BSNL GE-JTO Recruitment Examination
Test Paper - V
1. Reactive current through the capacitive load produces -
a) Magnetic field
b) Electric field
c) Supermagnetic field
d) None
2. One of the following which gives piero-electric effect is -
a) Mu metal
b) PVDF
c) Sapphire
d) Ferrites
3. PZT piezo- electric materials have -
a) Higher curie temperature
b) Lower curie temperature
c) Absolute temperature
d) None
4. The residual resistivity of a binary alloy at OK is -
a) The sum of the residual resistivities of the component metals
b) The difference of the residual resistivities of the component metals.
c) The product of the residual resistivities of the component metals
d) Dependent on the concentration of the minor component in the alloy
5.
In active filter circuits, inductances are avoided mainly because they -
a) Are always associated with some resistance
b) Are bulky and unsuitable for miniaturisation
c) Are non-linear in nature
d) Saturate quickly
6.
The depletion layer across a p-n junction lies -
a) mostly in the p-region
b) mostly in the n-region
c) equally to both p and n region
d) entirely in the p-region
7.
The voltage induced in a loop of wire rotating in a strong and steady magnetic field is -
a) pulsating dc
b) dc
c) rectified ac
d) ac
8.
One of the following types of capacitor which is polarized is -
a) Electrolytic
b) Ceramic
c) Paper
d) Mylar
9.
Electric shock is-
a) Always fatal
b) Never fatal
c) Sometimes fatal
d) Always disfiguring
10.
A typical value of filter capacitor for 50 Hz ripple is -
a) 16mF
b) 10F
c) 10mF
d) None
11.
A telephone relay armature is made of material with -
a) High electrical conductivity
b) Low electrical conductivity
c) Negligible conductivity
d) None
12.
Larger the value of filter capacitor -
a) Larger is the peak-peak value of ripple voltage
b) Larger is the peak current in the rectifying diode
c) Longer is the time that current pulse flows through the diode
d) Smaller is the dc voltage across the load
13.
Barrier potential in a P-N junction is caused by -
a) Thermally generated electrons and holes
b) Diffusion of majority carriers across the junction
c) Migration of minority carriers across the junction
d) Flow of drift current
14.
The polarity of VGS for E-only MOSFET is -
a) positive
b) negative
c) zero
d) depends on P or N channel
15.
The following which will serve as a donor impurity in silicon -
a) Boron
b) Indium
c) Germanium
d) Antimony
16.
When bias applied to a vari-cap diode is increased, its capacitance -
a) is decreased
b) is increased
c) remains constant
d) first increases and then decreases.
17.
In case of a bipolar transistor a is -
a) positive and greater than 1
b) positive and less than 1
c) negative and greater than 1
d) negative and less than 1
18.
A BJT is -
a) not very sensitive to radiations
b) very sensitive to radiations.
c) independent of radiations
d) none
19. An SCR may be considered to be -
a) 2 diodes
b) 3 diodes
c) 4 diodes
d) 5 diodes
20. For a BJT, under the saturation condition -
a) IC = bIB
b) IC > bIB
c) IC is independent of all other parameters
d) IC < bIB
21.
In modern MOSFET’s the material used for the gate is -
a) High purity silicon
b) High purity silica
c) Heavily doped polycrystalline silicon
d) Epitaxial grown silicon
22. Find the Norton's equivalent of the circuit given below -
23. When the source in the circuit shown is a sinusoidal source then the input voltage is -
a) 10V
b) 5V
c) 27V
d) 24V
24. The time constant of the network shown in the given figure is given by -
25. The voltage transfer ratio of two-port networks connected in cascade may be conveniently obtained from the -
a) product of the individual ABCD matrices of the two networks
b) product of voltage transfer ratios of the two individual networks
c) sum of the Z- matrices of the two networks
d) sum of the h – matrices of the two networks
26. When a network has response with time as shown in fig. then which one of the following diagrams represents the location of the poles of this network ?
