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Electrical Machines

Electrical Machines
DC shunt motors are suitable for

 Blowers and fans.
 Centrifugal pumps
 Lathes.
  All of this.

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Electrical Machines
Under operating conditions the rotor conductor should be _________________ in induction motor.

  always opened.
  semi closed or semi opened.
  always closed.
  none.

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Electrical Machines
Maximum allowable acidity level of power transformer insulating oil is generally taken as

  1 mg of KOH / gm.
 2 mg of KOH / gm.
 0.5 mg of KOH / gm.
  0.3 mg of KOH / gm.

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Electrical Machines
In a dc machine 4 pole lap winding is used. The number of parallel paths are?

 4
 8
 1
 2

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Electrical Machines
In a synchronous machine, if the field flux axis is ahead of the armature field axis in the direction of rotation, the machine operating is

  asynchronous motor.
  synchronous generator.
  synchronous motor.
  asynchronous generator.

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Electrical Machines
For the above problem, find the induced voltage of an alternator of it is to deliver a load of 100 A at power factor of 0.8 lagging with terminal voltage of 200 V.

 225 V.
  222 V.
 230 V.
 220 V.

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MORE MCQ ON Electrical Machines

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