Test Paper :13
Paper Type : Whole Testpaper
Test Location : BSNL JTO Exam 2005 - 8
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BSNL GE JTO-Recruitment Examination

Test Paper -VIII

1. When a inductive coil connected to a 200 V, 50Hz ac supply with 10A current flowing through it dissipates 1000 watts then which of the following will have least value in ohms-

a.) Resistance

b.) Reactance

c.) Impedance

d.) None


2.

Oscillator crystal are made of –

a.) Silicon

b.) Germanium

c.) Quartz

d.) None
3. For small size, high frequency coils, the most common core material is-

a. )Air

b. )Ferrite

c.) Powdered ion

d.) Steel
4.

If we have a parallel plate capacitor of plate area 'A' and plate separatoin t and having a capacity C and a metallic plate r of area A and of negligible thickness is introduced in the capacitor at a distance from either of the two plates as shown in the given figure then the capacity of the capacitor will become –

a.)

b.) C

c.) 2C

d.) 4C
5.

A superconductor is a –

a.) A material showing perfect conductivity and Meissner effect below a critical temperature

b.) A conductor having zero resistance

c.) A perfect conductor with highest di-magnetic susceptibility

d.) A perfect conductor which becomes resistance when the current density through it exceeds a critical value


6.

When an inductor tunes at 200 KHz with 624 pF capacitor and at 600 KHz with 60.4 pF capacitor then the self capacitance of the inductor would be –

a) 8.05 pF

b) 10.05pF

c.) 16.01pF

d.) 20.01pF
7.

Sparking occur when a load is switched off because the circuit has high –

a.) Inductance

b.) Capacitance

c.) Resistance

d.) None
8.

Sparking between contacts can be reduced by inserting a –

a.) Resistance in the line

b.) Capacitor in series with contacts

c.) Capacitor in parallel with contacts

d.) None
9.

RF amplifier of an A.M. receiver is normally biased in –

a.) Class 'A'

b.) Class 'b'

c.) Class 'C'

d.) None
10.

The value of gate voltage for the operation of enhancement of only N channel MOSFET has to be –

a.) High positive

b.) High negative

c.) Low positive

d.) Zero
11.

The input gate current of a FET is –

a.) a few microamperes

b.) negligibly small

c.) a few milliamperes

d.) a few amperes
12.

In the following fig. with R = 30k, the value of current through 2 K resistor is –

a.) 25 mA

b.) 40 mA

c.) 25/16 mA

d.) 10 mA
13.

A step recovery diode –

a.) has on extremely short recovery time

b.) conducts equally well in both directions

c.) is mainly used as a harmonic generator

d.) is an ideal rectifiers of high frequency signals
14.

In order to get maximum undistorted output signal from CE amplifier with VCC 10V, the value of VCE (Q) should be approximately-

a.) 0.1V

b.) 5V

c.) 10V

d) V
15.

In a FET the electrode, which corresponds to collector in bipolar transistor, is –

a.) source

b.) drain

c.) gate

d.) none
16. The device which acts like an NPN and a PNP transistor connected base to base and emitter to collector is –

a.) Triac

b.) UJT

c.) Diac

d.) SCR
17.

A typical optical fibre has –

a.) High refractive index core and low refractive index cladding

b.) Low refractive index core and high refractive index cladding

c.) Both a and b

d.) None
18.

In the following figure circuit diagram of an op-amp based is shown. The ratio is equal to –

a.) 9

b.) 11

c.) 10

d.) 21
19. When a loud speaker is connected across the terminals A and B of the network shown in the fig. then its impedance to obtain maximum power dissipation in it will be –

a.) 3 – j1

b.) 3 + j9

c.) 7.5 + j 2.5

d.) 7.5 – j 2.5
20. In the lattice network, the value of R for the maximum power transfer to the load –

a.) 5

b.) 6.5

c.) 8

d.) 9
21. For a lossy transmission line short circuited at the receiving end, the input impedance is given by (Z0 is the characteristic impedance, Ö is the propagation constant and l is the length of the line-

a.) Z0 cot h Öl

b.) Z0 cot Öl

c.) Z0 tan h.Ö l

d.) Z0 tan Öl
22. The approximate thickness of the radome wall should be –

a.) l

b.) l/4

c.) l/2

d.) l/8
23. A relatively permanent information is stored in

a. ) ROM

b.) RAM

c.) PROM

d.) Volatile memory


24. The rise time of the RC network shown in the given figure is approximately equal to –

b.) RC

c.) 2RC

d.) 4RC
25. If in the network shown in the fig. initially a steady state is attained by closing the switch 's' and then if the switch is opened at t = 0, then the current i(t) through the inductor will be –

a.) cos50tA

b.) 2A

c.) 2cos100tA

d.) 2sin50tA
26. When the p network of figure – I and T-network of figure – II are equivalent then the values of R1, R2 and R3 will be respectively –

a) 9W, 6W and 6W

b.) 6W, 6W and 9W

c.) 9W, 6W and 9W

d.) 6W, 9W and 6W
27. When the impedance matrices of a two port networks are given by and , then if these two networks are connected in series then the impedance matrix of the resulting two-port network will be –

d.) indeterminate
28. Joule/coulomb is the unit of -

a.) Electric field potential

b.) Potential

c .) Charge

d.) None of the above
29. The electric field line and equipotential lines-

a.) Are parallel to each other

b.)Are one and same

c.) Cut each other orthogonally

d.)Can be inclined to each other at any angle
30. For a lossy transmission line short circuited at the receiving end, the input impedance is given by (When Z0 is the characteristic impendence g is the propagation constant and L is the length of the line