27. For the network shown in the given fig. the ratio is -
28. An attenuator drops a 10V signal to 50mv in an experiment. The loss in decibels is -
a) –40dB
b) –6dB
c) –55dB
d) –60dB
29. When the network has 10 nodes and 17 branches then the number of different node pair voltages would be -
a) 7
b) 9
c) 10
d) 45
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 -
a) zero
b) 1rad/s
c) 4rad/s
d) 16rad/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 -
a) 1.58 W
b) 158 W
c) 15.8 W
d) None of these
32. Shannon’s law relates -
a) antenna gain to bandwidth
b) frequency to antenna gain
c) antenna gain to transmission losses
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 -
a) TE1 mode
b) TM01 mode
c) TE01 mode
d) Higher order 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 ) -
a) [ (R+jwL) (G+jwc)]
b) [ R+jwL) (G+jwc)] ½
c) [ (R-jwL) (G + jwc) ] ½
d) [(R-jwL) ( G+jw2c)]1/3
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
a) 1 and 2
b) 1 and 3
c) 2 and 3
d) 1,2 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 -
a) 250 and 200 respectively
b) 225 and 25 respectively
c) 100 and 150 respectively
d) 50 and 125 respectively
37. The degenerate modes in a wave guide are characterized by -
a) Same cut off frequencies but different field distribution
b) Same cut off frequencies and same field distributions
c) Different cut off frequencies but same field distributions
d) Different cut off frequencies and different field distributions
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 -
a) 30 0
b) 60 0
c) 45 0
d) 90 0
39. The radiation pattern of Hertzian dipole in the plane perpendicular to the dipole is a -
a) Null
b) Circle
c) Figure of eight
d) None of the above
40. 40. Permeance is the -
a) square of reluctance
b) reluctance
c) reciprocal of the reluctance
d) cube of the reluctance.
41. One of the following which is an active transducer is -
a) Photoelectric
b) Photovoltaic
c) Photo-conductive
d) Photo emission
42. The wein bridge uses only -
a) Inductors
b) Capacitors
c) Resistors
d) Capacitors and Resistors.
43. The greater the value of Q -
a) higher will be the bandwidth of the resonant circuit.
b) smaller will be the bandwidth of the resonant circuit.
c) nothing can be said)
d) none.
44. The most serious source of error in a) c) bridge measurement is -
a) eddy currents
b) leakage currents
c) residual imperfectness
d) stray fields.
45. Moving iron instruments -
a) have a linear scale
b) do not have a linear scale
c) both a and b)
d) none.
46. If accuracy is the main consideration, which one of the following voltmeters should one select -
a) 100 v ; 2 mA
b) 100 v ; 100 ohm/volt
c) 100 v ; 1mA
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 -
a) the contacts wear off
b) the strength of permanent magnet decreases with age
c) the armature current produces heating effect
d) there is back emf.
48. Ideal transformer cannot be described by -
a) h parameters
b) ABCD parameters
c) G parameters
d) 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?
a) 1 and 2
b) 1 and 3
c) 2 and 3
d) 3 alone
50.
The function of the reference electrode in a pH meter is to -
a) Produce a constant voltage
b) Provide temperature compensation
c) Provide a constant current
d) Measure average pH value
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
a) 1 4 2 3
b) 2 4 1 3
c) 2 3 1 4
d) 1 3 2 4
52.
A thyristor during forward blocking state is associated with.-
a) large current , low voltage.
b) low current , large voltage.
c) medium current , large voltage
d) low current, medium voltage.
53.
In controlled rectifiers, the nature of load current i.e. whether load current is continuous or discontinuous -
a) does not depend on type of load and firing angle delay
b) depends both on the type of load and firing angle delay
c) depends only on the type of load)
d) depends only on the 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 -
a) 20
b) 15
c) 10
d) 5
55. In the performance of single phase and three phase full converters the effect of source inductance is to
a) reduce the ripples in the load current -
b) make discontinuous current as continuous
c) reduce the output voltage
d) increase the load voltage.
56. The cycloconverters (CCs) require natural or forced commutation as under -
a) natural commutation in both step up and step down CCs
b) forced commutation in both step up and step down CCs
c) forced commutation in step up CCs
d) forced commutation in step down CCs
57. Power transistors are more commonly of -
a) silicon npn type.
b) silicon pnp type.
c) silicon nnp type.
d) silicon npp type.
58.
