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Electrical Machines

Electrical Machines
When a transformer is loaded, the secondary terminal voltage drops. That means power factor is

 zero.
 leading.
  lagging.
 unity.

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Electrical Machines
Skewing of cage rotors offers the following advantages

  uniform torque.
  all of below.
  less noise.
  locking tendency is reduced.

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Electrical Machines
An induction motor has synchronous speed of 1500 rpm. What will be the slip when it is running at a speed of 1450 rpm?

 -3%
 +3%
 -3.33%
 +3.33%

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Electrical Machines
Which of the following induction motor has maximum speed?

 8 pole.
  2 pole.
 4 pole.
 6 pole.

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Electrical Machines
Which of the following windings are necessary in case of all dc machines?

 open type winding
 wave winding
 closed winding
 lap winding

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Electrical Machines
A three phase induction motor has a synchronous speed of 1500 rpm the machine runs at 1460 rpm at a particular load. The slip at this load is ___________.

  30 %.
 5 %.
 1.5 %.
  2.67 %.

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MORE MCQ ON Electrical Machines

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