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Synchronous Motors

Synchronous Motors
The ratio of starting torque to running torque in a synchronous motor is

One
Infinity
Zero
Two

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Synchronous Motors
The speed regulation of a synchronous motor is always

Zero
1%
Positive
0.5%

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Synchronous Motors
A synchronous motor can operate at

Lagging, leading and unity power factors
Lagging power factor only
Leading power factor
Unity power factor only

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Synchronous Motors
Most of the synchronous motors are _______ power factor metors.

Unity
0.5 leading
0.8 lagging
0.8 leading

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Synchronous Motors
A synchronous motor runs at speed ranging from ______

1800 to 3600 rpm
None of the listed here
150 to 1800 rpm
3600 to 6000 rpm

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

90°
120°
45°
60°

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