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Electrical Machines

Electrical Machines
In a lap winding dc machine number of conductors are 100 and number of parallel paths are 10. Find the average pitch

 1
 50
 10
 100

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Electrical Machines
Which of the following bearings and their uses are correct

 neither 1 nor 2
 ball bearings → small machines
 roller bearings → large machines
 both A and B

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Electrical Machines
At slip s = 1 torque developed in machine is

  maximum torque.
  electromagnetic torque.
  none.
  starting torque.

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Electrical Machines
Pole changing methods are suitable only for ___________ type induction motor.

  wound.
  none of these.
  linear.
  cage.

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Electrical Machines
For the purpose of starting an induction motor, star/delta switch is an equivalent to auto transformer of ratio

 57.7%
 66.3%
 50%
 33.3%

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Electrical Machines
In DC shunt motor if load is increased, the speed

 increased slightly.
 remains constant.
 reduce slightly.
 increase proportional.

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MORE MCQ ON Electrical Machines

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