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Alternators

Alternators
Turbo alternators are generally used to run at

5000 rpm
1500 rpm
1500 rpm
3000 rpm

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Alternators
Zero power factor method for alternator is generally used to determine

Efficiency of alternator
Synchronous impedance of alternator
Voltage regulation of the alternator
None of the listed here

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Alternators
In huge alternators, the moving part is

Brushes
None of the listed here
Poles
Armature

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Alternators
In an alternator, the effect of armature reaction is minimum at power factor of ______

0.866 lagging
0.5 lagging
Unity
0.866 leading

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Alternators
Excessive windage loss and noise occur with

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

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Alternators
Voltage regulation of an alternator is larger than that of a dc generator because of _______

Complex effects of armature reaction
None of the listed here
Large leakage reactance
Large armature resistance

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MORE MCQ ON Alternators

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