BSNL –JTO SAMPLE PAPER-1

BSNL –JTO SAMPLE PAPER (conts)

51. Match the given controlled rectifiers with 50 Hz supply
a.)1 phase full converter with source inductance
b.)3 phase full converter
c.)3 phase semiconductor
d.)3 phase halls wave converter

52. For natural or forced commutation the cyclo converters (CCs) requires 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

53. The peak inverse voltage in ac to dc converter system is highest in-
a). single phase full wave mid point converter
b). single phase full converter
c) 3 phase bridge converter
d). 3 phase half wave converter.


54. A single phase full converter feeds power to RLE load with R = 6 W L = 6 MH and E = 60 V. The ac source voltage is 230 V, 50 Hz, For continuous conduction, the average value of load current for a firing angle delay of 50 is
a.) 12.181 A
b). 14.81 A
c). 16.76 A
d.) 32.40 A

55. What is 2's complement of 00011100-
a.) 11100011
b.) 10001100
c.) 11100100
d.) 10000111

56. In C programming a expression contains relational operators, assignment operators and arithmetic operators if parentheses is absent then execution follows
a.) assignment, relational, arithmatic
b.) arithmatic, relational, assignment
c.) relational, arithmatic, assignment
d.) assignment, arithmatic, relational

57. In semiconductor memory information stored in form-
a.) binary
b.) hexadecimal
c.) octal
d.) ASCII

58. I\p to Not gate gives o/p as-
a ) inversion of some bits
b.) 2's complement of i\p
c.) 1's complement of i\p
d.) o/p is some as i\p

59. A negative logic means-
a ) logic 0 and 1 are represented by a +ve voltage respective
b). logic 0 and 1 are presented as –ve and +ve voltage
c.) logic 0 voltage is higher than logic 1 voltage level
d.) logic 0 voltage is lower than logic 1 voltage level

60. For designing D flip flop from SR FF a circuit is aloud at 01p of SR FF is-
a.) AND
b.) OR
c.) NOR
d.) NOT

61.A 20,000 Ohms per volt meter will deflect full-scale with a current of -
a.) 50 mA
b.) 50 mA
c.) 100 mA
d.) 1000 mA

62. A plate modulated class –CRF power amplifier produces 100 KW of radiated power at 100 % modulation. The modulating audio amplifier supplies approximately -------- kW of this power-
a.) 50
b) 33
c) 22
d) 11

63. An amplifier without feedback has a distortion of 15 % and gain of 40. When 10% negative feedback is applied the distortion will become-
a.) 50 %
b) -45 %
c) 3%
d) -5%

64. MODEM implies-
a.) Modulator at transmitting side and ditector at the receiving side
b.) Which deals with analog signals and shows digital information
c.) Analog to digital at transmitting side and digital to analog at a receiving side
d) A device which deals with digital signals only

65. Twisted ring and ring counters are examples of –
a.) Synchronous counters
b.) Asynchronous counters
c.) both a and b
d.) None of the above

66. Specify Non characteristic flip flop in the following –
a.) The outputs are complement of each other
b.) The flip flop has two input signals
c.) The flip flop has two output signals
d). The flip flop is a bistable devise with only two stable states

67. The voltage obtained when digital input is 001 is a 3 bit R-2R ladder DIA converter is-
a.) VR/22
b.) VR/21
c.) VR/23
d.) none of the above

68. Identify NOT an octal number-
a.) 19
b). 15
c.) 77
d.) 101

69. The set of binary digits 01000100 represents-
a.) number 6810 in a pure binary computer
b.) number 44 in 8421 BCD code
c) Both a and b
d.) None of the above

70. The system matrix of a continuous time system, described in the state variable form is
The system is stable for all values of x and y satisfying –
a.) x < 1/2, y < 1/2
b). x < 0, y < 2
c.) x > 1/2, y >0
d.) x < 0, y < 1/2

71. The break away and break in point in the root locus for open loop transfer function G(S) H(S) = are located respectively at –
a). –2 and -1
b). –2.47 and –3.77
c.) –4.27 and –7.73
d.) –7.73 and –4.27

