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Alternators

Alternators
Copper losses of an alternator can be measured by

Dc motor
Transformer
None of the listed here
Rectifier

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Alternators
Iron and friction losses of an alternator can be measured by a

None of the listed here
Transformer
Dc motor
Rectifier

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Alternators
When two alternators are running in exact synchronism, the synchronising power will be

Sum of the output of two
Zero
Unity
None of the listed here

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

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

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Alternators
In aircrafts, alternators have operating frequency of

800 Hz
60 Hz
400 Hz
50 Hz

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Alternators
In an alternator, the stator frame serves

To hold the armature stampings
As a return path for the flux
To protect the whole machine
To verticate the armature

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