31. When two equal positive point charges are placed along X- axis at X1 and –X1 respectively then the electric field vector at a point P on the positive Y-axis will be directed-

a.) In the +x direction

b.) In the –x direction

c. ) In the +y direction

d.) In the –y direction
32. The directions of and in TEM mode transmission line with respect to the direction of propagation are-

a.) Both and are transverse to the direction of propagation

b.) is and are transverse and h has a component in the direction of propagation

c.) is entirely transverse and has a component in the direction of propagation

d. ) is entirely transverse and has a component in the direction of propagation
33. The lowest TM mode in a rectangular waveguide of cross –section a x b with a>b will be-

a.) TM01

b.)TE10

c.) TM112

d.)TE11


34. When a transmitter in a free space radiates a mean power of ‘p’ watts uniformly in all directions then at a distance d sufficiently far from the source in plane the electric field E should be related to p and d as –



35. . When a dipole antenna was radiating with some excitation in free space radiating a certain amount of the power v if then this antenna is immersed in a lake where water is non-dissipative but has a dielectric constant of 81, then the radiated power with the same excitation will be

a.) Decrease to finite non-zero value

b.)Remain the same

c. )Increase

d.)Decrease to zero
36. When a (75 – j40)W load is connected to a coaxial line of Z0 = 75 W at 6MHz then the load matching on the line can be accomplished by connecting-

a.) A short – circuited stub at the load

b.)An inductance at the load

c. )A short circuited stub at a specific distance from the load

d.)none of the above
37. As compared to analog multimeters, digital multimeters are –

a.) less accurate

b.) more accurate

c.) equally accurate

d.) none.
38. When a signal of 10 mV at 75 MHz is to be measured then which of the following instruments can be used –

a.) VTVM

b.) Cathode ray oscilloscope

c.) Moving iron voltmeter

d.) Digital multimeter
39. Which of the following statement is true about two wattmeter method for power measurement in three phase current ?

a.) power can be measured using two wattmeter method only for star connected three phase circuits.

b.) when two meter show indentical readings, in the power factor is 0.5.

c.) when power factor is unit, one of the wattmeter reads zero

d.) when the reading of the two wattmeters are equal but of opposite sign, then the power factor is zero –
40. When a capacitance transducer has two plates of area 5cm2 each, separated by an air gap of 2mm than the displacement sensitivity in pf/cm due to gap change would be –

a.) 11.1

b.) 44.2

c.) 52.3

d.) 66.3
41. The Q of a radio coil –

a.) is independent of frequency

b.) increases monotonically as frequency increases

c.) decreases monotonically as frequency increases

d.) increases upto a certain frequency and then decreases beyond that frequency
42. When a generator of internal impedance and operating at 1GHz feeds a load via a coaxial line of characteristic impedance 50 ohm then the voltage wave ratio on the feed line is –

a.) 0.5

b.) 1.5

c.) 2.5

d.) 1.75
43. The coding system typically used in digital telemetry is –

a.) PPM (pulse position modulation)

b.) PAM (pulse amplitude modulation)

c.) PCM (pulse code modulation)

d.) PDM (pulse duration modulation)
44.

Radiation pyrometers are used for the measurement of temperature in the range of –

a.) -2000C to 5000C

b.) 00C to 5000C

c.) 5000C to 12000C

d.) 12000C to 25000C
45.

In the given figure band structure is shown. It is of –

a.) Gallium Avesenide (GaAs)

b.) Silicon (Si)

c.) Copper (Cu)

d.) Germanium (Ge)
46.

When anode is positive with respect to cathode in an SCR, the numbers of blocked p-n junction is –

a.) 1

b.) 2

c.) 3

d.) 4
47.

The circuit symbol for a GTO is

a. b.

c. d.




48. In the given fig. mark out the type of Cyclo converters

a.) 1 phase to 1 phase with continuous conduction

b.) 1 phase to 1 phase with discontinuous conduction

c.) step up device

d.) 3 phase to 1 phase device



In the given fig. A-1, C=5, m H and C=20 m F, C is initially charged to 200 V. After the switch.

S is closed at t = 0 the

maximum value of current and the

time at which it reaches this value are respectively.

a.) 400 A, 15.707 mS
49. b.) 50 A, 30 mS

c.) 100 A, 62.828 mS

d.) 400 A, 31.414 mS


50. 50. In the given circuit the maximum current in the main SCR M can be-

a.) 200 A

b.) 170.7 A

c.) 141.4 A

d.) 70.7 A


51. The transfer function of an amplifier is given by

The high 3-db frequency of the amplifier will approximately

a.) 5850 KHZ

b.)585 KHZ

c.) 5850 HZ

d.)585HZ


52. In comparison to full wave rectifier with two diodes the four divide bridge rectifier has the dominant advantage of -

a). Higher current carrying

b.)Lower ripple factor

c.) Higher efficiency

d.)Lower peak increase voltage require


53. Power output increase in a class-c amplifier-

a.) If the conduction angle decrease

b).If the conduction angle increase

c.) Are not governed by the conduction angle

d.)None of the above
54. A transistor with hie = 1.5 k and hfe = 75 is used in an emitter follower circuit where R1 and R2 are used for normal biasing . Approximate value of it’s current amplification is-

a.)75

b.)76

c.)75/76

d.)-75
55. Amplifier of class B has high theoretical efficiency of 78.5 percent because-

a.) It is biased almost to saturation

b.)Its quiescent current is low

c.)It’s output is an exact replica of it’s input

d.)It is biased well below cut off
56. The coupling that produces minimum interference with frequency response is-

a.) Direct coupling

b.)Impedance coupling

c.) R C coupling

d.)Transformer coupling
57. In the circuit shown in the given figure Rf provides

a.) Current series feedback

b.)Current shunt feedback

c.) Voltage series feedback

d.)Voltage shunt feedback
58. Mark the correct relation for the junction transistor


