Important Measuring Instruments Multiple Choice Questions and Answers
46. An induction meter can handle current upto
A.10 A
B.30 A
C.60 A
D.100 A
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D.100 A
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47. For handling greater currents induction wattmeters are used in conjunction with
A.Potential transformers
B.Current transformers
C.Power transformers
D.Either of the above
E.None of the above
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48. Induction type single phase energy meters measure electric energy in
A.kW
B.Wh
C.kWh
D.VAR
E.None of the above
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49. 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
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50. Which of the following properties a damping oil must possess
A.Must be a good insulator
B.Should be non-evaporating
C.Should not have corrosive action upon the metal of the vane
D.The viscosity of the oil should not change with the temperature
E.All of the above
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