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Synchronous Motors

Synchronous Motors
A synchronous motor can be started by

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

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Synchronous Motors
For reciprocating compressor, the synchronous motor is designed to have pull in torque of about ______ times the full load torque.

5
0.5
6
2

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Synchronous Motors
Hunting in a synchronous motor can not be due to

Windage friction
Variable supply frequency
Variable load
Variable frequency

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Synchronous Motors
The speed regulation of a synchronous motor is always

Positive
0.5%
Zero
1%

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Synchronous Motors
The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as

pull-out torque
pull-up torque
None of these
pull-in torque

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Synchronous Motors
The pull out torque of a practical synchronous motor will occur when the torque angle is about _____

75°
0°
30°
45°

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MORE MCQ ON Synchronous Motors

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