Synchronous Motors Synchronous motors are generally used in application requiring _______ Sudden application of heavy loads Frequent stopping Variable speed Infrequent starting Sudden application of heavy loads Frequent stopping Variable speed Infrequent starting ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor runs at only one speed because it ______ Has no losses 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 ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The direction of rotation of a synchronous motor can be reversed by reversing, None of the listed here Current to field winding Supply phase sequence Polarity of rotor poles None of the listed here Current to field winding Supply phase sequence Polarity of rotor poles ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In case one phase of a three-phase synchronous motor is short-circuited the motor will run with excessive vibrations run at 2/3 of synchronous speed take less than the rated load not start run with excessive vibrations run at 2/3 of synchronous speed take less than the rated load not start ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors An over excited synchronous motor behaves as _____ None of the listed here A capacitor An inductor A resistor None of the listed here A capacitor An inductor A resistor 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. 2 0.5 5 6 2 0.5 5 6 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS