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Alternators

Alternators
A 3 phase alternator has 3-slot per pole. The distribution factor of the winding is _______

0.5
None of the listed here
1
0.866

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Alternators
Low speed alternators are driven by ______

Steam turbines
Hydraulic turbines
Steam engine
None of the listed here

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Alternators
Excessive windage loss and noise occur with

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

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Alternators
In a large generator, dampers

None of the listed here
Reduce voltage fluctuations
Increase stability
Reduce frequency fluctuations

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Alternators
In an alternator the armature reaction is mainly influenced by

Total current drawn
Short circuit ratio
Speed of the alternator
The power factor of the load

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

8
12
2
4

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