Electrical Machines
Damper winding is used to

 increase the load current.
 suppress the hunting.
 decrease the load current.
 both 1 and 2.

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Electrical Machines
Cogging and crawling are phenomena associated with

 the former at a fraction of its rate speed and the latter during starting.
 cage induction machines and they are essentially the same.
 any of the above.
 the former during starting and the latter at a fraction of its rated speed.

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