C is a -
a) Middle level language
b) High level language
c) Low level language
d) None of above
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
a) 5
b) 100
c) 1005
d) None
60. (7F)16 + (BA)16 = (?)16-
a) 481
b) 139
c) –481
d) –139
61. Two’s complement of 3 bit nonzero linory number is some or original number is all bits accepts-
a) MSB are zeros
b) LSB are zeros
c) MSB are ones
d) LSB are ones.
62. The schematic circuits of RTL NOR gate is-
63. Transistors with high frequency have -
a) Thick base
b) Thin base
c) Some other feature
d) None of the above
64. Telephone traffic is specified in terms of -
a) Average waiting time
b) Grade of service
c) Peak waiting time
d) Erlangs
65. In a Hartley oscillator -
a) Necessary phase relation is obtained by connecting grid and plate electrodes to the opposite ends of the tuned circuit.
b) The mutual inductance must have the appropriate polarity.
c) Both grid circuit and plate tuned circuit offer inductive reactance
d) None of the above
66. The condenser C is charged in a bootstrap sweep generator -
a) Linearly but the discharge is non linear
b) Non linearly but the discharge is linear
c) Linearly and the discharge is linear
d) Non linearly and 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 -
a) saturation only
b) Cut off only
c) Either saturation or cut off
d) A value off the load line
68. Five 1 bit registers are referred as -
a) Flags
b) Slags
c) Tags
d) None of the above
69. Next binary number after 0,1, 10, 11 is -
a) 12
b) 101
c) 100
d) 110
70. Identify coincidence logic circuit in the following –
a) b)
c) d)
71. The output analog voltage Vo is given by -
72. If an inverter is placed at the input to an SR flip flop, the result is -
a) T flip flop
b) D flip flop
c) JK flip flop
d) BCD decade counter
73. See the Root locus diagram of a system and the following statements :-
1. The open loop system is a second order system.
2. The system is over damped for
3. The system is absolutely stable for all value of R.
Which of these statements are correct?
a) 1, 2, & 3
b) 1 and 3
c) 2 and 3
d) 1 and 2
74. For the transfer function G(S)H(S) = the phase cross over frequency is -
a) 0.5 rad/sec
b) 0.707 rad/sec
c) 1.732 rad/sec
d) 2 rad/sec
75. If the open loop transfer function of the system is G(S) H(S) =
then a closed loop pole will be located at S = -12 wher the value of K is -
a) 4355
b) 5760
c) 9600
d) 9862
76. Considering the following open loop transfer function -
The correct sequence of these systems in increasing order of the time taken for the unit step response to settle is –
a) 1, 2, 3
b) 3, 1, 2
c) 2, 3, 1
d) 3, 2, 1.
77. Considering unit feed back control system in the given figure, the ratio of time constant of closed loop response to open loop response will be -
a) 1: 1
b) 2 :1
c) 3 : 2
d) 2 : 3
78.
Angle subtended by earth at geostationary communication satellite is -
a) 17.340
b) 51.40
c) 1200
d) 600
79. For data transmission phase modulation is commonly used because -
a) Phase can be varied from +1800 to -1800
b) It is resistant to the effects of noise.
c) Demodulation is very easy
d) It gives highest data rates that can be transmitted over a given channel.
80. Several channels are interleaved and then transmitted together is known as –
a) Frequency division multiplex
b) Time division multiplex
c) A group
d) A super group
81. Identify the wrong statement-
The radar cross section of a target -
a) Depends on the frequency used
b) May be reduced by special coating of the target
c) Depends on the aspect of a target, if this is non spherical
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?
a) 1, 2, and 3
b) 2, 3 and 4
c) 1, 3 and 4
d) 1 and 4
83. In super heterodyne receivers double spotting is caused by -
a) poor front-end rejection
b) misalignment of receiver
c) detuning of one or more IF stages.
d) non functioning of AGC
84. The number of lines per field in the United States TV system is -
a) 262 1/2
b) 525
c) 30
d) 60
85. In a TV receiver the color killer -
a) cuts off the chroma stages during monochrome receivers.
b) ensures that no color is transmitted to monochrome receivers
c) prevents color overloading
d) makes sure that the color burst is not mistaken for sync pulses, by cutting off reception during the back porch.
