Important Measuring Instruments Multiple Choice Questions and Answers

36. In a portable instrument, the controlling torque is provided by

   A.Spring

   B.Gravity

   C.Eddy currents

   D.All of the above

37. 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

38. The switch board instruments

   A.Should be mounted in vertical position

   B.Should be mounted in horizontal position

   C.Either (a) or (b)

   D.Neither (a) or (b)

39. Operating torques in analogue instruments are

   A.Deflecting and control

   B.Deflecting and damping

   C.Deflecting, control and damping

   D.Vibration and balancing

40. Commonly used instruments in power system measurement are

   A.Induction

   B.Moving coil or iron

   C.Rectifier

   D.Electrostatic

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