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Synchronous Motors

Synchronous Motors
The percentage slip in case of a synchronous motor is

0.005
0.01
1
zero

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Synchronous Motors
The operating speed of a synchronous motor can be changed to new fixed value by

changing the load
using brakes
changing the supply voltage
changing frequency

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Synchronous Motors
A synchronous motor delivers reactive power when ______

Normally excited
None of the listed here
Under excited
Over excited

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

0.5 leading
0.8 leading
0.8 lagging
Unity

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Synchronous Motors
The construction of a synchronous motor ressembles

A series motor
An alternator
An induction motor
A rotary converter

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Synchronous Motors
A synchronous motor is cheaper than 3-phase induction motor for _____

High speed, high output
None of the listed here
Low speed, high output
High speed, low output

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