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Alternators

Alternators
Copper losses of an alternator can be measured by

Rectifier
Transformer
Dc motor
None of the listed here

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Alternators
When load on an alternator is increased, the terminal voltage increases if the load pf is ______

Zero
Lagging
Unity
Leading

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Alternators
Modern 3-phase alternator of a central power station will have generated voltage of

230 V
400 V
11 kV
132 kV

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Alternators
Excessive windage loss and noise occur with

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

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Alternators
The number of cycles generated in a 6-pole alternators in one revolution is _______

3
50
6
None of the listed here

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Alternators
Alternators are usually design to generate

Definite power factor
Definite frequencies
Definite currents
Variable frequncies

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