Synchronous Motors If one phase of a 3 phase synchronous motor is short circuited, motor Will refused ro start Will not come upto speed Will overheat in spots Will fail to pull into step Will refused ro start Will not come upto speed Will overheat in spots Will fail to pull into step ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The rotor of synchronous motor is excited with direct current when the motor _____ Approches synchronous speed Is at standstill None of the listed here Approches half synchronous speed Approches synchronous speed Is at standstill None of the listed here Approches half synchronous speed ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A 50 Hz synchronous motor runs at 200 rpm. The number of salient poles on the rotor are______ 30 16 36 None of the listed here 30 16 36 None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Slip rings in a synchronous motor carry All of the listed here No current Direct current Alternating current All of the listed here No current Direct current Alternating current ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When a synchronous motor is pulled out of synchronism, the stator current ________ Become zero Remains unchanged Is decreased too much Is increased too much Become zero Remains unchanged Is decreased too much Is increased too much ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The pull out torque of a practical synchronous motor will occur when the torque angle is about _____ 0° 30° 75° 45° 0° 30° 75° 45° ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS