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Alternators

Alternators
In case of a uniformly distributed winding, the value of distribution factor is

0.76
0.995
0.85
0.65

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Alternators
Damper windings are used in alternators to

Reduce windage loss
Achieve synchronism
Prevenent hunting
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

0.2
0.866
0.707
0.6

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Alternators
Armature winding of an alternator are generally

Open winding
Closed winding
Partly open and partly closed windings
None of the listed here

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Alternators
Hydrogen is used in large alternators mainly to

Strengthen the magnetic field
Reduce eddy current losses
Reduce distortion of waveform
Cool the machine

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Alternators
The stator of an alternator is identical to that of a ______

Dc generator
Roserberg generator
3-phase induction motor
1-phase induction motor

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