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Alternators

Alternators
In aircrafts, alternators have operating frequency of

800 Hz
400 Hz
60 Hz
50 Hz

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Alternators
The disadvantaged of a short pitched coil is that _______

None of the listed here
Waveform becomes non-sinusoidal
Voltage round the coil is reduced
Harmonics are introduced

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Alternators
Turbo alternator are generally used to run at

15000 rpm
3000 rpm
5000 rpm
1500 rpm

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Alternators
The field winding of an alternator is _____ excited.

Both DC and AC
AC
None of the listed here
DC

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Alternators
The speed of a salient pole machine is nearly

1500 rpm
500 rpm
3000 rpm
1000 rpm

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Alternators
The stator of an alternator rarely uses _____slots.

Wide open type
Closed type
None of the listed here
Semi-closed type

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