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Electrical Machines

Electrical Machines
In single phase rotary converter the number of slip rings will be

 six.
 two.
 four.
 three.

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Electrical Machines
Fufuraldehyde analysis is done to determine the

  condition of paper insulation in transformer.
 condition of cork gaskets used in transformer.
 condition of lamination on CRGO steel sheet.
 condition of oil in transformer.

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Electrical Machines
In double cage induction motor, the inner cage offers

  low resistance and low reactance.
  high resistance and high reactance.
  low resistance and high reactance.
  high resistance and low reactance.

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Electrical Machines
The output power of a dc motor is given by

  EbIa.
  EbIa2.
  none of these.
  EIa.

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Electrical Machines
A 3-phase, 50 Hz, 4 pole induction motor is running at 1440 rpm. Find the rotor efficiency?

 94%
 96%
 95%
 92%

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Electrical Machines
The shaft of induction motor should be

  stiff.
  hollow.
  any of these.
  flexible.

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MORE MCQ ON Electrical Machines

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