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Alternators

Alternators
In air-crafts, alternators have operating frequency of

60 Hz
50 Hz
500 Hz
400 Hz

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Alternators
Voltage regulation of an alternator is usually

Equal to that of power transformer
None of the listed here
Much higher than that of a power transformer
Much lower than that of power transformer

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Alternators
For producing an emf of given frequency, an alternator will run at greatest speed for _____ poles.

8
4
12
2

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Alternators
Copper losses of an alternator can be measured by

None of the listed here
Dc motor
Transformer
Rectifier

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Alternators
The synchronous reactance of an alternator is due to ______

Leakage flux
Armature reaction
Dc field excitation
None of the listed here

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

0.707
0.866
0.2
0.6

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MORE MCQ ON Alternators

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