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Synchronous Motors

Synchronous Motors
A synchronous motor develops maximum power when load angle is

60°
45°
90°
120°

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Synchronous Motors
The rotor of a synchronous motor is

None of the listed here
Salient pole type
Identical to that of a dc motor
Nonsalient pole type

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Synchronous Motors
When a synchronous motor is pulled out of synchronism, the stator current ________

Is increased too much
Is decreased too much
Become zero
Remains unchanged

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Synchronous Motors
The angle between the rotor poles and stator poles, in a synchronous motor, is known as

Torque angle
Angle of retardation
Power factor angle
Synchronising angle

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Synchronous Motors
The rotor copper losses, in a synchronous motor, are met by

supply lines
c. source
armature input
motor input

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

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

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MORE MCQ ON Synchronous Motors

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