Synchronous Motors When a synchronous motor is on no load, the torque angle is about ________ 90° electrical 45° electrical 30° electrical 0° electrical 90° electrical 45° electrical 30° electrical 0° electrical ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors An important advantage of a synchronous motor over wound round induction motor is that its speed is independent of supply frequency its speed may be controlled more easily its power factor may be varied at will None of these its speed is independent of supply frequency its speed may be controlled more easily its power factor may be varied at will None of these ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The pull out torque of a synchronous motor will ______ as the field excitation is increased. Decrease Remain unchanged Increase None of the listed here Decrease Remain unchanged Increase None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In case one phase of a three-phase synchronous motor is short-circuited the motor will take less than the rated load run at 2/3 of synchronous speed run with excessive vibrations not start take less than the rated load run at 2/3 of synchronous speed run with excessive vibrations not start ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When the field of a synchronous motor is under-excited, the power factor will be lagging zero unity leading lagging zero unity leading ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Change of D.C. excitation of a synchronous motor changes Power factor of power drawn by the motor Any of the above Motor speed Applied voltage of the motor Power factor of power drawn by the motor Any of the above Motor speed Applied voltage of the motor ANSWER DOWNLOAD EXAMIANS APP
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