BSNL GE-JTO Recruitment Examination
Question and Answers
1. Reactive current through the capacitive load produces -
Answer is :- b) Electric field
2. One of the following which gives piero-electric effect is -
Answer is :- b) PVDF
3. PZT piezo- electric materials have -
Answer is :-b) Lower curie temperature
4. The residual resistivity of a binary alloy at OK is -
Answer is :-d) Dependent on the concentration of the minor component in the alloy
5. In active filter circuits, inductances are avoided mainly because they -
Answer is :-b)Are bulky and unsuitable for miniaturisation
6. The depletion layer across a p-n junction lies -
Answer is :-b) mostly in the n-region
7. The voltage induced in a loop of wire rotating in a strong and steady magnetic field is -
Answer is :-d) ac
8. One of the following types of capacitor which is polarized is -
Answer is :-a) Electrolytic
9. Electric shock is-
Answer is :-c) Sometimes fatal
10. A typical value of filter capacitor for 50 Hz ripple is -
Answer is :-a) 16mF
11. A telephone relay armature is made of material with -
Answer is :-c) Negligible conductivity
12. Larger the value of filter capacitor -
Answer is :-d) Smaller is the dc voltage across the load
13. Barrier potential in a P-N junction is caused by -
Answer is :-b) Diffusion of majority carriers across the junction
14. The polarity of VGS for E-only MOSFET is -
Answer is :-d) depends on P or N channel
15. The following which will serve as a donor impurity in silicon -
Answer is :-d) Antimony
16. When bias applied to a vari-cap diode is increased, its capacitance -
Answer is :-a) is decreased
17. In case of a bipolar transistor a is -
Answer is :-d) negative and less than 1
18. A BJT is -
Answer is :-b) very sensitive to radiations.
19. An SCR may be considered to be -
Answer is :-b) 3 diodes
20. For a BJT, under the saturation condition -
Answer is :-d) IC < bIB
21. In modern MOSFET’s the material used for the gate is -
Answer is :-c) Heavily doped polycrystalline silicon28. An attenuator drops a 10V signal to 50mv in an experiment. The loss in decibels is -
Answer is :-b) –6dB
29. When the network has 10 nodes and 17 branches then the number of different node pair voltages would be -
Answer is :-b) 9
30. The circuit shown in the following fig. will act as an ideal current source with respect to terminals A and B when frequency is -
Answer is :-c) 4rad/s
31. When a short vertical grounded antenna is required to radiate at 1MHz and the effective height of the antenna is 30 m then the calculated value of the radiation resistance is -
Answer is :-c) 15.8 W
32. Shannon’s law relates -
Answer is :-d) information carrying capacity to S/N ratio
33. One of the following modes which has the characteristic of attenceation becoming less as the frequency is increased and is attractive at microwave frequencies of circular cylindrical wave guides is -
Answer is :-c) TE01 mode
34. For a transmission line, the propogation constant, for a TEM wave travelling in it is given by (Where the symbols have the usual meanings ) -
Answer is :-b) [ R+jwL) (G+jwc)] ½
35. The advantages of wave guides over co-axial lines would include which of the following features-
1. Easier to use 2. lower power losses
3. Higher operating frequencies possible
Answer is :-c) 2 and 3
36. When a 75 ohm transmission line is to be terminated in two resistive loads R1 and R2 such that the standing pattern in the two cases have the same SWR , then the values of R1 and R2 (in ohms) should be -
Answer is :-b) 225 and 25 respectively
37. The degenerate modes in a wave guide are characterized by -
Answer is :-a) Same cut off frequencies but different field distribution
38. A TEM wave impinges obliquely on a dielectric-dielectric boundary with Er1=2 and Er2=1, the angle of incidence for total reflection is -
Answer is :-a) 30 0
39. The radiation pattern of Hertzian dipole in the plane perpendicular to the dipole is a -
Answer is :-c) Figure of eight
40. Permeance is the -
Answer is :-c) reciprocal of the reluctance
41. One of the following which is an active transducer is -
Answer is :-d) Photo emission
42. The wein bridge uses only -
Answer is :-d) Capacitors and Resistors.
