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Electrical Machines

Electrical Machines
The heat generated in the transformer is dissipated mainly by

 radiation.
All of these
  convection.
 conduction.

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Electrical Machines
The ventilating ducts in most of DC machine are

 radial as well as longitudinal.
 longitudinal.
 radial.
 none of these.

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Electrical Machines
With the increases in field excitation of a DC generator, its generated emf

  decreases.
  remains constant.
 increases.
  increases upto a limit and then remains almost constant.

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Electrical Machines
In shaded pole induction motors, the flux moves from ------------- region to ----------------- region respectively?

 unshaded, shaded
 unshaded, unshaded
 shaded, shaded
 shaded, unshaded

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Electrical Machines
Which slots are used in the rotor of an induction motor?

  Semi closed slots.
  Closed slots.
  Open slots.
  None of above.

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Electrical Machines
Which of the following is/are not a self starting motor?

 3-phase induction motor
None of these
 both 1 and 2
 1-phase induction motor

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MORE MCQ ON Electrical Machines

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