Synchronous Motors In order to to reverse the direction of a synchronous motor, _______ Change supply frequency Interchange any two stator lines None of the listed here Reduce dc field excitation to zero Change supply frequency Interchange any two stator lines None of the listed here Reduce dc field excitation to zero ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The induced e.m.f. in a synchronous motor working on leading power factor will be more than the supply voltage less than the supply voltage None of these equal to the supply voltage more than the supply voltage less than the supply voltage None of these equal to the supply voltage ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The armature current of the synchronous motor has higher values for Low excitation only Both higher and low excitation Higher excitation only None of the listed here Low excitation only Both higher and low excitation Higher excitation only None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors As the load is applied to a synchronous motor, the motor takes more armature current because The rotor strengthens the rotating field causing more motor current The increased load has to take more current The rotor by shifting its phase backward causes motor to take more current The back e.m.f. decreases causing an increase in motor current The rotor strengthens the rotating field causing more motor current The increased load has to take more current The rotor by shifting its phase backward causes motor to take more current The back e.m.f. decreases causing an increase in motor current ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Synchronous motors are generally used in application requiring _______ Frequent stopping Variable speed Infrequent starting Sudden application of heavy loads Frequent stopping Variable speed Infrequent starting Sudden application of heavy loads ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor can be started by Pony motor All of the listed here Dc compound motor Provinding damper winding Pony motor All of the listed here Dc compound motor Provinding damper winding ANSWER DOWNLOAD EXAMIANS APP
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