Synchronous Motors Synchronous motors are generally used in application requiring _______ Variable speed Frequent stopping Sudden application of heavy loads Infrequent starting Variable speed Frequent stopping Sudden application of heavy loads Infrequent starting ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The ratio of starting torque to running torque in a synchronous motor is Zero Two Infinity One Zero Two Infinity One ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In order to to reverse the direction of a synchronous motor, _______ Interchange any two stator lines Reduce dc field excitation to zero None of the listed here Change supply frequency Interchange any two stator lines Reduce dc field excitation to zero None of the listed here Change supply frequency ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Power factor of a synchronous motor is unity when The armature current is minimum None of the listed here The armature current is zero The armature current is maximum The armature current is minimum None of the listed here The armature current is zero The armature current is maximum ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors For power factor correction, synchronous motors operate at 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 normal load with zero excitation no-load and greatly over-excited fields normal load with minimum excitation ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The rotor copper losses, in a synchronous motor, are met by c. source supply lines armature input motor input c. source supply lines armature input motor input ANSWER DOWNLOAD EXAMIANS APP
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