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Synchronous Motors

Synchronous Motors
A synchronous capacitor is an over excited motor running at ________

No load
Half full load
Full load
None of the listed here

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Synchronous Motors
A synchronous motor can be used as a synchronous capacitor when it is

Over loaded
Under loaded
Under excited
Over excited

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Synchronous Motors
Mostly, synchronous motors are of

Smooth cylindrical type machines
Alternator type machines
Salient pole type machines
Induction type machines

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Synchronous Motors
When the field of a synchronous motor is under-excited, the power factor will be

leading
zero
unity
lagging

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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

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Synchronous Motors
In a synchronous motor which loss varies with load ?

Windage loss
Copper loss
Bearing friction loss
Core loss

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MORE MCQ ON Synchronous Motors

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