Synchronous Motors In a 3-phase synchronous motor, the negative phase sequence exists when the motor is under-loaded None of these supplied with unbalanced voltage over-loaded under-loaded None of these supplied with unbalanced voltage over-loaded ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor runs at only one speed because it ______ None of the listed here Has a damper winding Is a doubly fed machine Has no losses None of the listed here Has a damper winding Is a doubly fed machine Has no losses ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The armature current of a synchronous motor will be minimum for ______ power factor. 0.8 lagging 0.8 leading Unity None of the listed here 0.8 lagging 0.8 leading Unity None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When a synchronous motor is on no load, the torque angle is about ________ 0° electrical 90° electrical 45° electrical 30° electrical 0° electrical 90° electrical 45° electrical 30° electrical ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The operating speed of a synchronous motor can be changed to new fixed value by changing the load changing the supply voltage using brakes changing frequency changing the load changing the supply voltage using brakes changing frequency ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The ratio of starting torque to running torque in a synchronous motor is Zero One Two Infinity Zero One Two Infinity ANSWER DOWNLOAD EXAMIANS APP
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