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Electrical Machines

Electrical Machines
In alternator, the rotary part is

 none of these.
 armature.
 core.
  magnetic field poles.

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Electrical Machines
In DC generator, armature reaction refers to what?

None of these
  Effect of armature flux on the main field flux.
 Effect of field flux on the armature flux.
 Effect of armature flux on the load.

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Electrical Machines
The brushes of a DC machine should be placed on the

 armature midway between poles.
 commutator in the polar axis.
 armature in the polar axis.
 commutator in the inter polar axis.

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Electrical Machines
A 20KVA auto transformer, turn ratio is 0.8. Find the power transferred conductively?

 20KVA
 0KVA
 4KVA
 16KVA

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Electrical Machines
The shaft of induction motor should be

  any of these.
  hollow.
  stiff.
  flexible.

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Electrical Machines
A single phase, 2 KV alternator has an armature resistance of 0.8 ohms and 4.94 ohms respectively. The voltage regulation of the alternator at 100 a load 0.8 loading power factor is

 0%.
  8.9%.
 14%.
 7%.

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MORE MCQ ON Electrical Machines

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