43. The greater the value of Q -
Answer is :-b) smaller will be the bandwidth of the resonant circuit.
44. The most serious source of error in a) c) bridge measurement is -
Answer is :-d) stray fields.
45. Moving iron instruments -
Answer is :-b) do not have a linear scale
46. If accuracy is the main consideration, which one of the following voltmeters should one select -
Answer is :-d) 10,000 v ; 10 mA
47. In dc tacho generators used for measurement of speed of a shaft, frequent calibration has to be done because -
Answer is :-c) the armature current produces heating effect
48. Ideal transformer cannot be described by -
Answer is :-c) G parameters
49. Consider the following statements -
A3- phase balanced supply system is connected to a 3 phase unbalanced load) Power supplied to this load can be measured using
1. Two wattmeters
2. One wattmeter
3. Three wattmeters
Which of these statements is/are correct?
Answer is :-b) 1 and 3
50. The function of the reference electrode in a pH meter is to -
Answer is :-a) Produce a constant voltage
51. Match the column A (Devices) with column B (Characteristics) and select the correct answer by using the codes given below the column -
Column A Column B
A) BJT 1. Voltage controlled negative resistance
B) MOSFET 2. High current gain
C) Tunnel diode 3. Voltage regulation
D) Zener diode 4. High input impedance
Codes :
A B C D
Answer is :-b) 2 4 1 3
52. A thyristor during forward blocking state is associated with.-
Answer is :-b) low current , large voltage.
53. In controlled rectifiers, the nature of load current i.e. whether load current is continuous or discontinuous -
Answer is :-b) depends both on the type of load and firing angle delay
54. A single phase voltage controller feeds power to a resistance of 10 W . The source voltage is 200 V rms. For a firing angle of 900 , the rms value of thyristor current in amperes is -
Answer is :-c) 10
55. In the performance of single phase and three phase full converters the effect of source inductance is to
Answer is :-c) reduce the output voltage
56. The cycloconverters (CCs) require natural or forced commutation as under -
Answer is :-c) forced commutation in step up CCs
57. Power transistors are more commonly of -
Answer is :-a) silicon npn type.
58. C is a -
Answer is :-b) High level language
59. What will be output of program
main ( )
{ int i ;
print f (”Enter value of i”);
scant (”%d”, & i);
if ( i = 5 )
print f (”you entered 5″);
else
print f (”you entered %d”, i ); }
if user entered 100 then
Answer is :-a) 5
60. (7F)16 + (BA)16 = (?)16-
Answer is :-b) 139
61. Two’s complement of 3 bit nonzero linory number is some or original number is all bits accepts-
Answer is :-a) MSB are zeros
63. . Transistors with high frequency have -
Answer is :-a) Thick base
64. Telephone traffic is specified in terms of -
Answer is :-d) Erlangs
65. In a Hartley oscillator -
Answer is :-a) Necessary phase relation is obtained by connecting grid and plate electrodes to the opposite ends of the tuned circuit.
66. The condenser C is charged in a bootstrap sweep generator -
Answer is :-a) Linearly but the discharge is non linear
67. In an audio amplifier audio signals become garbled and hence difficult to understand when an ac input current is large enough to drive the output to -
Answer is :-c) Either saturation or cut off
68. Five 1 bit registers are referred as -
Answer is :-a) Flags
69. Next binary number after 0,1, 10, 11 is -
Answer is :-c) 100
72. . If an inverter is placed at the input to an SR flip flop, the result is -
Answer is :-b) D flip flop
74. For the transfer function G(S)H(S) = the phase cross over frequency is -
Answer is :-b) 0.707 rad/sec
78. Angle subtended by earth at geostationary communication satellite is -
Answer is :-a) 17.340
79. For data transmission phase modulation is commonly used because -
Answer is :-b) It is resistant to the effects of noise.
80. Several channels are interleaved and then transmitted together is known as –
Answer is :-a) Frequency division multiplex
81. Identify the wrong statement-
The radar cross section of a target -
Answer is :-d) Is equal to the actual cross-sectional area for small targets.