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-
a) 1mH/m
b) 10 mH/m
c) 0.1 mH/m
d) 0.01 mH/m
87. Transmission of wave through Dominant mode is -
a) distortion less transmission
b) generates undesirable harmonic distortion
c) having loss of power
d) None of above.
88.
Lower the standing wave ratio (SWR) -
a) Greater mismatch error
b) Lower mismatch error
c) No effect on matching
d) Moderate mismatch error
89.
In klyrtron oscillator for getting wide range of oscillations resonators should be -
a) Critically coupled
b) Under coupled
c) Over coupled
d) No coupling required
90.
The critical frequency is always -
a) Lower than maximum usable frequency
b) Equal to maximum usable frequency
c) Higher than maximum usable frequency
d) None of above
91.
The PIN diode based on -
a) Nonlinear resistance
b) Nonlinear reactance
c) Negative resistance
d) Controllable impedence
92.
Which antenna having circular polarization -
a) Horn antenna
b) Lens antenna
c) Helical antenna
d) Discone 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 -
a) 250
b) 55
c) 10
d) 45
94.
In the 8085 mP, the RST 6 instruction transfers the program execution to the following location -
a) 30 H
b) 24 H
c) 48 H
d) 60 H
95.
In instruction cycle first operation is -
a) Memory read
b) Address read
c) Opcode fetch
d) Data read
96.
CMP instruction comes under group -
a) Data transfer
b) Branching operations
c) Machine control operation
d) Logical operations.
97.
In which logic operation does not effect any flags -
a) ANA B
b) ORA B
c) XRI A2H
d) CMA
98.
What happen when CALL 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)
99.
The mark status of mark able interrupts is defined according to content of -
a) stack pointer.
b) HL register .
c) Program counter
d) Accumulator
100.
The decoder is a logic ckt that -
a) Amplifies the current or power at i/p.
b) Identifies each combination of the signals present at i/p
c) Provides appropriate code as o/p for each i/p signal
d) Both b & c)
101. The young man was quickly promoted when his employers how --------------- he was -
a) indigent
b) indifferent
c) assiduous
d) cursory.
102. As letter is alphabet so zodiac is -
a) almanac
b) beacon
c) sign
d) signal.
103. What is the correct meaning of prudish.?
a) careful
b) fast
c) God
d) brave
104. Pick out the odd matching with reference to number -
a) woman – women.
b) hair – hairs
c) child – children.
d) foot – feet.
105. Choose the phrase that is most nearly similiar in meaning to the word given below-
Abut is
a) Stimulate
b) Grasp
c) Oppose
d) Adjoin
106. The highest mountain peak in Indian Territory is -
a) Mount Everest
b) Kanchenjunga
c) Nanda Devi
d) Mount Kailash
107. German silver is an alloy comprising -
a) Copper, Nickel and Zinc
b) Silver, copper and Zinc
c) Silver Nickel and Zinc
d) Nickel, Zinc and Lead
108. Mughal Emperor Bahadur Shah Zafar’s mausoleum is in -
a) Delhi
b) Lahore
c) Yangon
d) Agra
109. On which date the World Trade Centre in New York and Pentagon in Washington d)C was attacked by terrorist -
a) 12 September 2001
b) 11 September 2001
c) 11 July 2001
d) 20 December 2001
110. India defeats South Africa in the finals of the inaugural champions challenge Hockey Tournament in Kualalumpur by -
a) 4-2
b) 2-0
c) 3-2
d) 2-1
111. Which planets in the solar system are known as ‘Inferior Planets’ -
a) Earth and Mars
b) Earth and Mercury
c) Mars and Mercury
d) Mercury and Venus.
