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Alternators

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

Seventh
Fifth
Third
Ninth

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Alternators
Voltage drop in an alternator when under load is due to ______

All of the listed here
Armature reactance
Armatute reaction
Armature resistance

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Alternators
Turbo alternators have rotors of _______

Small diameter and long axial length
Large diameter and long axial length
Same diameter and axial length
Large diameter and small axial length

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Alternators
When load on an alternator is increased, the terminal voltage increases if the load pf is ______

Zero
Unity
Lagging
Leading

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Alternators
The efficiency of the turbo-alternator _____ with increases in speed.

Remians unchanged
None of the listed here
Increases
Decreases

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Alternators
In an alternator, armature reaction is considered equivalent to

Fictitious resistance
Fictitious reactance
Fictitious impedance
Fictitious conductance

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