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Alternators

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

Positive
Negative
Unity
Zero

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Alternators
Turbo alternators are generally used to run at

1500 rpm
3000 rpm
1500 rpm
5000 rpm

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Alternators
Alternators are usually design to generate

Definite currents
Variable frequncies
Definite frequencies
Definite power factor

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Alternators
Hydrogen is used in large alternators mainly to

Reduce distortion of waveform
Cool the machine
Strengthen the magnetic field
Reduce eddy current losses

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Alternators
An alternator is somtimes called _______ generator.

Synchronous
Rosenberg
Asynchronous
None of the listed here

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Alternators
Three phase alternators are invariably star commected because

Less turns of wire are required
Magnetic losses are the minimum
Small conductors can be used
Higher terminal voltage is obtained

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