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Synchronous Motors

Synchronous Motors
When the synchronous motor runs at synchronous speed, the voltage induced in the damper winding is _____

Zero
minimum
Maximum
None of the listed here

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Synchronous Motors
Synchronous motors are generally used in application requiring _______

Infrequent starting
Sudden application of heavy loads
Variable speed
Frequent stopping

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Synchronous Motors
For the same active power consumed, the stator current of a synchronous motor is ______ that of a 3 phase induction motor.

None of the listed here
The same as
More than
Less than

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Synchronous Motors
Which of the following motors is non self starting?

Wound rotor induction motor
Squirrel cage induction motor
Dc series motor
Synchronous motor

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Synchronous Motors
The speed of a synchronous motor

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

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Synchronous Motors
The speed regulation of a synchronous motor is always

Zero
Positive
0.5%
1%

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