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Alternators

Alternators
Turbo alternator are generally used to run at

1500 rpm
15000 rpm
5000 rpm
3000 rpm

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Alternators
The power factor of an alternator is determined by its

Excitation
Primemover
Speed
Load

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Alternators
An alternator coupled to which primemover will usually have the highest rotating speed?

Reciprocating diesel engine
Francis turbine
Steam turbine
Steam engine

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Alternators
The efficiency of the turbo-alternator _____ with increases in speed.

None of the listed here
Decreases
Remians unchanged
Increases

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Alternators
Iron and friction losses of an alternator can be measured by a

Dc motor
Rectifier
Transformer
None of the listed here

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Alternators
The non salient field construction is used for _______ alternator.

Medium speed
High speed
None of the listed here
Low speed

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