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Measurement and Instrumentation - Interview Questions and Answers

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1. The chemical effect of current is used in
A. D.C. ammeter hour meter
B. D.C. ammeter
C. D.C. energy meter
D. none of the above
Explanation:
2. The disc of an instrument using eddy current damping should be of
A. conducting and magnetic material
B. non-conducting and magnetic material
C. conducting and non-magnetic material
D. none of the above
Explanation:
3. The pointer of an indicating instrument should be
A. very light
B. very heavy
C. either (a) or (b)
D. neither (a) nor (b)
Explanation:
4. Most common form of A.C. meters met with in every day domestic and industrial installations are
A. mercury motor meters
B. commutator motor meters
C. induction type single phase energy meters
D. all of the above
Explanation:
5. Which of the following are integrating instruments ?
A. Ammeters
B. Voltmeters
C. Wattmeters
D. Ampere-hour and watt-hour meters
Explanation:
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