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Electrical Machines

Electrical Machines
which of the following losses are negligible in blocked rotor test?

 mechanical loss
 iron loss
 copper loss
 both A and B

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Electrical Machines
A 3 - Φ slip ring motor has

  double cage rotor.
  any of the above.
  wound rotor.
  short-circuited rotor.

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Electrical Machines
Direction of the current in the compensating winding is________ to the direction of current in the armature conductors?

 either of these
 exactly opposite
 same
None of these

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Electrical Machines
Normally for the design of transformer the ambient temperature is taken as

 35°C.
 32°C.
 27°C.
  45°C.

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Electrical Machines
In circle diagram for induction motor, diameter of circle represents which of the following ?

 Line voltage.
 Running torque.
 Rotor current.
 Slip.

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Electrical Machines
The armature MMF waveform of a DC machine is

  rectangular.
  triangular.
  pulsating.
  sinusoidal.

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MORE MCQ ON Electrical Machines

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