Synchronous Motors Change of D.C. excitation of a synchronous motor changes Power factor of power drawn by the motor Applied voltage of the motor Motor speed Any of the above Power factor of power drawn by the motor Applied voltage of the motor Motor speed Any of the above ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When load on a synchronous motor is increased, its armature current is increased provided, it is ______ Under-excited All of these Over-excited Normally excited Under-excited All of these Over-excited Normally excited ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Small synchronous motors are started by _______ Damper winding None of the listed here Variable frequency source Pony motor Damper winding None of the listed here Variable frequency source Pony motor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors For power factor correction, synchronous motors operate at normal load with zero excitation no-load and greatly over-excited fields no-load and under-excited fields normal load with minimum excitation normal load with zero excitation no-load and greatly over-excited fields no-load and under-excited fields normal load with minimum excitation ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as pull-in torque pull-up torque None of these pull-out torque pull-in torque pull-up torque None of these pull-out torque ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The armature current of a synchronous motor will be minimum for ______ power factor. Unity 0.8 lagging None of the listed here 0.8 leading Unity 0.8 lagging None of the listed here 0.8 leading ANSWER DOWNLOAD EXAMIANS APP
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