59. Data in the serial form can be converted into parallel form by using –

a.) PISO shift register

b.) SOIP shift register

c.) SIPO shift register

d.) POIS shift register
60. PROMs are used to store-

a.) bulk information

b.) information to be accessed rarely

c.) sequence information

d.) relatively permanent information
61. The horizontal axis in a 3 bit unipolar D/A converter represents-

a.) Output bit combination

b.) analog output voltage

c.) input bit combination

d.) none of the above
62. 'Not allowed' condition in NAND gate SR flip flop is –

a.) s = 0, R = 0

b.) s = 1, R = 1

c.) s = 0, R = 1

d.) s = 1, R = 0
63. Name the fastest logic family-

a) TTL

b.) RTL

c.) DCTL

d.) ECL
64. Equation corresponding to De Morgan's theorem in Boolean Algebra is –

a.) (A+B) (A+B) = AA + AB + BA + BB

c.) A + AB = A

d.) None of the above
65. In the given fig find radix of the system –

a.) 2
b.) 4

c.) 6

d.) 8


66. Modems are used for data transmission telephone lines to –

a.) increase the transmission capacity

b) improve noice performance

c.) incorporate error control coding

d.) eliminate dc component in the transmitted signal
67. The figure of a control system is shown. The maximum value of gain K for which the system is stable is-

a.)

b.) 3

c.) 4

d.) 5
68. Identify the example of open-loop system-

a.) A windscreen wiper

b.) Aqualung

c.) Respiratory system of an animal

d.) A system for controlling Anti-rocket missiles.
69. Consider the following expressions indicating the step or impulse response of an initially relaxed control system-

1. (5 – 4e-2+) u(t)

2. (e-2t +5) (u(t))

3 .V(t) + 8e-2t u(t)

4 . V(t) + 4e-2t 4(t)

Those which correspond to the step and impulse response of the same system include-

a.) 1&3

b.) 1&4

c.) 2&4

d.) 1&4


70. A system is described by

To test its stability by Lyapunov’s method the following V functions are considered.

Mark the most suitable V-function in this case-

a.) Only V1

b.) Only V2

c.) Both V1 and V2

d.) Neither V1 nor v2


71. Identity the polar plot of a typical type zero system with open loop transfer function


72. The scattering matrix of a magic –tee shown in the given figure is-







73. Which is the following relate to rational transfer function of a system-

1. Ratio of Fourier transform of output to input with zero initial conditions.

2. Ratio of Laplace transform of output to input with zero initial conditions.

3. Laplace transform of system impulse response.

4. Laplace transform of system unit step response select the correct answer using the codes given below.

Codes

a.) 1 and 4

b.) 2 and 3

c.) 1 and 3

d.) 2 and 4
74. For the signal g (t) – 10 cos (50 pt) cos2 (150at)

The Nyquist sampling state in t seconds is

a.) 150 samples per second

b.) 200 samples per second

c.) 300 samples per second

d.) 350 samples per second
75. In the case of a 70 MHz 1F carries for a transponder band width of 36 MHz; energy must lie between – MHz.

a.) 34 and 106

b.) 52. And 88

c.) 106 and 142

d.) 34 and 142
76. Radar used to eliminate clutter in navigational application is –

a.) Pulse radar

b.) Tracking radar

c.) MTI radar

d.) Mono pulse radar
77. The 1.55 mm windows is not yet in use with fiber optic systems because –

a.) The attenuation is higher than at 0.85 mm

b) The attenuation is higher than at 1.3mm

c.) Suitable laser devices have not yet been developed

d.) It does not lend itself to wavelength multiplexing
78. Pre-emphasis in FM systems involves-

a.) Compression of the modulating signal

b.) Expansion of the modulating signal

c.) Amplification of lower frequency components of the modulating signal.

d.) Amplification of higher frequency components of the modulating signal.
79. In a terrestrial microwave system transmission of signals is achieved through-

a.) reflection from the ionosphere

b.) line of sight mode

c) reflection from the ground

d.) diffraction from the stratosphere.


80. Casse grain feed is used with a parabolic reflector to

a.) increase the gain of the system

b). increase the bandwidth of the system

c.) reduce the size of the main reflector

d.) allow the feed to be placed at a convenient point.


81. In most microwave communication link rain drop attenuation is caused due to-

a.) scattering of microwaves by water drops of specific size.

b) scattering of microwaves by a collection of droplets acing as a single body.

c.) absorption of microwaves by water and consequent heating of the liquid

d.) absorption of the microwaves by water vapor in the atmosphere.


