Synchronous Motors Synchronous motors are generally used in application requiring _______ Infrequent starting Frequent stopping Variable speed Sudden application of heavy loads Infrequent starting Frequent stopping Variable speed Sudden application of heavy loads ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor runs at only one speed because it ______ Has a damper winding None of the listed here Is a doubly fed machine Has no losses Has a damper winding None of the listed here Is a doubly fed machine Has no losses ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors By which of the following methods the constant speed of a synchronous motor can be changed to new fixed value ? By changing the load By changing the applied voltage By changing the supply frequency By interchanging any two phases By changing the load By changing the applied voltage By changing the supply frequency By interchanging any two phases ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor is a ______ motor. Singly fed Variable speed None of the listed here Variable pf Singly fed Variable speed None of the listed here Variable pf ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a synchronous motor which loss varies with load ? Copper loss Core loss Bearing friction loss Windage loss Copper loss Core loss Bearing friction loss Windage loss ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a 3-phase synchronous motor, the negative phase sequence exists when the motor is over-loaded supplied with unbalanced voltage None of these under-loaded over-loaded supplied with unbalanced voltage None of these under-loaded ANSWER DOWNLOAD EXAMIANS APP
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