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Electrical Machines

Electrical Machines
Example of double excited machine is

 Both are correct.
 Synchronous motor.
 DC Shunt Motor
None of these

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Electrical Machines
In a 3 - Φ IM in order to eliminate cogging the number of stator slots must be

  an integral multiple of number of rotor slots.
  equal to number of rotor slots.
  unequal to number of rotor slots and skewed in shape.
  either (B) or (C).

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Electrical Machines
No load test of 3-phase induction motor gives which of the following?

 variable loss
None of these
 both A and B
 constant loss

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Electrical Machines
In one 132 / 33 kV transformer the LV resistance is 0.02 per unit. The resistance referred to HV side is

  0.02 pu.
 0.01 pu.
  0.08 pu.
 0.16 pu.

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Electrical Machines
Which of the following relation is correct?

 Xd = Xq.
 Xd < Xq.
None of these
 Xd > Xq.

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Electrical Machines
Capacitor in split phase induction motor is used to

 improve the starting torque.
 start the motor.
 improve the power factor.
 reduce the harmonics.

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