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Alternators

Alternators
The field winding of an alternator is _____ excited.

AC
None of the listed here
Both DC and AC
DC

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

Remians unchanged
None of the listed here
Increases
Decreases

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Alternators
The voltage regulation of an alternator depends on

Load current only
Both load current and pf
None of the listed here
Power factor only

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Alternators
A lower voltage alternator, for the same power rating, will be

Operating at high rpm
More costly
Larger in size
More efficient

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Alternators
In an alternator, armature reaction is considered equivalent to

Fictitious impedance
Fictitious reactance
Fictitious conductance
Fictitious resistance

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Alternators
Regulation of alternator supplying reaistive or inductive load is

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

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