82. Circuit in the given figure represents. –

a.) an astable multivibrator

b.) A monostable multivibrator

c.) Voltage controlled oscillator

d.) Ramp generator


83. . . D = r is-

a.) Maxwell's 1st equation

b.) Maxwell's II equation

c.) Maxwell's III equation

d.) Maxwell’s IV equation


84. In a rectangular wave-guide which TM mode exists-

a.) TM00

b.) TM01

c.) Tm10

d.) TM11


85. In directional coupler a portion of power two velliry fram port 1) to port 2) is coupled to.

a). port 4

b). port 3

c.) port 2.

d.) port 3 & 4.


86.

For high power i.e. 10 w to 50 kw measurement –

a.) Barometer are used

b.) Thermisters are used

c.) Calorimetric technique

d.) Calorimetric watt meter technique used
87.

The difference between TWT & klystron is –

a.) In TWT electrons are in contact with RF field for long time & in klystron for short time

b.) In klystron electrons are in contact with RF field for long time & in TWT for short time

c.) In klystron there is no contact in RF field & electrons while in TWT there is contact

d.) In TWT phase is no contact is RF field & electrons while in klystron there is contact
88.

Which one is most suitable for transmission through wave guide-

a.) Hown antennas

b.) Bioconical antennas

c.) helical antenna

d. )Discone
89.

The skip distance of microwave is given by –

a.)

b. )

c.)

d.)
90.

How many general purpose registers 8085mp-

a.) 4

b.) 6

c.) 8

c.) 10
91.

8085 mP has no. of addressing modes-

a.) 2

b.) 3

c.) 4

d.) 5
92.

What will be status of z and c y flag after execution of SUB A instruction

a.) z = 0, cy = 0

b.) z = 0, cy = 1

c.) z = 1, cy = 0

d.) z = 1, cy = 1


93.

Microprocessor accept interrupt only if.

a.) interrupt flip flop disabled.

b.) when INTA signal is low.

c. ) interrupt flip flop enabled.

d.) none of above.
94.

Microprogramming is a technique

a.) for programming the microprocessor

b.) for writing small programs efficiently

c.) for programming the control steps of computer

d.) for programming o/p / i/p
95. High level programs like C are converted into machine language with the help of

a.) interpreter

b.) compiler

c.) operating

d.) system
96. (10110011)2 = (?)8

a.) 253

b.) 263

c.) 273

d.) 283
97. A Not gate at the output of AND gate converts AND gate into-

a.) NAND

b.) NOR

c.) AND

d.) NOPE.
98. The O/P of a logic gate is the gate must be-

a.) AND

b.) OR

c.) NAND

d.) X-OR
99. A symbol of JK flip flop is-


100. A demultiplener-

a.) has multiple i/p and single o/p

b.) has multiple i/p and multiple o/p

c.) has multiple i/p and multiple o/p

d.) has single i/p and single o/p
101. . Which of the following best describes the authour`s attitude toward fairy tales ?

a.) fascination

b.) open approval.

c.) Indulgent tolerance.

d.) Scornful.
102. What type of sentence is this ?

Hurray! We won the match

a.) Exclamatory

b.) assertive

c.) Negative

d.) Affirmative
103. Before which of the following word will you put 'a'

a.) hour

b.) M. A.

c.) Umbrella

d.) Man
104. The noun form of 'fresh' is –

a.) freshly

b.) freshen

c.) fresheners

d.) fresh itself
105. The word 'clang' is an example of –

a.) Simile

b.) inversion

c.) onomatopoeia

d.) irony
106. The Forbes magazine acclaimed Azim Premji as richest India's is the chairman of-

a.) Pentafour software

b) Infosys

c.) IBM

d.) Wipro
107. Bharat Ratna award for the year 2001 goes to-

a.) Lata Mangeshkar and Zakeer Hussain

b.) Zakeer Hussain and Bismillah Khan

c.) Bismillah Khan and Lata Mangeshkar

d.) Lata Mangeshkar and Ustad Amzad Ali Khan
108. Mr. George W-Bush takes over as ------ President of the united states of America succeeding Mr. Bill Clinton-

a.) 42nd

b.) 43rd

c.) 40th

d.) 45th
109. New Chief Minister of Pondicherry is-

a.) T. Venkat Naidu

b.) K. Hari Harh

c.) N. Rengaswany

d.) M. Mudliar
110. No court has the jurisdiction to interfere with the election process once set in motion by the Election commission. This is enshrined in Article-

a.) 311

b.) 329

c.) 356

d.) 365
111. Ostrich is a-

a.) Running bird

b.) Flying bird

c) Swimming bird

d.) Migratory bird
112. The main atmospheric gas responsible for green house is-

a.) Oxygen

b.) Nitrogen

c.) Ozone

d.) Carbon-dioxide
113. Which of the following is not a Kharif Crop-

a.) Rice

b.) groundnut

c.) Sugarcane

d.) gram
114. The function of World Bank is to-

a.) Help in reconstruction and development of world economy

b.) Facilitate poor countries to trade on concessional rates

c.) Promote growth of international trade and equilibrium in balance of payments

d.) Ease trade barriers and establish rule of fair trade
115. Speed of sound is maximum in-

a. )Water

b.) Air

c.) Steel

d.) Vacuum
116. “Long years ago we made a trust with destiny.” Whose words are these-

a.) Subhash Chandra Bose

b.) Jawaharlal Nehru

c.) Lajpat Rai

d.) Bhagat Singh
117. Durand cup is associated with-

a.) Hockey

b.) Tennis

c.) Football

d.) Badminton
118. Rabindranath Tagore was awarded the Nobel Prize in literature in the year.

