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Electrical Machines

Electrical Machines
When maximum starting torque is obtained, rotor power is

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Electrical Machines
Fufuraldehyde analysis is done to determine the

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

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Electrical Machines
On which of the following factor/factors the speed of a DC motor depends upon?

 Applied voltage.
 Field flux.
 Armature current.
 All of these.

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Electrical Machines
When the rotor of a 3 phase induction motor is blocked then the slip is

  0.54.
 0.7.
  1.
 0.3.

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Electrical Machines
Satisfactory commutation of DC machine requires

 smooth, concentric commutator properly undercut.
All of these
 brushes should be of proper grade and size.
 brushes should smoothly run in the holders.

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Electrical Machines
What is the full form of MNP?

  Magnetic field neutral pole.
  Magnetic neutral plane.
  Magnetic neutral pole.
  Magnetic field neutral plane.

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MORE MCQ ON Electrical Machines

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