Synchronous Motors The magnitude of field flux in a 3-phase synchronous motor Varies with speed Varies with power factor Remains constant at all loads Varies with the load Varies with speed Varies with power factor Remains constant at all loads Varies with the load 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 normal load with minimum excitation no-load and under-excited fields normal load with zero excitation no-load and greatly over-excited fields normal load with minimum excitation no-load and under-excited fields ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When pull-out torque occurs in a synchronous motor, the poles of the rotor are _______ Mid way between N and S poles of stator Coincident with statorbpoles 45° (electrical) behind stator poles None of the listed here Mid way between N and S poles of stator Coincident with statorbpoles 45° (electrical) behind stator poles None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The speed of a synchronous motor Decreases as the load decreases None of the listed here Increases as the load increases Always remains constant Decreases as the load decreases None of the listed here Increases as the load increases Always remains constant ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors If one phase of a 3 phase synchronous motor is short circuited, motor Will refused ro start Will overheat in spots Will fail to pull into step Will not come upto speed Will refused ro start Will overheat in spots Will fail to pull into step Will not come upto speed ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Power factor of a synchronous motor is unity when The armature current is zero None of the listed here The armature current is maximum The armature current is minimum The armature current is zero None of the listed here The armature current is maximum The armature current is minimum ANSWER DOWNLOAD EXAMIANS APP
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