Synchronous Motors If the field circuit of an unloaded salientpole synchronous motor gets suddenly open-circuited, then it runs at a very high speed the motor stops it runs at a slower speed it continues to run at the same speed it runs at a very high speed the motor stops it runs at a slower speed it continues to run at the same speed ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Synchronous motor always run at None of the listed here Less than synchronous speed More than synchronous speed The synchronous speed None of the listed here Less than synchronous speed More than synchronous speed The synchronous speed ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor can operate at Leading power factor Unity power factor only Lagging power factor only Lagging, leading and unity power factors Leading power factor Unity power factor only Lagging power factor only Lagging, leading and unity power factors ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The rotor of synchronous motor is excited with direct current when the motor _____ None of the listed here Is at standstill Approches synchronous speed Approches half synchronous speed None of the listed here Is at standstill Approches synchronous speed Approches half synchronous speed ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When a synchronous motor is pulled out of synchronism, the stator current ________ Become zero Is increased too much Remains unchanged Is decreased too much Become zero Is increased too much Remains unchanged Is decreased too much ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The armature current of the synchronous motor has higher values for Both higher and low excitation None of the listed here Low excitation only Higher excitation only Both higher and low excitation None of the listed here Low excitation only Higher excitation only ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS