Synchronous Motors An important advantage of a synchronous motor over wound round induction motor is that its speed is independent of supply frequency None of these its speed may be controlled more easily its power factor may be varied at will its speed is independent of supply frequency None of these its speed may be controlled more easily its power factor may be varied at will ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The minimum armature current of the synchronous motor corresponds to operation at unity power factor 0.707 power factor lagging zero power factor leading 0.707 power factor leading unity power factor 0.707 power factor lagging zero power factor leading 0.707 power factor leading ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When the synchronous motor is pulled out of synchronism, the stator current _______ Becomes zero Is increased too much Is decreased too much Remains unchanged Becomes zero Is increased too much Is decreased too much Remains unchanged ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor is cheaper than 3-phase induction motor for _____ None of the listed here High speed, low output Low speed, high output High speed, high output None of the listed here High speed, low output Low speed, high output High speed, high output ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor will always stop when Excitation winding gets disconnected Load in motor varies Supply voltage frequency changes Supply voltage fluctuates Excitation winding gets disconnected Load in motor varies Supply voltage frequency changes Supply voltage fluctuates ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Small synchronous motors are started by _______ None of the listed here Variable frequency source Pony motor Damper winding None of the listed here Variable frequency source Pony motor Damper winding ANSWER DOWNLOAD EXAMIANS APP
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