measurement and instrumentation MCQs – Page 5

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

measurement and instrumentation Mcqs

81. Which of the following essential features is possessed by an indicating instrument?
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A. All of the above

B. Controlling device

C. Deflecting device

D. Damping device

82. E.m.f. of a Weston cell is accurately measured by________________?
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A. electrostatic voltmeter

B. isothermal voltmeter

C. hot wire voltmeter

D. electrodynamic voltmeter

83. Standard resistor is made from_________________?
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A. nichrome

B. maganin

C. silver

D. platinum

84. For measurement of inductance having high value, we should use______________?
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A. Maxwells bridge

B. Any of the above

C. Maxwell Wein bridge

D. Hays bridge

85. Which of the following meters are not used on D.C. circuits______________?
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A. Commutator motor meters

B. Mercury motor meters

C. Induction meters

D. None of the above

86. In order to achieve high accuracy, the slide wire of a potentiometer should be_______________?
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A. neither too small not too large

B. very thick

C. as long as possible

D. as short as possible

87. Volt box is a component to_____________?
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A. none of the above

B. compare voltage in a box

C. extend voltage range

D. measure voltage

88. Which of the following is measured by using a vector voltmeter ?
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A. All of the above

B. Amplifier gain and phase shift

C. Complex insersion loss

D. Filler transfer functions

89. In a single phase power factor meter the phase difference between the currents in the two pressure coils is___________________?
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A. approximately 0

B. exactly 90

C. exactly 0

D. approximately 90

90. When a capacitor was connected to the terminal of ohmmeter, the pointer indicated a low resistance initially and then slowly came to infinity position. This shows that capacitor is____________?
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A. faulty

B. all right

C. short-circuited

91. The spring material used in a spring control device should have the following property?
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A. Most be of low temperature co-efficient

B. Should not be subjected to fatigue

C. All of the above

D. Should be non-magnetic

E. Should have low specific resistance

92. Which of the following are integrating instruments ?
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A. Voltmeters

B. Ammeters

C. Wattmeters

D. Ampere-hour and watt-hour meters

93. Alternating current is measured by_______________?
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A. permanent magnet type ammeter

B. moving iron repulsion type voltmeter

C. electrostatic ammeter

D. induction ammeter

94. Wagner earthing device is used to eliminate errors due to________________?
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A. electrostatic coupling

B. electromagnetic coupling

C. both A. and B.

D. none of the above

95. The gravity controlled instrument has crowded scale because current is proportional to________________?
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A. sine of deflection angle

B. deflection angle

C. balancing weight

96. In a Schering bridge the potential of the detector above earth potential is______________?
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A. a few volts only

B. 5 kV

C. 10 kV

D. 1 kV

97. A voltage of about 200 V can be measured__________________?
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A. a D.C. potentiometer in conjunction with a volt ratio box

B. directly by a D.C. potentiometer

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

D. none of the above

98. For measuring a very high resistance we should use_______________?
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A. Wheat stone bridge

B. Meggar

C. Kelvins double bridge

D. None of the above

99. The switch board instruments________________?
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A. either A. or B.

B. should be mounted in vertical position

C. neither A. nor B.

D. should be mounted in horizontal position

100. A potentiometer may be used for_________________?
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A. measurement of resistance

B. measurement of current

C. calibration of voltmeter

D. calibration of ammeter

E. all of the above

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