Synchronous Motors The magnitude of field flux in a 3-phase synchronous motor Remains constant at all loads Varies with speed Varies with the load Varies with power factor Remains constant at all loads Varies with speed Varies with the load Varies with power factor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When load on a synchronous motor is increased, its armature current is increased provided, it is ______ Over-excited All of these Normally excited Under-excited Over-excited All of these Normally excited Under-excited ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Change of D.C. excitation of a synchronous motor changes Motor speed Any of the above Power factor of power drawn by the motor Applied voltage of the motor Motor speed Any of the above Power factor of power drawn by the motor Applied voltage of the motor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When the field of a synchronous motor is under-excited, the power factor will be leading zero lagging unity leading zero lagging unity ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors For reciprocating compressor, the synchronous motor is designed to have pull in torque of about ______ times the full load torque. 0.5 6 5 2 0.5 6 5 2 ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Power factor of a synchronous motor is unity when None of the listed here The armature current is zero The armature current is minimum The armature current is maximum None of the listed here The armature current is zero The armature current is minimum The armature current is maximum ANSWER DOWNLOAD EXAMIANS APP
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