measurement and instrumentation MCQs – Page 4

Practise focused measurement and instrumentation questions with marked answers for exam preparation and subject revision.

measurement and instrumentation Mcqs

61. A Weston frequency meter is_____________?
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A. moving iron instrument

B. dynamometer instrument

C. moving coil instrument

D. none of the above

62. In an Anderson bridge, the unknown inductance is measured in terms of_______________?
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A. known capacitance and resistance

B. known inductance and resistance

C. known resistance

D. known inductance

63. An instrument transformer is used to extend the range of______________?
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A. electrostatic instrument

B. induction instrument

C. moving coil instrument

D. any of the above

64. The resistance in the circuit of the moving coil of a dynamometer wattmeter should be_____________?
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A. high

B. almost zero

C. low

D. none of the above

65. The principle on which vector voltmeter is based is_____________?
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A. that it measures the amplitude of a single at two points and at the same time measures their phase difference

B. that it measures the response of linear ramp voltage

C. same as digital meter

D. that it works on the principle of complex variation

66. The scale of a rectifier instrument is_________________?
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A. neither A. nor B.

B. either A. or B.

C. non-linear

D. linear

67. In a 3-phase power measurement by two wattmeter method the reading of one of the wattmeter was zero. The power factor of the load must be_______________?
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A. zero

B. 0.3

C. 0.5

D. unity

68. The disc of an instrument using eddy current damping should be of________________?
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A. non-conducting and magnetic material

B. none of the above

C. conducting and non-magnetic material

D. conducting and magnetic material

69. In a Weston synchronoscope, the fixed coils are connected across_______________?
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A. none of the above

B. incoming alternator

C. a lamp

D. bus-bars

70. Which of the following essential features is possessed by an indicating instrument ?
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A. Deflecting device

B. All of the above

C. Damping device

D. Controlling device

71. An induction wattmeter can be used for_________________?
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A. both D.C. and A.C.

B. D.C. only

C. A.C. only

D. any of the above

72. For measurement of mutual inductance we can use________________?
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A. Heaviside bridge

B. Any of the above

C. Anderson bridge

D. Maxwells bridge

73. An ohmmeter is a____________?
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A. moving coil instrument

B. dynamometer instrument

C. none of the above

D. moving iron instrument

74. In a Weston frequency meter, the magnetic axes of the two fixed coils are__________________?
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A. inclined at 60

B. perpendicular

C. parallel

D. inclined at 120

75. The power of a n-phase circuit can be measured by using a minimum of_______________?
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A. (n + 1) wattmeter elements

B. (n 1) wattmeter elements

C. n wattmeter elements

D. 2n wattmeter elements

76. A direct current can be measured by________________?
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A. a D.C. potentiometer directly

B. none of the above

C. a D.C. potentiometer in conjunction with a volt ratio box

D. a D.C. potentiometer in conjunction with a standard resistance

77. The household energy meter is_______________?
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A. an indicating instrument

B. an integrating instrument

C. none of the above

D. a recording instrument

78. An ammeter is a______________?
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A. recording instrument

B. integrating instrument

C. secondary instrument

D. absolute instrument

79. Most common form of A.C. meters met with in every day domestic and industrial installations are______________?
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A. induction type single phase energy meters

B. mercury motor meters

C. all of the above

D. commutator motor meters

80. Various adjustments in an energy meter include_______________?
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A. temperature compensation

B. overload and voltage compensation

C. light load or friction

D. lag and creep

E. all of the above

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