Measurement and Instrumentation - Interview Questions | Exam2Win

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71. The rectifier instrument is not free from

A. temperature error

B. wave shape error

C. frequency error

D. all of the above

Explanation:

72. Wattmeter cannot be designed on the principle of

A. electrostatic instrument

B. thermocouple instrument

C. moving iron instrument

D. electrodynamic instrument

Explanation:

73. Volt box is a component to

A. extend voltage range

B. measure voltage

C. compare voltage in a box

D. none of the above

Explanation:

74. Commonly used instruments in power system measurement are

A. induction

B. moving coil or iron

C. rectifier

D. electrostatic

Explanation:

75. Two holes in the disc of energymeter are drilled at the opposite sides of the spindle to

A. improve its ventilation

B. eliminate creeping at no load

C. increase its deflecting torque

D. increase its braking tcrque

Explanation: