the maximum drain current

17. An SCR is a semiconductor device made up of –
Your Answer is :-
ClaunchersAnswer 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 R_BB = R₁ +R₂then the intrinsic stand off ratio (h) is –
Your Answer is :-
ClaunchersAnswer 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 :-
ClaunchersAnswer is :-d) remains constant

20. When the energy gap of a semiconductor is 1.1eV then it would be –
Your Answer is :-
ClaunchersAnswer is :-a) opaque to the visible light to the infrared radiation

21. The equivalent capacitance across ab will be –

Your Answer is :-
ClaunchersAnswer is :-

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

Your Answer is :-

ClaunchersAnswer is :-c) 10 K

23. The transfer function of a low pass RC network is –
Your Answer is :-
ClaunchersAnswer is :-

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

Your Answer is :-
ClaunchersAnswer is :-b) 2.66 mF

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

Your Answer is :-
ClaunchersAnswer 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 :-
ClaunchersAnswer 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 :-
ClaunchersAnswer 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 :-

ClaunchersAnswer is :-b) 1, 2, 3 and 4

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

Your Answer is :-

ClaunchersAnswer is :-

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 –

Your Answer is :-

ClaunchersAnswer is :-d) (8 + 0j)W

31. One of the following statement which is not correct -
Your Answer is :-
ClaunchersAnswer is :-d) None of the above

32. Ultraviolet radiation emitted when electron jumps from an outer stationary orbit to -.
Your Answer is :-
ClaunchersAnswer 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 :-
ClaunchersAnswer 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 :-
ClaunchersAnswer 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 :-
ClaunchersAnswer is :-

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 R₀is-
Your Answer is :-
ClaunchersAnswer is :-b) R₀

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 -
Your Answer is :-
ClaunchersAnswer is :-

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 .
Your Answer is :-

ClaunchersAnswer is :-

39. The intrinsic impedance of a free space is-
Your Answer is :-

ClaunchersAnswer is :-

40. One of the following which is a low gain but omni directional antenna is-
Your Answer is:-
ClaunchersAnswer is :-d) helical

41. Electronic voltmeters have –
Your Answer is :-
ClaunchersAnswer 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 :-
ClaunchersAnswer is :-d) consistency

43. The precision of an instrument indicates its ability to reproduce a certain reading with a given –
Your Answer is :-
ClaunchersAnswer is :-d) consistency

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

Your Answer is :-
ClaunchersAnswer 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 :-
ClaunchersAnswer is :-d) 2 fmax times/sec .

46. Moving Iron intruments measures the rms value of –
Your Answer is :-
ClaunchersAnswer 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 :-
ClaunchersAnswer is :-d) Thermocouple meter.

48. A good ohmic contact on a p- type semiconductor chip is formed by introducing –
Your Answer is :-
ClaunchersAnswer 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 :-
ClaunchersAnswer 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 :-
ClaunchersAnswer 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 :-
ClaunchersAnswer 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
ClaunchersAnswer is :-b)

53. SCR turns OFF from conducting state to blocking state on –
Your Answer is :-
ClaunchersAnswer 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 :-
ClaunchersAnswer is :-a) I92 > I 91 > I 90

55. Each diode of a 3 phase, 6-pulse bridge diode rectifier conducts for-
Your Answer is :-
ClaunchersAnswer is :-b) 1200

56. 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-

Your Answer is :-

ClaunchersAnswer 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 :-

ClaunchersAnswer 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 :-

ClaunchersAnswer is :-c) load is RL and pulse gating is used

59. The inverse Fourier Transform of

Your Answer is :-

ClaunchersAnswer is :-

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

Your Answer is :-

ClaunchersAnswer is :-b) is negative peak at t = shortage period

61 Power amplifiers and Audio use
Your Answer is :-
ClaunchersAnswer 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 :-

ClaunchersAnswer is :-c) Rep eaters

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

Your Answer is :-

ClaunchersAnswer is :-c) 3 terminal bi-directional

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

Your Answer is :-

ClaunchersAnswer is :-a) TTL

65. An amplifier CE is characterized by-

Your Answer is :-

ClaunchersAnswer is :-d) Signal phase reversal

66. The standard symbol for EX-OR gate is –
Your Answer is :-
ClaunchersAnswer is :-a)

67. Boolean algebra is based on –
Your Answer is :-
ClaunchersAnswer is :-b) logic

68. Magnetic amplifiers are used for –
Your Answer is :-
ClaunchersAnswer 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 :-
ClaunchersAnswer is :-d) 2N

70. Not allowed' condition in NAND gate SR flip flop is –
Your Answer is :-
ClaunchersAnswer is :-a) s = 0, R = 0

71. In a PID controlles the transfer function G(s) is
Your Answer is :-
ClaunchersAnswer 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 :-
ClaunchersAnswer 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 :-
ClaunchersAnswer is :-b) The rotor resistance is low

