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 A synchronous motor will always stop when Supply voltage fluctuates Load in motor varies Supply voltage frequency changes Excitation winding gets disconnected Supply voltage fluctuates Load in motor varies Supply voltage frequency changes Excitation winding gets disconnected ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The speed of a synchronous motor can be changed by varying _______ None of the listed here Field excitation Supply frequency Mechanical load None of the listed here Field excitation Supply frequency Mechanical load ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When the field of a synchronous motor is under-excited, the power factor will be leading unity zero lagging leading unity zero lagging ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors If one phase of a 3 phase synchronous motor is short circuited, motor Will refused ro start Will fail to pull into step Will not come upto speed Will overheat in spots Will refused ro start Will fail to pull into step Will not come upto speed Will overheat in spots ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor working at leading power factor can be used as Voltage booster Phase advancer Noise generator Mechanical synchronizer Voltage booster Phase advancer Noise generator Mechanical synchronizer ANSWER DOWNLOAD EXAMIANS APP