Synchronous Motors When the field of a synchronous motor is under-excited, the power factor will be zero leading unity lagging zero leading unity lagging ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The pull out torque of a practical synchronous motor will occur when the torque angle is about _____ 75° 0° 30° 45° 75° 0° 30° 45° ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors An important advantage of a synchronous motor over wound round induction motor is that None of these its speed may be controlled more easily its power factor may be varied at will its speed is independent of supply frequency None of these its speed may be controlled more easily its power factor may be varied at will its speed is independent of supply frequency ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous machine with low value of short-circuit ratio has good voltage regulation high stability limit good speed regulation lower stability limit good voltage regulation high stability limit good speed regulation lower stability limit ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor is cheaper than 3-phase induction motor for _____ High speed, high output High speed, low output Low speed, high output None of the listed here High speed, high output High speed, low output Low speed, high output None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Damper winding in a synchronous motor________ Improve pf of the motor Serves to start the motor Reduces windage losses Increases hunting of the motor Improve pf of the motor Serves to start the motor Reduces windage losses Increases hunting of the motor ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS