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

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

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DGVCL Exam Paper (11-12-2011)
Distribution transformers have good all day efficiency due to

Low iron loss
Low copper as well as iron loss
Low voltage
Low copper loss

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DGVCL Exam Paper (11-12-2011)
The purpose of interpoles in DC machines is to nullify

The reactance voltage
The cross-magnetizing effect of armature mmf
The demagnetizing effect of armature mmf
Both the cross-magnetizing mmf and the reactance voltage

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DGVCL Exam Paper (11-12-2011)
The purpose of skewing of rotor slots in an induction motor is

To reduce the locking tendency of the rotor
To increase the breadth factor
To reduce the magnetic hum of the motor
To increase the distributuion factor

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