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Synchronous Motors

Synchronous Motors
The percentage slip in case of a synchronous motor is

0.005
0.01
1
zero

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Synchronous Motors
A synchronous motor can be made self starting by providing

Damper winding on rotor poles
Damper winding on stator as well as rotor poles
Damper winding on stator
None of the listed here

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Synchronous Motors
In a 3-phase synchronous motor, the negative phase sequence exists when the motor is

None of these
under-loaded
supplied with unbalanced voltage
over-loaded

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Synchronous Motors
In a synchronous motor, the forced vibrations will be maximum when driving

A centrifugal pump
A reciprocating air compressor
A centrifugal blower
Any of the listed here

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Synchronous Motors
In a synchronous motor, the maximum power developed depends on all of the following except

maximum value of coupling angle
direction of rotation
rotor excitation
supply voltage

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Synchronous Motors
A synchronous motor can develop synchronous torque

when under loaded
only at synchronous speed
below or above synchronous speed
while over-excited

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MORE MCQ ON Synchronous Motors

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