To achieve sparkless commutation brushes of a D.C. generator are rockedm ahead so as to bring them?

Related Mcqs:

Laminations of core are generally made of________________?

A. case iron B. carbon C. silicon steel D. stainless steel...

D.C. generators are connected to the busbars or disconnected from them only under the floating condition________________?

A. to avoid sudden loading of the primemover B. to avoid mechanicaljerk to the shaft C. to avoid burning of switch contacts D. all above...

In D.C. generators, lap winding is used for______________?

A. high voltage, high current B. low voltage, high current C. high voltage, low current D. low voltage, low current...

In over compounded generator, full load terminal voltage is______________?

A. almost zero B. less than no load terminal voltage C. more than no load terminal voltage D. equal to no-load terminal voltage...

With a D.C. generator which of the following regulation is preferred ?

A. 100% regulation B. infinite regulation C. 50% regulation D. 1% regulation...