Synchronous Motors The duration of sudden short-circuit test on a synchronous motor is usually about one minute one hour None of these one second one minute one hour None of these one second ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The pull out torque of a practical synchronous motor will occur when the torque angle is about _____ 45° 75° 0° 30° 45° 75° 0° 30° 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 If a synchronous motor is operating at a supply frequency of 50 cycles/second, then, rotor revolves at ______ None of the listed here 25 cycles/ second 100 cycles/second 50 cycles/second None of the listed here 25 cycles/ second 100 cycles/second 50 cycles/second ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When load on an over-excited or under excited synchronous motor is increased, rate of change of its armature current as compared with that of power factor is equal more less twice equal more less twice ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Power factor of a synchronous motor is unity when None of the listed here The armature current is minimum The armature current is maximum The armature current is zero None of the listed here The armature current is minimum The armature current is maximum The armature current is zero ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS