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Alternators
Alternators
In an alternator, the stator frame serves
To protect the whole machine
To verticate the armature
To hold the armature stampings
As a return path for the flux
To protect the whole machine
To verticate the armature
To hold the armature stampings
As a return path for the flux
Answer
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Alternators
Voltage regulation of an alternator is usually
Equal to that of power transformer
Much lower than that of power transformer
Much higher than that of a power transformer
None of the listed here
Equal to that of power transformer
Much lower than that of power transformer
Much higher than that of a power transformer
None of the listed here
Answer
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Alternators
Alternators, now a days, are designed to have poor regulation because
We employ automatic voltage regulators
None of the listed here
It limits the value of short circuit current
It reduces the construction cost
We employ automatic voltage regulators
None of the listed here
It limits the value of short circuit current
It reduces the construction cost
Answer
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Alternators
In air-crafts, alternators have operating frequency of
500 Hz
400 Hz
60 Hz
50 Hz
500 Hz
400 Hz
60 Hz
50 Hz
Answer
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Alternators
In an alternator the armature reaction is mainly influenced by
Total current drawn
Speed of the alternator
Short circuit ratio
The power factor of the load
Total current drawn
Speed of the alternator
Short circuit ratio
The power factor of the load
Answer
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