Synchronous Motors When the field of a synchronous motor is under-excited, the power factor will be unity zero lagging leading unity zero lagging leading ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When a synchronous motor is pulled out of synchronism, the stator current ________ Become zero Remains unchanged Is decreased too much Is increased too much Become zero Remains unchanged Is decreased too much Is increased too much ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The construction of a synchronous motor resembles an induction motor a series motor an alternator a rotary converter an induction motor a series motor an alternator a rotary converter ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors An important advantage of a synchronous motor over wound round induction motor is that its speed is independent of supply frequency its power factor may be varied at will its speed may be controlled more easily None of these its speed is independent of supply frequency its power factor may be varied at will its speed may be controlled more easily None of these ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In order to to reverse the direction of a synchronous motor, _______ 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 Interchange any two stator lines Reduce dc field excitation to zero ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Dust and dirt accumulation on motor winding will result in Increased core losses Eddy current flow Shorting of coils Rise in winding temperature Increased core losses Eddy current flow Shorting of coils Rise in winding temperature ANSWER DOWNLOAD EXAMIANS APP
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