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Synchronous Motors

Synchronous Motors
The maximum speed variation in a 3 phase synchronous motor is

4 percent
2 percent
10 percent
Zero

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Synchronous Motors
For power factor correction, synchronous motors operate at

normal load with zero excitation
no-load and greatly over-excited fields
normal load with minimum excitation
no-load and under-excited fields

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Synchronous Motors
A synchronous motor can be started by

Pony motor
Dc compound motor
Provinding damper winding
All of the listed here

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Synchronous Motors
An over excited synchronous motor is used for

Power factor corrections
Variable speed loads
Low torque loads
Fluctuating loads

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Synchronous Motors
Synchronous motors are generally used in application requiring _______

Frequent stopping
Sudden application of heavy loads
Infrequent starting
Variable speed

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

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

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MORE MCQ ON Synchronous Motors

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