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Electrical Machines

Electrical Machines
The 3 - Φ induction motor with rotor circuit open will

  make noise.
  not run.
  get over heated.
  run normally.

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Electrical Machines
Which of the following starter is sufficient to start the DC series motor ?

All of these
 4 point starter
 2 point starter
 3 point starter

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Electrical Machines
If an additional resistance is connected in series with a DC motor operating at rated speed, the speed of the motor will

  Reduce.
  Remain unaltered.
  Oscillate around the normal speed.
  Increase.

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Electrical Machines
The rotor power output of 3-phase induction motor is 15 KW. The rotor copper losses at a slip of 4% will be

 625 W
 600 W
 650 W
 700 W

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Electrical Machines
The full load copper loss and iron loss of transformer are 6400W and 5000W respectively. The copper loss and iron loss at half load will be respectively?

 3200 W and 2500 W
 1600 W and 1250 W
 3200 W and 5200 W
 1600 W and 5000 W

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Electrical Machines
In a 12 pole triplex lap wound DC armature, each conductor can carry current of 100 A. The rated current of this armature is

 600 A.
 1200 A.
  3600 A.
 2400 A.

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MORE MCQ ON Electrical Machines

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