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Alternators

Alternators
The speed of a salient pole machine is nearly

500 rpm
1500 rpm
3000 rpm
1000 rpm

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Alternators
An alternator coupled to which primemover will usually have the highest rotating speed?

Steam engine
Reciprocating diesel engine
Francis turbine
Steam turbine

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Alternators
The rotor of a turbo alternator is made cylindrical in order to reduce_______

Eddy current loss
Windage loss
Hysteresis loss
None of the listed here

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Alternators
The power factor of an alternator is determined by its

Load
Speed
Primemover
Excitation

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Alternators
The frequency of emf generated in an 8-pole alternator running at 900 rpm is ______

60 Hz
None of the listed here
50 Hz
120 Hz

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

Armature resistance
Armature reactance
All of the listed here
Armatute reaction

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