Synchronous Motors The pull out torque of a synchronous motor will ______ as the field excitation is increased. Increase Remain unchanged None of the listed here Decrease Increase Remain unchanged None of the listed here Decrease ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor connected to infinite bus-bars has at constant full load, 100% excitation and unity power factor. On changing the excitation only, the armature current will have no change of power factor lagging power factor with over-excitation leading power factor with under-excitation leading power factor with over-excitation no change of power factor lagging power factor with over-excitation leading power factor with under-excitation leading power factor with over-excitation ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The speed of a synchronous motor None of the listed here Decreases as the load decreases Always remains constant Increases as the load increases None of the listed here Decreases as the load decreases Always remains constant Increases as the load increases ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The standard full-load power factor ratings for synchronous motors are zero or 0.8 leading unity or 0.8 leading unity or zero unity or 0.8 lagging zero or 0.8 leading unity or 0.8 leading unity or zero unity or 0.8 lagging ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The back emf in the stator of a synchronous motor depends on Rotor excitation Flux density None of the listed here Rotor speed Rotor excitation Flux density None of the listed here Rotor speed ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When a unity pf synchronous motor is operated at a leading pf, it results in _______ None of the listed here More than rated horseppwer output Less than rated horsepower output More than rated rotor current None of the listed here More than rated horseppwer output Less than rated horsepower output More than rated rotor current ANSWER DOWNLOAD EXAMIANS APP
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