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

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

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

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

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