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Alternators

Alternators
A two pole alternator is running at 1500 rpm. Its angular velocity is ______

118 rad/s
212 rad/s
192 rad/s
157 rad/s

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Alternators
Which harmonic will be totally eliminate in an alternator by using a fractional pitch of 4/5 ?

Fifth
Ninth
Seventh
Third

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Alternators
In an alternator the armature reaction is mainly influenced by

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

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Alternators
The number of poles in turbo alternators is usually

2
50
12
4

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Alternators
If the lagging load pf of an alternator is decreased, the demagnetising effect of armature reaction _______

Remains the same
Is increased
Is decreased
None of the listed here

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Alternators
Turbo alternators are generally used to run at

1500 rpm
5000 rpm
3000 rpm
1500 rpm

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