a.) 1908

b.) 1910

c.) 1913

d.) 1914
119. India successfully conducted its first underground nuclear experiment at Pokhran in Rajas than on-

a.) May 18, 1975

b.) May 20, 1974

c) May 17, 1974

d.) May 17, 1974
120. An emergency loan of $ 500 million to help reconstruct infrastructure in earth quake devastated Gujarat approved by-

a.) Asian development Bank

b.) World Bank

c.) Swiss Bank

d.) Reserve Bank of India

BSNL GE-JTO Recruitment Examination
Answers for Test Paper - VIII
1. When a inductive coil connected to a 200 V, 50Hz ac supply with 10A current flowing through it dissipates 1000 watts then which of the following will have least value in ohms-
Your Answer is :-Resistance
ClaunchersAnswer is :-a.) Resistance
2. Oscillator crystal are made of –
Your Answer is :-Silicon
ClaunchersAnswer is :-c.) Quartz
3. For small size, high frequency coils, the most common core material is-
Your Answer is :-Air
ClaunchersAnswer is :-a. )Air
4. If we have a parallel plate capacitor of plate area 'A' and plate separatoin t and having a capacity C and a metallic plate r of area A and of negligible thickness is introduced in the capacitor at a distance from either of the two plates as shown in the given figure then the capacity of the capacitor will become –

Your Answer is :-a
ClaunchersAnswer is :-c.) 2C
5. A superconductor is a –
Your Answer is :-A material showing perfect conductivity and Meissner effect below a critical temperature
ClaunchersAnswer is :-a.) A material showing perfect conductivity and Meissner effect below a critical temperature
6. When an inductor tunes at 200 KHz with 624 pF capacitor and at 600 KHz with 60.4 pF capacitor then the self capacitance of the inductor would be –
Your Answer is :-8.05 pF
ClaunchersAnswer is :-b) 10.05pF
7. Sparking occur when a load is switched off because the circuit has high –
Your Answer is :- Inductance
ClaunchersAnswer is :-a.) Inductance
8. Sparking between contacts can be reduced by inserting a –
Your Answer is :-Resistance in the line
ClaunchersAnswer is :-c.) Capacitor in parallel with contacts
9. RF amplifier of an A.M. receiver is normally biased in –
Your Answer is :-Class 'A'
ClaunchersAnswer is :-c.) Class 'C'
10. The value of gate voltage for the operation of enhancement of only N channel MOSFET has to be –
Your Answer is :-High positive
ClaunchersAnswer is :-a.) High positive
11. The input gate current of a FET is –
Your Answer is :-a few microamperes
ClaunchersAnswer is :-b.) negligibly small
12. In the following fig. with R = 30k, the value of current through 2 K resistor is –

Your Answer is :-25 mA
ClaunchersAnswer is :-d.) 10 mA
13. A step recovery diode –
Your Answer is :-has on extremely short recovery time
ClaunchersAnswer is :-c.) is mainly used as a harmonic generator
14. In order to get maximum undistorted output signal from CE amplifier with VCC 10V, the value of VCE (Q) should be approximately-
Your Answer is :- 0.1V
ClaunchersAnswer is :-b.) 5V
15. In a FET the electrode, which corresponds to collector in bipolar transistor, is –
Your Answer is :-source
ClaunchersAnswer is :-b.) drain
16. The device which acts like an NPN and a PNP transistor connected base to base and emitter to collector is –
Your Answer is :-Triac
ClaunchersAnswer is :-d.) SCR
17. A typical optical fibre has –
Your Answer is :-High refractive index core and low refractive index cladding
ClaunchersAnswer is :-b.) Low refractive index core and high refractive index cladding
18. In the following figure circuit diagram of an op-amp based is shown. The ratio is equal to –

Your Answer is :-9
ClaunchersAnswer is :-b.) 11
19. When a loud speaker is connected across the terminals A and B of the network shown in the fig. then its impedance to obtain maximum power dissipation in it will be –

Your Answer is :-3 – j
ClaunchersAnswer is :-c.) 7.5 + j 2.5
20. In the lattice network, the value of R for the maximum power transfer to the load –

Your Answer is :-5
ClaunchersAnswer is :-b.) 6.5
21. For a lossy transmission line short circuited at the receiving end, the input impedance is given by (Z0 is the characteristic impedance,  is the propagation constant and l is the length of the line-
Your Answer is :-a
ClaunchersAnswer is :-c.) Z0 tan h. l
22. The approximate thickness of the radome wall should be –
Your Answer is :-a
ClaunchersAnswer is :-b.) /4
23. A relatively permanent information is stored in
Your Answer is :-ROM
ClaunchersAnswer is :-c.) PROM
24. The rise time of the RC network shown in the given figure is approximately equal to –

Your Answer is :-a
ClaunchersAnswer is :- c.) 2RC
25. If in the network shown in the fig. initially a steady state is attained by closing the switch 's' and then if the switch is opened at t = 0, then the current i(t) through the inductor will be –

Your Answer is :-cos50tA
ClaunchersAnswer is :-b.) 2A
26. When the  network of figure – I and T-network of figure – II are equivalent then the values of R1, R2 and R3 will be respectively –

