Synchronous Motors The efficiency of a properly designed synchronous motor will usually fall in range 60 to 70% 75 to 80% 85 to 95% 99 to 99.5% 60 to 70% 75 to 80% 85 to 95% 99 to 99.5% ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The power factor correction capability of a loaded synchronous motor _____ with the increases in mechanical load. None of the listed here Decreases Increases Remains unchanged None of the listed here Decreases Increases Remains unchanged ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When load on a synchronous motor is increased, its armature current is increased provided, it is ______ All of these Normally excited Under-excited Over-excited All of these Normally excited Under-excited Over-excited ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The pull out torque of a synchronous motor is generally ______ times its full-load torque. 1.25 to 3.5 6 to 9 0.5 5 to 10 1.25 to 3.5 6 to 9 0.5 5 to 10 ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The rotor copper losses, in a synchronous motor, are met by armature input motor input supply lines c. source armature input motor input supply lines c. source ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors While running, a synchronous motor is compelled to run at synchronous speed because of _______ Induced emf in rotor field winding by stator flux Compulsion due to lenz's law Damper winding in its pole faces Magnetic locking between stator and rotor poles Induced emf in rotor field winding by stator flux Compulsion due to lenz's law Damper winding in its pole faces Magnetic locking between stator and rotor poles ANSWER DOWNLOAD EXAMIANS APP
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