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Alternators

Alternators
A 3 phase alternator has 3-slot per pole. The distribution factor of the winding is _______

0.5
1
None of the listed here
0.866

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Alternators
Voltage regulation of an alternator is usually

None of the listed here
Much higher than that of a power transformer
Equal to that of power transformer
Much lower than that of power transformer

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Alternators
Regulation of alternator supplying reaistive or inductive load is

Always negative
Always positive
None of the listed here
Either positive or negative

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Alternators
Excessive windage loss and noise occur with

Cylindrical rotors
Salient pole rotors
Either cylindrical or salient
None of the listed here

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Alternators
An alternator is somtimes called _______ generator.

Synchronous
None of the listed here
Asynchronous
Rosenberg

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Alternators
If the number of poles of an alternator is increased, the generated emf

Increases
Remains the same
None of the listed here
Decreases

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