Your Answer is :-9W, 6W and 6W
ClaunchersAnswer is :-b.) 6, 6 and 9
27. When the impedance matrices of a two port networks are given by and , then if these two networks are connected in series then the impedance matrix of the resulting two-port network will be –
Your Answer is :-a
ClaunchersAnswer is :-
28. Joule/coulomb is the unit of -
Your Answer is :-Electric field potential
ClaunchersAnswer is :-b.) Potential
29. The electric field line and equipotential lines-
Your Answer is :-Are parallel to each other
ClaunchersAnswer is :-c.) Cut each other orthogonally
30. For a lossy transmission line short circuited at the receiving end, the input impedance is given by (When Z0 is the characteristic impendence  is the propagation constant and L is the length of the line
Your Answer is :-a
ClaunchersAnswer is :-
31. When two equal positive point charges are placed along X- axis at X1 and –X1 respectively then the electric field vector at a point P on the positive Y-axis will be directed-
Your Answer is :-In the +x direction
ClaunchersAnswer is :-c. ) In the +y direction
32. The directions of and in TEM mode transmission line with respect to the direction of propagation are-
Your Answer is :-a
ClaunchersAnswer is :-a.) Both and are transverse to the direction of propagation
33. The lowest TM mode in a rectangular waveguide of cross –section a x b with a>b will be-
Your Answer is :-TM
ClaunchersAnswer is :-d.)TE11
34. When a transmitter in a free space radiates a mean power of ‘p’ watts uniformly in all directions then at a distance d sufficiently far from the source in plane the electric field E should be related to p and d as –
Your Answer is :-a
ClaunchersAnswer is :-
35. When a dipole antenna was radiating with some excitation in free space radiating a certain amount of the power v if then this antenna is immersed in a lake where water is non-dissipative but has a dielectric constant of 81, then the radiated power with the same excitation will be
Your Answer is :-Decrease to finite non-zero value
ClaunchersAnswer is :-d.) Decrease to zero
36. When a (75 – j40) load is connected to a coaxial line of Z0 = 75  at 6MHz then the load matching on the line can be accomplished by connecting-
Your Answer is :-A short – circuited stub at the load
ClaunchersAnswer is :-b.) An inductance at the load
37. As compared to analog multimeters, digital multimeters are –
Your Answer is :-less accurate
ClaunchersAnswer is :-b.) more accurate
38. When a signal of 10 mV at 75 MHz is to be measured then which of the following instruments can be used –
Your Answer is :-VTVM
ClaunchersAnswer is :-b.) Cathode ray oscilloscope
39. Which of the following statement is true about two wattmeter method for power measurement in three phase current ?
Your Answer is :-power can be measured using two wattmeter method only for star connected three phase circuits.
ClaunchersAnswer is :-d.) when the reading of the two wattmeters are equal but of opposite sign, then the power factor is zero –
40. When a capacitance transducer has two plates of area 5cm2 each, separated by an air gap of 2mm than the displacement sensitivity in pf/cm due to gap change would be –
Your Answer is :-11.
ClaunchersAnswer is :-a.) 11.1
41. The Q of a radio coil –
Your Answer is :-is independent of frequency
ClaunchersAnswer is :-d.) increases upto a certain frequency and then decreases beyond that frequency
42. When a generator of internal impedance and operating at 1GHz feeds a load via a coaxial line of characteristic impedance 50 ohm then the voltage wave ratio on the feed line is –
Your Answer is :-0.
ClaunchersAnswer is :-b.) 1.5
43. The coding system typically used in digital telemetry is –
Your Answer is :-PPM (pulse position modulation)
ClaunchersAnswer is :-c.) PCM (pulse code modulation)
44. Radiation pyrometers are used for the measurement of temperature in the range of –
Your Answer is :--2000C to 5000C
ClaunchersAnswer is :-d.) 12000C to 25000C
45. In the given figure band structure is shown. It is of –

Your Answer is :-Gallium Avesenide (GaAs)
ClaunchersAnswer is :-a.) Gallium Avesenide (GaAs)
46. When anode is positive with respect to cathode in an SCR, the numbers of blocked p-n junction is –
Your Answer is :-1
ClaunchersAnswer is :-a.) 1
47. The circuit symbol for a GTO is
Your Answer is :-a
ClaunchersAnswer is :- b.
48. In the given fig. mark out the type of Cyclo converters

Your Answer is :-1 phase to 1 phase with continuous conduction
ClaunchersAnswer is :-a.) 1 phase to 1 phase with continuous conduction
49. In the given fig. A-1, C=5, m H and C=20 m F, C is initially charged to 200 V. After the switch.
S is closed at t = 0 the
maximum value of current and the
time at which it reaches this value are respectively.

Your Answer is :-400 A, 15.707 mS
ClaunchersAnswer is :-a.) 400 A, 15.707 mS
50. In the given circuit the maximum current in the main SCR M can be-

Your Answer is :-200 A
ClaunchersAnswer is :-b.) 170.7 A
51. The transfer function of an amplifier is given by

The high 3-db frequency of the amplifier will approximately
Your Answer is :-5850 KHZ
ClaunchersAnswer is :-a.) 5850 KHZ
52. In comparison to full wave rectifier with two diodes the four divide bridge rectifier has the dominant advantage of -
Your Answer is :-Higher current carrying
ClaunchersAnswer is :-d.)Lower peak increase voltage require
53. Power output increase in a class-c amplifier-
Your Answer is :-If the conduction angle decrease
ClaunchersAnswer is :-b).If the conduction angle increase
54. A transistor with hie = 1.5 k and hfe = 75 is used in an emitter follower circuit where R1 and R2 are used for normal biasing . Approximate value of it’s current amplification is-
Your Answer is :-77
ClaunchersAnswer is :-b.)76
55. Amplifier of class B has high theoretical efficiency of 78.5 percent because-
Your Answer is :-It is biased almost to saturation
ClaunchersAnswer is :-b.)Its quiescent current is low
56. The coupling that produces minimum interference with frequency response is-
Your Answer is :-Direct coupling
ClaunchersAnswer is :-a.) Direct coupling
57. In the circuit shown in the given figure Rf provides