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 :-

ClaunchersAnswer 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 :-
ClaunchersAnswer 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 :-
ClaunchersAnswer 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 :-
ClaunchersAnswer is :-d) All of the above

78. A supergroup pilot is –
Your Answer is :-
ClaunchersAnswer 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 :-
ClaunchersAnswer 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 :-

ClaunchersAnswer is :-d) 1

81. Microwave frequency bond is-
Your Answer is :-
ClaunchersAnswer is :-c) 300 MHz –10 GHz

82. Directional couplers are designed as-
Your Answer is :-
ClaunchersAnswer is :-b) measuring instrument to measure power of signal through wave-guide

83. Gyrator has a -
Your Answer is :-
ClaunchersAnswer 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 :-
ClaunchersAnswer is :-a) electron beam travels & RF field remains stationary

85. The most noisy among below is –
Your Answer is :-
ClaunchersAnswer is :-a) IMPATT diode

86. The GUNN mode of gunn effect oscillator is also called as –
Your Answer is :-
ClaunchersAnswer is :-c) Quenched domain mode

87. The total noise voltage across series ckt is –
Your Answer is :-
ClaunchersAnswer is :-a)

88. The vertical height of F1 layer in ionospheric layer is –
Your Answer is :-
ClaunchersAnswer is :-c) 110 km

89. 8085 mP contains instruction in instruction set-
Your Answer is :-
ClaunchersAnswer 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 :-
ClaunchersAnswer is :-a) 3.6 m sec)

91. In 8085 mP a word is equal to-
Your Answer is :-
ClaunchersAnswer is :-b) 16 bit

92. The instruction used to set continuous loops-
Your Answer is :-
ClaunchersAnswer is :-d) JPE

93. What happen when RET instruction executed -
Your Answer is :-
ClaunchersAnswer is :-c) 16 bit address of instruction saved on stock.

94. . DMA is a process-
Your Answer is :-
ClaunchersAnswer is :-b) high speed data transfer under control of microprocessor

95. No. of boolean function can be generated from 3 variables-
Your Answer is :-
ClaunchersAnswer is :-d) 256

96. The data storage in dynamic RAM is cell of-
Your Answer is :-
ClaunchersAnswer is :-a) capacitance

97. What is 9’s complement of 23-
Your Answer is :-
ClaunchersAnswer is :-c) 78

98. An array is collection of -
Your Answer is :-
ClaunchersAnswer 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 :-
ClaunchersAnswer 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 :-
ClaunchersAnswer is :-b) 1

101. The fan out comparison between TTL logic and DRL logic is
Your Answer is :-
ClaunchersAnswer 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 :-
ClaunchersAnswer is :-c) tallow

103. The taste is rancid as the rank is –
Your Answer is :-
ClaunchersAnswer is :-b) look

104. Troupe is a group of performers in a –
Your Answer is :-
ClaunchersAnswer is :-c) cinema

105. Complete the sentence with correct alternative
He is --- well today-
Your Answer is :-
ClaunchersAnswer is :-c) not

106. Fritter is –
Your Answer is :-
ClaunchersAnswer is :-d) cancel

107. The sun rays falls vertically on-
Your Answer is :-
ClaunchersAnswer is :-b) Doldrums

108. In India ‘Lotus’ award is given in the field of-
Your Answer is :-
ClaunchersAnswer is :-b) Films

109. The Chauri-Chaura incident is related to
Your Answer is :-
ClaunchersAnswer is :-a) A major offensive by underground revolutionaries

110. Dadamuni Ashok Kumar deceased on-
Your Answer is :-
ClaunchersAnswer 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 :-
ClaunchersAnswer is :-c) Sachin Tendulkar

112. Antibiotics which are effective against more than one type of bacteria are known as-
Your Answer is :-
ClaunchersAnswer is :-d) Anti metabodies

113. The books Sushrut Sanhita and Charak S anhita are related to-
Your Answer is :-
ClaunchersAnswer is :-b) Interpretation of Puranas

114. An enzyme is a protein that -
Your Answer is :-
ClaunchersAnswer is :-a) Is used by the body as a food

115. Atal Behari Vajpayee was Prime Minister for 13 days in-
Your Answer is :-
ClaunchersAnswer 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 :-
ClaunchersAnswer is :-c) 10.5

117. Booker prize is won in the field of -
Your Answer is :-
ClaunchersAnswer is :-a) Science

118. Leprosy is caused by-
Your Answer is :-
ClaunchersAnswer is :-a) Bacterium

119. Zojila is a pass between-
Your Answer is :-
ClaunchersAnswer is :-a) Kashmir valley and Ladakh

120. Deforestation results in-
1. Flora destruction
2. Fauna destruction
3. Ecological misbalance
Your Answer is :-
ClaunchersAnswer is :-a) 1, 2 and 3