DGVCL Exam Paper (11-12-2011)
The form factor in AC means the ration of

R.M.S. value to peak value
Peak value to r.m.s value
Peak value to average value
R.M.S. value to average value

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DGVCL Exam Paper (11-12-2011)
Hysteresis in an instrument means

The inaccuracy due to change in temperature
The change in the same reading when the input is first increased and then decreased
The reliability of the instrument
The repeatability of the instrument

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DGVCL Exam Paper (11-12-2011)
The purpose of embedding the damper winding in the pole face of a synchronous motor is to

Reduce winding losses
Reduce bearing friction
Eliminate hunting and provide adequate starting torque
Eliminate losses on account of fair friction

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