112. The largest Stupa in Southern India is at -
a) Nellore
b) Amravati
c) Tanjore
d) Kozhikode
113. The new chairman and Managing Director of Industrial Finance Corporaton of India (IFCI) is -
a) Mr. Vishwanath Prasad Singh
b) Mr. Jitendra Patil
c) Mr. Ragh
d) Mr. Shubhash chand Jain
114. Which one is the latest among rock-cut temples?
a) Ajanta
b) Ellora
c) Elephanta
d) All originated in the same period)
115. Number of organisations government ban in Jammu and Kashmir and the North East under the new ordinance ‘POTO’ is -
a) 20
b) 21
c) 22
d) 23
116. In bed of which river does Badrinath shrine stand?
a) Ganga
b) Mandakini
c) Alakananda
d) Bhagirathi
117. The nerve endings for the sense of sight are located in the part of the eye called the -
a) Cornea
b) Sclera
c) Iris
d) Retina
118. Fundamental duties were introduced in the constitution by the -
a) 40th Amendment
b) 42nd Amendment
c) 43rd Amendment
d) 44th Amendment
119. The Khalsa Panth was founded by -
a) Guru Hargovind
b) Guru Nanak Dev
c) Guru Tegh Bahadur
d) Guru Govind singh
120. Number of countries involved in international fleet review hosted by India is -
a) 27
b) 28
c) 29
d) 30
-=========================================================================================
ANSWERS
1. Reactive current through the capacitive load produces -
Your Answer is :-
Answer is :- b) Electric field
2. One of the following which gives piero-electric effect is -
Your Answer is :--
Answer is :- b) PVDF
3. PZT piezo- electric materials have -
Your Answer is :--
Answer is :-b) Lower curie temperature
4. The residual resistivity of a binary alloy at OK is -
Your Answer 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 -
Your Answer is :--
Answer is :-b)Are bulky and unsuitable for miniaturisation
6. The depletion layer across a p-n junction lies -
Your Answer is :--
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 -
Your Answer is :-
Answer is :-d) ac
8. One of the following types of capacitor which is polarized is -
Your Answer is :-
Answer is :-a) Electrolytic
9. Electric shock is-
Your Answer is :-
Answer is :-c) Sometimes fatal
10. A typical value of filter capacitor for 50 Hz ripple is -
Your Answer is :-
Answer is :-a) 16mF
11. A telephone relay armature is made of material with -
Your Answer is :-
Answer is :-c) Negligible conductivity
12. Larger the value of filter capacitor -
Your Answer is :-
Answer is :-d) Smaller is the dc voltage across the load
13. Barrier potential in a P-N junction is caused by -
Your Answer is :-
Answer is :-b) Diffusion of majority carriers across the junction
14. The polarity of VGS for E-only MOSFET is -
Your Answer is :-
Answer is :-d) depends on P or N channel
15. The following which will serve as a donor impurity in silicon -
Your Answer is :-
Answer is :-d) Antimony
16. When bias applied to a vari-cap diode is increased, its capacitance -
Your Answer is :-
Answer is :-a) is decreased
17. In case of a bipolar transistor a is -
Your Answer is :--
Answer is :-d) negative and less than 1
18. A BJT is -
Your Answer is :-
Answer is :-b) very sensitive to radiations.
19. An SCR may be considered to be -
Your Answer is :-
Answer is :-b) 3 diodes
20. For a BJT, under the saturation condition -
Your Answer is :-
Answer is :-d) IC < bIB
21. In modern MOSFET’s the material used for the gate is -
Your Answer is :-
Answer is :-c) Heavily doped polycrystalline silicon
22. Find the Norton's equivalent of the circuit given below -
Your Answer is :-
Answer is :-
23. When the source in the circuit shown is a sinusoidal source then the input voltage is -
Your Answer is :-
Answer is :-b) 5V
24. The time constant of the network shown in the given figure is given by -
Your Answer is :-
Answer is :-
25. The voltage transfer ratio of two-port networks connected in cascade may be conveniently obtained from the -
Your Answer is :-
Answer is :-a) product of the individual ABCD matrices of the two networks
26. When a network has response with time as shown in fig. then which one of the following diagrams represents the location of the poles of this network ?