Your Answer is :-Current series feedback
ClaunchersAnswer is :-d.)Voltage shunt feedback
58. Mark the correct relation for the junction transistor
Your Answer is :-a
ClaunchersAnswer is :-
59. Data in the serial form can be converted into parallel form by using –
Your Answer is :-PISO shift register
ClaunchersAnswer is :-c.) SIPO shift register
60. PROMs are used to store-
Your Answer is :-bulk information
ClaunchersAnswer is :-d.) relatively permanent information
61. The horizontal axis in a 3 bit unipolar D/A converter represents-
Your Answer is :-Output bit combination
ClaunchersAnswer is :-c.) input bit combination
62. 'Not allowed' condition in NAND gate SR flip flop is –
Your Answer is :-s = 0, R = 2
ClaunchersAnswer is :-a.) s = 0, R = 0
63. Name the fastest logic family-
Your Answer is :-TTL
ClaunchersAnswer is :-d.) ECL
64. Equation corresponding to De Morgan's theorem in Boolean Algebra is –
Your Answer is :-(A+B) (A+B) = AA + AB + BA + BB
ClaunchersAnswer is :-
65. In the given fig find radix of the system –

Your Answer is :-2
ClaunchersAnswer is :-a.) 2
66. Modems are used for data transmission telephone lines to –
Your Answer is :-increase the transmission capacity
ClaunchersAnswer is :-a.) increase the transmission capacity
67. The figure of a control system is shown. The maximum value of gain K for which the system is stable is-

Your Answer is :-a
ClaunchersAnswer is :-d.) 5
68. Identify the example of open-loop system-
Your Answer is :-A windscreen wiper
ClaunchersAnswer is :-a.) A windscreen wiper
69. Consider the following expressions indicating the step or impulse response of an initially relaxed control system-
1. (5 – 4e-2+) u(t)
2. (e-2t +5) (u(t))
3 .(t) + 8e-2t u(t)
4 . (t) + 4e-2t 4(t)
Those which correspond to the step and impulse response of the same system include-
Your Answer is :-1&5
ClaunchersAnswer is :-a.) 1&3
70. A system is described by

To test its stability by Lyapunov’s method the following V functions are considered.

Mark the most suitable V-function in this case-
Your Answer is :-Only V
ClaunchersAnswer is :-c.) Both V1 and V2
71. Identity the polar plot of a typical type zero system with open loop transfer function

Your Answer is :-a
ClaunchersAnswer is :-

72. The scattering matrix of a magic –tee shown in the given figure is-
Your Answer is :-a
ClaunchersAnswer is :-
73. Which is the following relate to rational transfer function of a system-
1. Ratio of Fourier transform of output to input with zero initial conditions.
2. Ratio of Laplace transform of output to input with zero initial conditions.
3. Laplace transform of system impulse response.
4. Laplace transform of system unit step response select the correct answer using the codes given below.
Codes
Your Answer is :-1 and 4
ClaunchersAnswer is :-a.) 1 and 4
74. For the signal g (t) – 10 cos (50 pt) cos2 (150at)
The Nyquist sampling state in t seconds is
Your Answer is :-150 samples per second
ClaunchersAnswer is :-d.) 350 samples per second
75. In the case of a 70 MHz 1F carries for a transponder band width of 36 MHz; energy must lie between – MHz.
Your Answer is :-34 and 143
ClaunchersAnswer is :-b.) 52. And 88
76. Radar used to eliminate clutter in navigational application is –
Your Answer is :-Pulse radar
ClaunchersAnswer is :-c.) MTI radar
77. The 1.55 mm windows is not yet in use with fiber optic systems because –
Your Answer is :-The attenuation is higher than at 0.85 mm
ClaunchersAnswer is :-c.) Suitable laser devices have not yet been developed
78. Pre-emphasis in FM systems involves-
Your Answer is :-Compression of the modulating signal
ClaunchersAnswer is :-d.) Amplification of higher frequency components of the modulating signal.
79. In a terrestrial microwave system transmission of signals is achieved through-
Your Answer is :-reflection from the ionosphere
ClaunchersAnswer is :-b.) line of sight mode
80. Casse grain feed is used with a parabolic reflector to
Your Answer is :-increase the gain of the system
ClaunchersAnswer is :-d.) allow the feed to be placed at a convenient point.
81. In most microwave communication link rain drop attenuation is caused due to-
Your Answer is :-scattering of microwaves by water drops of specific size.
ClaunchersAnswer is :-c.) absorption of microwaves by water and consequent heating of the liquid
82. Circuit in the given figure represents. –

Your Answer is :-an astable multivibrator
ClaunchersAnswer is :-a.) an astable multivibrator
83. . D = r is-
Your Answer is :-Maxwell's 1st equation
ClaunchersAnswer is :-c.) Maxwell's III equation
84. In a rectangular wave-guide which TM mode exists-
Your Answer is :-TM
ClaunchersAnswer is :-d.) TM11
85. In directional coupler a portion of power two velliry fram port 1) to port 2) is coupled to.
Your Answer is :-port 4
ClaunchersAnswer is :-a). port 4

