Synchronous Motors The pull out torque of a practical synchronous motor will occur when the torque angle is about _____ 45° 75° 30° 0° 45° 75° 30° 0° ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The rotor of a synchronous motor is None of the listed here Nonsalient pole type Identical to that of a dc motor Salient pole type None of the listed here Nonsalient pole type Identical to that of a dc motor Salient pole type ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors As the load is applied to a synchronous motor, the motor takes more armature current because The rotor by shifting its phase backward causes motor to take more current The rotor strengthens the rotating field causing more motor current The increased load has to take more current The back e.m.f. decreases causing an increase in motor current The rotor by shifting its phase backward causes motor to take more current The rotor strengthens the rotating field causing more motor current The increased load has to take more current The back e.m.f. decreases causing an increase in motor current ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The duration of sudden short-circuit test on a synchronous motor is usually about None of these one minute one second one hour None of these one minute one second one hour ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Most of the synchronous motors are _______ power factor metors. Unity 0.8 lagging 0.5 leading 0.8 leading Unity 0.8 lagging 0.5 leading 0.8 leading ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The operating speed of a synchronous motor can be changed to new fixed value by changing frequency changing the supply voltage changing the load using brakes changing frequency changing the supply voltage changing the load using brakes ANSWER DOWNLOAD EXAMIANS APP
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