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Synchronous Motors

Synchronous Motors
The duration of sudden short-circuit test on a synchronous motor is usually about

None of these
one second
one hour
one minute

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

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

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Synchronous Motors
If one phase of a 3 phase synchronous motor is short circuited, motor

Will not come upto speed
Will refused ro start
Will overheat in spots
Will fail to pull into step

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Synchronous Motors
When a unity pf synchronous motor is operated at a leading pf, it results in _______

More than rated horseppwer output
Less than rated horsepower output
None of the listed here
More than rated rotor current

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Synchronous Motors
The duration of sudden short circuit test on synchronous motor is usually about

One second
One minute
One hour
None of the listed here

ANSWER DOWNLOAD EXAMIANS APP
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