82. Considering following parameters -
1. Loss in the media) 2. Permeability of the media) 3. Frequency of the wave 4. Velocity of the wave. Which of these parameters are responsible for the change of phase of a propagating electromagnetic wave?
Answer is :-b) 2, 3 and 4
83. In super heterodyne receivers double spotting is caused by -
Answer is :-a) poor front-end rejection
84. The number of lines per field in the United States TV system is -
Answer is :-a) 262 1/2
85. In a TV receiver the color killer -
Answer is :-a) cuts off the chroma stages during monochrome receivers.
86. The nominal capacitance of a coaxial RF cable is of 40 pF/m and the characteristic impedance of 50W. The inductance of the cable is-
Answer is :-c) 0.1 mH/m
87. Transmission of wave through Dominant mode is -
Answer is :-a) distortion less transmission
88. Lower the standing wave ratio (SWR) -
Your Answer is –
Answer is :-b) Lower mismatch error
89. In klyrtron oscillator for getting wide range of oscillations resonators should be -
Answer is :-c) Over coupled
90. The critical frequency is always -
Answer is :-a) Lower than maximum usable frequency
91. The PIN diode based on -
Answer is :-c) Negative resistance
92. Which antenna having circular polarization -
Answer is :-c) Helical antenna
93. The i/p S/N ratio of system is 50 and the o/p S/N ratio is 5 the noise figure is -
Answer is :-c) 10
94. In the 8085 mP, the RST 6 instruction transfers the program execution to the following location -
Answer is :-a) 30 H
95. In instruction cycle first operation is -
Answer is :-c) Opcode fetch
96. CMP instruction comes under group -
Your Answer is –
Answer is :-d) Logical operations.
97. In which logic operation does not effect any flags -
Answer is :-d) CMA
98. What happen when CALL instruction executed -
Answer is :-c) 16 bit address of instruction saved on stock
99. The mark status of mark able interrupts is defined according to content of -
Answer is :-d) Accumulator
100. The decoder is a logic ckt that -
Answer is :-b) Identifies each combination of the signals present at i/p
101. The young man was quickly promoted when his employers how ————— he was -
Answer is :-c) assiduous
102. As letter is alphabet so zodiac is -
Answer is :-c) sign
103. What is the correct meaning of prudish.?
Answer is :-a) careful
104. Pick out the odd matching with reference to number -
Answer is :-b) hair – hairs
105. Choose the phrase that is most nearly similiar in meaning to the word given below-
Abut is
Answer is :-d) Adjoin
106. The highest mountain peak in Indian Territory is -
Answer is :-b) Kanchenjunga
107. German silver is an alloy comprising -
Answer is :-a) Copper, Nickel and Zinc
108. Mughal Emperor Bahadur Shah Zafar’s mausoleum is in -
Answer is :-c) Yangon
109. On which date the World Trade Centre in New York and Pentagon in Washington d)C was attacked by terrorist -
Answer is :-b) 11 September 2001
110. India defeats South Africa in the finals of the inaugural champions challenge Hockey Tournament in Kualalumpur by -
Answer is :-d) 2-1
111. Which planets in the solar system are known as ‘Inferior Planets’ -
Answer is :-d) Mercury and Venus.
112. The largest Stupa in Southern India is at -
Answer is :-b) Amravati
113. The new chairman and Managing Director of Industrial Finance Corporaton of India (IFCI) is -
Answer is :-a) Mr. Vishwanath Prasad Singh
114. Which one is the latest among rock-cut temples?
Answer is :-c) Elephanta
115. Number of organisations government ban in Jammu and Kashmir and the North East under the new ordinance ‘POTO’ is -
Answer is :-d) 23
116. In bed of which river does Badrinath shrine stand?
Answer is :-c) Alakananda
117. The nerve endings for the sense of sight are located in the part of the eye called the -
Answer is :-d) Retina
118. Fundamental duties were introduced in the constitution by the -
Answer is :-b) 42nd Amendment
119. The Khalsa Panth was founded by -
Answer is :-d) Guru Govind singh
120. Number of countries involved in international fleet review hosted by India is -
Answer is :-c) 29
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