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 applied voltage By changing the load By changing the supply frequency By interchanging any two phases By changing the applied voltage By changing the load By changing the supply frequency By interchanging any two phases ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The duration of sudden short circuit test on synchronous motor is usually about One second One hour None of the listed here One minute One second One hour None of the listed here One minute ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The efficiency of a properly designed synchronous motor will usually fall in range 60 to 70% 85 to 95% 99 to 99.5% 75 to 80% 60 to 70% 85 to 95% 99 to 99.5% 75 to 80% ANSWER DOWNLOAD EXAMIANS APP
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 synchronous motor has large air gap stator supply is relieved of responsibility of producing magnetic field synchronous motor runs at synchronous speed mechanical load on the motor can be adjusted synchronous motor has large air gap stator supply is relieved of responsibility of producing magnetic field synchronous motor runs at synchronous speed ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous machine with low value of short-circuit ratio has good voltage regulation lower stability limit good speed regulation high stability limit good voltage regulation lower stability limit good speed regulation high stability limit ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The size of a synchronous motor is determined by its _____ kW rating None of the listed here kVA rating kVAR rating kW rating None of the listed here kVA rating kVAR rating ANSWER DOWNLOAD EXAMIANS APP
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