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 not start take less than the rated load run with excessive vibrations run at 2/3 of synchronous speed not start take less than the rated load run with excessive vibrations ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor working at leading power factor can be used as Mechanical synchronizer Phase advancer Voltage booster Noise generator Mechanical synchronizer Phase advancer Voltage booster Noise generator ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The duration of sudden short circuit test on synchronous motor is usually about One second None of the listed here One minute One hour One second None of the listed here One minute One hour ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Power factor of a synchronous motor is unity when The armature current is minimum The armature current is zero None of the listed here The armature current is maximum The armature current is minimum The armature current is zero None of the listed here The armature current is maximum ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The construction of a synchronous motor resembles a rotary converter an alternator a series motor an induction motor a rotary converter an alternator a series motor an induction motor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The armature current of the synchronous motor has higher values for Low excitation only None of the listed here Both higher and low excitation Higher excitation only Low excitation only None of the listed here Both higher and low excitation Higher excitation only ANSWER DOWNLOAD EXAMIANS APP
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