Synchronous Motors The power factor of a synchronous motor is better than that of induction motor because mechanical load on the motor can be adjusted stator supply is relieved of responsibility of producing magnetic field synchronous motor has large air gap synchronous motor runs at synchronous speed mechanical load on the motor can be adjusted stator supply is relieved of responsibility of producing magnetic field synchronous motor has large air gap synchronous motor runs at synchronous speed ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The duration of sudden short-circuit test on a synchronous motor is usually about one minute None of these one second one hour one minute None of these one second one hour ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When the synchronous motor is pulled out of synchronism, the stator current _______ Is decreased too much Is increased too much Becomes zero Remains unchanged Is decreased too much Is increased too much Becomes zero Remains unchanged ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous machine with low value of short-circuit ratio has good voltage regulation high stability limit lower stability limit good speed regulation good voltage regulation high stability limit lower stability limit good speed regulation ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Hunting in a synchronous motor cannot be due to variable frequency windage friction variable load variable supply voltage variable frequency windage friction variable load variable supply voltage ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When pull-out torque occurs in a synchronous motor, the poles of the rotor are _______ Mid way between N and S poles of stator 45° (electrical) behind stator poles Coincident with statorbpoles None of the listed here Mid way between N and S poles of stator 45° (electrical) behind stator poles Coincident with statorbpoles None of the listed here ANSWER DOWNLOAD EXAMIANS APP
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