86. For high power i.e. 10 w to 50 kw measurement –
Your Answer is :-Barometer are used
ClaunchersAnswer is :-d.) Calorimetric watt meter technique used
87. The difference between TWT & klystron is –
Your Answer is :-In TWT electrons are in contact with RF field for long time & in klystron for short time
ClaunchersAnswer is :-a.) In TWT electrons are in contact with RF field for long time & in klystron for short time
88. Which one is most suitable for transmission through wave guide-
Your Answer is :-Hown antennas
ClaunchersAnswer is :-c.) helical antenna
89. The skip distance of microwave is given by –
Your Answer is :-a
ClaunchersAnswer is :-b. )
90. How many general purpose registers 8085p-
Your Answer is :-4
ClaunchersAnswer is :-b.) 6
91. 8085 P has no. of addressing modes-
Your Answer is :-2
ClaunchersAnswer is :-c.) 4
92. What will be status of z and c y flag after execution of SUB A instruction
Your Answer is :- z = 0, cy = 0
ClaunchersAnswer is :-c.) z = 1, cy = 0
93. Microprocessor accept interrupt only if.
Your Answer is :-interrupt flip flop disabled.
ClaunchersAnswer is :-c. ) interrupt flip flop enabled.
94. Microprogramming is a technique
Your Answer is :-for programming the microprocessor
ClaunchersAnswer is :-c.) for programming the control steps of computer
95. High level programs like C are converted into machine language with the help of
Your Answer is :- interpreter
ClaunchersAnswer is :-b.) compiler
96. (10110011)2 = (?)8
Your Answer is :-274
ClaunchersAnswer is :-b.) 263
97. A Not gate at the output of AND gate converts AND gate into-
Your Answer is :-NAND
ClaunchersAnswer is :-a.) NAND
98. The O/P of a logic gate is the gate must be-
Your Answer is :-AND
ClaunchersAnswer is :-d.) X-OR
99. A symbol of JK flip flop is-
Your Answer is :-a
ClaunchersAnswer is :-
100. A demultiplener-
Your Answer is :-has multiple i/p and single o/p
ClaunchersAnswer is :-b.) has multiple i/p and multiple o/p
101. Which of the following best describes the authour`s attitude toward fairy tales ?
Your Answer is :-fascination
ClaunchersAnswer is :-b.) open approval.
102. What type of sentence is this ?
Hurray! We won the match
Your Answer is :-Exclamatory
ClaunchersAnswer is :-a.) Exclamatory
103. Before which of the following word will you put 'a'
Your Answer is :-hour
ClaunchersAnswer is :-d.) Man
104. The noun form of 'fresh' is –
Your Answer is :-freshly
ClaunchersAnswer is :-c.) fresheners
105. The word 'clang' is an example of –
Your Answer is :- Simile
ClaunchersAnswer is :-c.) onomatopoeia
106. The Forbes magazine acclaimed Azim Premji as richest India's is the chairman of-
Your Answer is :-Pentafour software
ClaunchersAnswer is :-d.) Wipro
107. Bharat Ratna award for the year 2001 goes to-
Your Answer is :-Lata Mangeshkar and Zakeer Hussain
ClaunchersAnswer is :-c.) Bismillah Khan and Lata Mangeshkar
108. Mr. George W-Bush takes over as ------ President of the united states of America succeeding Mr. Bill Clinton-
Your Answer is :-42nd
ClaunchersAnswer is :-b.) 43rd
109. New Chief Minister of Pondicherry is-
Your Answer is :-T. Venkat Naidu
ClaunchersAnswer is :-c.) N. Rengaswany
110. No court has the jurisdiction to interfere with the election process once set in motion by the Election commission. This is enshrined in Article-
Your Answer is :-366
ClaunchersAnswer is :-b.) 329
111. Ostrich is a-
Your Answer is :-Running bird
ClaunchersAnswer is :-a.) Running bird
112. The main atmospheric gas responsible for green house is-
Your Answer is :-Oxygen
ClaunchersAnswer is :-d.) Carbon-dioxide
113. Which of the following is not a Kharif Crop-
Your Answer is :-Rice
ClaunchersAnswer is :-d.) gram
114. The function of World Bank is to-
Your Answer is :-Help in reconstruction and development of world economy
ClaunchersAnswer is :-a.) Help in reconstruction and development of world economy
115. Speed of sound is maximum in-
Your Answer is :-Water
ClaunchersAnswer is :-c.) Steel
116. “Long years ago we made a trust with destiny.” Whose words are these-
Your Answer is :-Subhash Chandra Bose
ClaunchersAnswer is :-b.) Jawaharlal Nehru
117. Durand cup is associated with-
Your Answer is :-Hockey
ClaunchersAnswer is :-c.) Football
118. Rabindranath Tagore was awarded the Nobel Prize in literature in the year.
Your Answer is :-1915
ClaunchersAnswer is :-c.) 1913
119. India successfully conducted its first underground nuclear experiment at Pokhran in Rajas than on-
Your Answer is :-May 18,
ClaunchersAnswer is :-a.) May 18, 1975
120. An emergency loan of $ 500 million to help reconstruct infrastructure in earth quake devastated Gujarat approved by-
Your Answer is :-Asian development Bank
ClaunchersAnswer is :-a.) Asian development Bank

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