Your Answer is :-
Answer is :-
27. For the network shown in the given fig. the ratio is -
Your Answer is :-
Answer is :-
28. An attenuator drops a 10V signal to 50mv in an experiment. The loss in decibels is -
Your Answer 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 -
Your Answer is :-
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 -
Your Answer 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 -
Your Answer is :-
Answer is :-c) 15.8 W
32. Shannon’s law relates -
Your Answer is :-
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 -
Your Answer 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 ) -
Your Answer is :-
Answer is :-b) [ R+jL) (G+jc)] 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
Your Answer is :-
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 -
Your Answer is :-
Answer is :-b) 225 and 25 respectively
37. The degenerate modes in a wave guide are characterized by -
Your Answer is :-
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 -
Your Answer is :-
Answer is :-a) 30 0
39. The radiation pattern of Hertzian dipole in the plane perpendicular to the dipole is a -
Your Answer is :-
Answer is :-c) Figure of eight
40. Permeance is the -
Your Answer is :-
Answer is :-c) reciprocal of the reluctance
41. One of the following which is an active transducer is -
Your Answer is :-
Answer is :-d) Photo emission
42. The wein bridge uses only -
Your Answer is :-
Answer is :-d) Capacitors and Resistors.
43. The greater the value of Q -
Your Answer is :-
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 -
Your Answer is :-
Answer is :-d) stray fields.
45. Moving iron instruments -
Your Answer is :-
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 -
Your Answer is :-
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 -
Your Answer is :-
Answer is :-c) the armature current produces heating effect
48. Ideal transformer cannot be described by -
Your Answer is :-
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?
Your Answer is :-
Answer is :-b) 1 and 3
50. The function of the reference electrode in a pH meter is to -
Your Answer is :-
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
Your Answer is :-
Answer is :-b) 2 4 1 3
52. A thyristor during forward blocking state is associated with.-
Your Answer is :-
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 -
Your Answer is :-
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 -
Your Answer is :-
Answer is :-c) 10
55. In the performance of single phase and three phase full converters the effect of source inductance is to
Your Answer is :-
Answer is :-c) reduce the output voltage
56. The cycloconverters (CCs) require natural or forced commutation as under -
Your Answer is :-
Answer is :-c) forced commutation in step up CCs
57. Power transistors are more commonly of -
Your Answer is :-
Answer is :-a) silicon npn type.
58. C is a -
Your Answer is :-
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
Your Answer is :-
Answer is :-a) 5
60. (7F)16 + (BA)16 = (?)16-
Your Answer is :-
Answer is :-b) 139
61. Two’s complement of 3 bit nonzero linory number is some or original number is all bits accepts-
Your Answer is :-
Answer is :-a) MSB are zeros
62. The schematic circuits of RTL NOR gate is-
Your Answer is :-
Answer is :-
63. . Transistors with high frequency have -
Your Answer is :-
Answer is :-a) Thick base
64. Telephone traffic is specified in terms of -
Your Answer is :-
Answer is :-d) Erlangs
65. In a Hartley oscillator -
Your Answer is :-
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 -
Your Answer is :-
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 -
Your Answer is :-
Answer is :-c) Either saturation or cut off
68. Five 1 bit registers are referred as -
Your Answer is :-
Answer is :-a) Flags
69. Next binary number after 0,1, 10, 11 is -
Your Answer is :-
Answer is :-c) 100
70. Identify coincidence logic circuit in the following –
Your Answer is :-
Answer is :-a)
71. The output analog voltage Vo is given by -
Your Answer is :-
Answer is :-
72. . If an inverter is placed at the input to an SR flip flop, the result is -
Your Answer is :-
Answer is :-b) D flip flop
73. See the Root locus diagram of a system and the following statements :-
1. The open loop system is a second order system.
2. The system is over damped for
3. The system is absolutely stable for all value of R.
Which of these statements are correct?
Your Answer is :-
Answer is :-b) 1 and 3
74. For the transfer function G(S)H(S) = the phase cross over frequency is -
Your Answer is :-
Answer is :-b) 0.707 rad/sec
75. If the open loop transfer function of the system is G(S) H(S) =
then a closed loop pole will be located at S = -12 wher the value of K is -
Your Answer is :-
Answer is :-b) 5760
76. Considering the following open loop transfer function -
The correct sequence of these systems in increasing order of the time taken for the unit step response to settle is –
Your Answer is :-
Answer is :-c) 2, 3, 1
77. Considering unit feed back control system in the given figure, the ratio of time constant of closed loop response to open loop response will be -
Your Answer is :-
Answer is :-d) 2 : 3
78. Angle subtended by earth at geostationary communication satellite is -
Your Answer is :-
Answer is :-a) 17.340
79. For data transmission phase modulation is commonly used because -
Your Answer is :-
Answer is :-b) It is resistant to the effects of noise.
