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SYNCHRONOUS MOTORS

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

2 percent
4 percent
10 percent
Zero

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Synchronous Motors
The speed of a synchronous motor

Increases as the load increases
Always remains constant
None of the listed here
Decreases as the load decreases

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Synchronous Motors
If one phase of a 3 phase synchronous motor is short circuited, motor

Will overheat in spots
Will fail to pull into step
Will not come upto speed
Will refused ro start

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Synchronous Motors
The armature current of the synchronous motor has higher values for

None of the listed here
Low excitation only
Both higher and low excitation
Higher excitation only

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Synchronous Motors
Slip rings in a synchronous motor carry

No current
All of the listed here
Alternating current
Direct current

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