72. The overall transfer function in a second order is given by-
Its resonant frequency is -

73. The detection of an AM waveform in an Envelope –
a.) One side band and full amplitude carrier are needed
b.) Both side bands and full amplitude carrier are needed
c) Only two side bands are needed
d). Upper side band and part of carriers are needed

74. Satellite used for intercontinental communication is known as –
a.) Comsat
b.) Dom sat
c.) Mari sat
d). Intelsat

75. Mark out non submarine cable –
a.) TAT – 7
b.) INTELSAT V
c.) ATLANTIS
d.) CANTAT 2

76. The capacity of an analog communication channel with 4kHz bandwidth and 15 dB SNR is approximately-
a). 20,000 bps
b). 16,000 bps
c.) 10,000 bps
d.) 8,000 bps

77. The blind speed of an MTl radar can be avoided by changing the-
a.) Carrier frequency
b.) Pulse repetition frequency
c.) Antenna rotation rate
d.) Transmitted power

78. The output voltage in a feedback series regulator circuit is regulated by controlling the-
a.) Magnitude of the input voltage
b.) Gain of the feedback transistor
c.) Reference voltage
d.) Voltage drop across the series pass transistor

79. Indicate the signal not transmitted in colour TV-
a.) Y
b.) Q
c.) R
d.) I

80. As frequency of signal increases-
a.) Directivity increases & beam width increases
b.) Directivity & beam width decreases
c.) Directivity increases & beam width decreases
d.) Directivity decreases & beam width increases

81. The number of hardware interrupts (which require an external signal to interrupt) present in on 8085 mP are
a). 1
b). 4
c.) 5
d.) 13

82. Highest priority interrupt is-
a.) INTR
b.) RST 7.5
c.) RST 6.5
d.) TRAP

83. One instruction cycle means-
a.)Time require to execute set of instructions
b.)Time require to execute one instruction
c.) Time require to complete one operation of accessing memory, or I/o
d.) None of above

84. If the clock freq. is 5 mH3 how much time is required to execute on instruction of 18 T-states-
a.)3.6 msec.
b.) 36 msec.
c.) 36 msec.
d.) 36 sec.

85. In data transfer operation which flog get affected-
a. ) zero flog
b. ) carry flog
c. ) sign flog.
d.) none

86. CMP instruction comes under group -
a.) Data transfer
b.) Brouching operations
c). Machine control operation
d.) logical operations

87. The logic operation-
a).can be performed directly with content of the register.
b.) are performed without content of a
c.)none of above.

88. What happen when PUSH 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

89. SIM stands for-
a.) serial interface memory
b.) set interrupt mask
c.) set if minus
d.) set internal memory

90. Maximum clock frequency required to operate 8085-
a.) 2 MHz
b.) 3 MHz
c) 6 MHz
d.) 9 MHz

91. ASCII code is-
a). 7 bit
b). 8 bit
c)16 bit
d.) 32 bit.

92. In memory mapped I/O address lines are-
a.) 8
b) 16
c) 32
d) 64

93. The parity bit adding technique is used for -
a.) Indexing
b.) Coding
c.) Error detection
d.) Controlling

94. A demultiplexer-
a.) has multiple i/p and single o/p
b.) has single i/p and multiple o/p
c.) has multiple i/p and multiple o/p
d.) has single i/p and single o/p


95. Subroutines are useful-
a) to reduce storage requirements
b) to increase programming speed and reduce storage
c) most applications are same
d.) but increases expense

96. As daring goes with temerity same way clear-sighted with –
a.) Perspicacity
b.) Impulsiveness
c.) Energy
d.) Clemency

97. A man who visits his friend is a –
a.) Host
b.) Guest
c.) Master
d.) Owner

98. Zealot is –
a)beginner
b) Patron
c.) fanatic
d.) Murderer

99.ive the plural of 'Mouse' –
a.) Mouse's
b). Mice
c). Mouse
d). None

100Find the part of speech of the underlined word –
Shama and Radha were playing together.
a.) reposition.
b.) Noun
c.) Conjunction.
d) Verb.