Synchronous Motors In a synchronous motor, the forced vibrations will be maximum when driving A centrifugal blower A reciprocating air compressor A centrifugal pump Any of the listed here A centrifugal blower A reciprocating air compressor A centrifugal pump Any of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The operating speed of a synchronous motor can be changed to new fixed value by changing the supply voltage changing frequency using brakes changing the load changing the supply voltage changing frequency using brakes changing the load ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The minimum armature current of the synchronous motor corresponds to operation at unity power factor zero power factor leading 0.707 power factor leading 0.707 power factor lagging unity power factor zero power factor leading 0.707 power factor leading 0.707 power factor lagging ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors If the field circuit of an unloaded salientpole synchronous motor gets suddenly open-circuited, then it runs at a very high speed it runs at a slower speed the motor stops it continues to run at the same speed it runs at a very high speed it runs at a slower speed the motor stops it continues to run at the same speed ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor connected to infinite bus-bars has at constant full load, 100% excitation and unity power factor. On changing the excitation only, the armature current will have leading power factor with under-excitation lagging power factor with over-excitation no change of power factor leading power factor with over-excitation leading power factor with under-excitation lagging power factor with over-excitation no change of power factor leading power factor with over-excitation ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The construction of a synchronous motor ressembles A series motor A rotary converter An alternator An induction motor A series motor A rotary converter An alternator An induction motor ANSWER DOWNLOAD EXAMIANS APP
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