Synchronous Motors A synchronous motor develops maximum power when load angle is 60° 120° 45° 90° 60° 120° 45° 90° ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Synchronous motors are generally used in application requiring _______ Infrequent starting Sudden application of heavy loads Variable speed Frequent stopping Infrequent starting Sudden application of heavy loads Variable speed Frequent stopping ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The rotor copper losses, in a synchronous motor, are met by motor input armature input supply lines c. source motor input armature input supply lines c. source ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The maximum speed variation in a 3 phase synchronous motor is 10 percent Zero 2 percent 4 percent 10 percent Zero 2 percent 4 percent ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When load on a synchronous motor is increased, its armature current is increased provided, it is ______ Normally excited Under-excited All of these Over-excited Normally excited Under-excited All of these Over-excited ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When the field of a synchronous motor is under-excited, the power factor will be leading zero lagging unity leading zero lagging unity ANSWER DOWNLOAD EXAMIANS APP