Synchronous Motors When a synchronous motor is pulled out of synchronism, the stator current ________ Become zero Remains unchanged Is increased too much Is decreased too much Become zero Remains unchanged Is increased too much Is decreased too much ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The duration of sudden short circuit test on synchronous motor is usually about One minute One second One hour None of the listed here One minute One second One hour None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The efficiency of a properly designed synchronous motor will usually fall in range 85 to 95% 99 to 99.5% 75 to 80% 60 to 70% 85 to 95% 99 to 99.5% 75 to 80% 60 to 70% ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In case one phase of a three-phase synchronous motor is short-circuited the motor will run at 2/3 of synchronous speed run with excessive vibrations not start take less than the rated load run at 2/3 of synchronous speed run with excessive vibrations not start take less than the rated load ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors An over excited synchronous motor behaves as _____ A capacitor None of the listed here A resistor An inductor A capacitor None of the listed here A resistor An inductor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous machine with low value 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
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