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Synchronous Motors

Synchronous Motors
A synchronous motor can be started by

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

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

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

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Synchronous Motors
An important advantage of a synchronous motor over wound round induction motor is that

its power factor may be varied at will
its speed may be controlled more easily
its speed is independent of supply frequency
None of these

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Synchronous Motors
An over excited synchronous motor behaves as _____

A capacitor
A resistor
None of the listed here
An inductor

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Synchronous Motors
A synchronous motor is a ______ motor.

Variable pf
Variable speed
None of the listed here
Singly fed

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Synchronous Motors
A synchronous motor runs at speed ranging from ______

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

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