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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B.Current transformers

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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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C.kWh

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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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A.D.C. ammeter hour meter

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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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E.All of the above

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