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Alternators

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

0.6
0.2
0.707
0.866

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Alternators
Excessive windage loss and noise occur with

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

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Alternators
In air-crafts, alternators have operating frequency of

50 Hz
400 Hz
500 Hz
60 Hz

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Alternators
In case of turbo-alternators the rotor is usually made of

Manganese steel
Laminated stainless steel
Forged steel
Cast iron

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Alternators
The rating of an alternator is expressed in______

kVAR
kW
HP
kVA

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Alternators
The number of cycles generated in a 6-pole alternators in one revolution is _______

6
3
50
None of the listed here

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MORE MCQ ON Alternators

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