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Electrical Machines
The shaft of induction motor may be unbalanced due to
overload.
uneven air gap.
poor lubrication.
overheating of winding.
overload.
uneven air gap.
poor lubrication.
overheating of winding.
Answer
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Related Question
Electrical Machines
Conservator tank is used
to take up the expansion of oil due to temperature rise.
None of these
to act as an oil storage.
for better cooling of transformer.
to take up the expansion of oil due to temperature rise.
None of these
to act as an oil storage.
for better cooling of transformer.
Answer
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Electrical Machines
The flux is maximum in the following part of a DC motor:
pole core.
under trailing pole tip.
under leading pole tip.
under the interpole.
pole core.
under trailing pole tip.
under leading pole tip.
under the interpole.
Answer
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Electrical Machines
In case of a conductively compensated DC series motor, the compensating winding is provided
In parallel with the armature winding.
As a separate unit.
In parallel with the field winding.
In series with the armature winding.
In parallel with the armature winding.
As a separate unit.
In parallel with the field winding.
In series with the armature winding.
Answer
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Electrical Machines
The direction of rotation of conductor of a DC motor can be determined by
Fleming's right hand rule.
Ampere law.
Fleming's left hand rule.
Lenz's law.
Fleming's right hand rule.
Ampere law.
Fleming's left hand rule.
Lenz's law.
Answer
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Electrical Machines
Armature resistance control method is used for the _______ ?
below rated speed
above rated speed
both 1 and 2
None of these
below rated speed
above rated speed
both 1 and 2
None of these
Answer
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