80. Several channels are interleaved and then transmitted together is known as –
Your Answer is :-
Answer is :-a) Frequency division multiplex
81. Identify the wrong statement-
The radar cross section of a target -
Your Answer is :-
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?
Your Answer is :-
Answer is :-b) 2, 3 and 4
83. In super heterodyne receivers double spotting is caused by -
Your Answer is :-
Answer is :-a) poor front-end rejection
84. The number of lines per field in the United States TV system is -
Your Answer is :-
Answer is :-a) 262 1/2
85. In a TV receiver the color killer -
Your Answer is :-
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 50. The inductance of the cable is-
Your Answer is :-
Answer is :-c) 0.1 H/m
87. Transmission of wave through Dominant mode is -
Your Answer 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 -
Your Answer is :-
Answer is :-c) Over coupled
90. The critical frequency is always -
Your Answer is :--
Answer is :-a) Lower than maximum usable frequency
91. The PIN diode based on -
Your Answer is :-
Answer is :-c) Negative resistance
92. Which antenna having circular polarization -
Your Answer is :-
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 -
Your Answer is :-
Answer is :-c) 10
94. In the 8085 mP, the RST 6 instruction transfers the program execution to the following location -
Your Answer is :-
Answer is :-a) 30 H
95. In instruction cycle first operation is -
Your Answer 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 -
Your Answer is :-
Answer is :-d) CMA
98. What happen when CALL instruction executed -
Your Answer is :-
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 -
Your Answer is :-
Answer is :-d) Accumulator
100. The decoder is a logic ckt that -
Your Answer is :-
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 -
Your Answer is :-
Answer is :-c) assiduous
102. As letter is alphabet so zodiac is -
Your Answer is :-
Answer is :-c) sign
103. What is the correct meaning of prudish.?
Your Answer is :-
Answer is :-a) careful
104. Pick out the odd matching with reference to number -
Your Answer is :-
Answer is :-b) hair – hairs
105. Choose the phrase that is most nearly similiar in meaning to the word given below-
Abut is
Your Answer is :-
Answer is :-d) Adjoin
106. The highest mountain peak in Indian Territory is -
Your Answer is :-
Answer is :-b) Kanchenjunga
107. German silver is an alloy comprising -
Your Answer is :-
Answer is :-a) Copper, Nickel and Zinc
108. Mughal Emperor Bahadur Shah Zafar’s mausoleum is in -
Your Answer is :-
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 -
Your Answer is :-
Answer is :-d) 2-1
111. Which planets in the solar system are known as ‘Inferior Planets’ -
Your Answer is :-
Answer is :-d) Mercury and Venus.
112. The largest Stupa in Southern India is at -
Your Answer is :-
Answer is :-b) Amravati
113. The new chairman and Managing Director of Industrial Finance Corporaton of India (IFCI) is -
Your Answer is :-
Answer is :-a) Mr. Vishwanath Prasad Singh
114. Which one is the latest among rock-cut temples?
Your Answer is :-
Answer is :-c) Elephanta
115. Number of organisations government ban in Jammu and Kashmir and the North East under the new ordinance ‘POTO’ is -
Your Answer is :-
Answer is :-d) 23
116. In bed of which river does Badrinath shrine stand?
Your Answer is :-
Answer is :-c) Alakananda
117. The nerve endings for the sense of sight are located in the part of the eye called the -
Your Answer is :-
Answer is :-d) Retina
118. Fundamental duties were introduced in the constitution by the -
Your Answer is :-
Answer is :-b) 42nd Amendment
119. The Khalsa Panth was founded by -
Your Answer is :-
Answer is :-d) Guru Govind singh
120. Number of countries involved in international fleet review hosted by India is -
Your Answer is :-
Answer is :-c) 29
BSNL JTO Exam 2005 - 5
Labels: BSNL JTO Exam 2005 - 5 |
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