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Alternators

Alternators
In an alternator, for a coil having a span of 2/3 of pole pitch, the coil span factor will be

0.6
0.707
0.2
0.866

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Alternators
High speed alternators are driven by _____.

Hydraulic turbines
Steam turbines
None of the listed here
Diesel engines

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Alternators
The full load efficiency of an alternator _______with increases in speed.

Decreases
Increases
None of the listed here
Remains unchanged

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Alternators
Turbo alternator are generally used to run at

1500 rpm
15000 rpm
3000 rpm
5000 rpm

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Alternators
An alternator is somtimes called _______ generator.

Rosenberg
Asynchronous
Synchronous
None of the listed here

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Alternators
An alternator supplying power to a load with a leading power factor always has ______ voltage regulation.

Unity
Negative
Positive
Zero

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