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Electrical Machines

Electrical Machines
Eb/V ratio of a DC motor is an indication of

  Effiency.
 Running Torque.
 Speed regulation.
 Starting torque.

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Electrical Machines
Equalizer rings are used in which of the followings?

 wave winding
None of these
 lap winding
 both 1 and 2

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Electrical Machines
The armature shaft must be able to with stand

All of these
 Any unbalanced magnetic pull on the armature core.
 Twisting stains due to transmission of torque.
 Bending moment due to weight of the armature.

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Electrical Machines
Oil is provided in an oil filled transformer for

  both cooling and insulation.
 lubrication.
 cooling.
  insulating.

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Electrical Machines
In case of IM the torque is

  directly proportional to slip.
  inversely proportional to slip.
  inversely proportional to √slip.
  directly proportional to slip2.

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Electrical Machines
Which of the following is the largest conversion device?

All of these
 DC machine
 Induction machine
 Synchronous machine

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MORE MCQ ON Electrical Machines

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