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Electrical Machines

Electrical Machines
In salient pole synchronous machine, the reluctance power varies as

 cosδ
 sinδ
 sin2δ
 cos2δ

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Electrical Machines
Series booster is a

 separately excited DC generator.
 permanent magnet DC generator.
 shunt wound DC generator.
  series wound DC generator.

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Electrical Machines
In dc machines, the field-flux axis and armature-mmf axis are respectively along

 direct axis and indirect axis
 quadrature axis and direct axis
 quadrature axis and interpolar axis
 direct axis and interpolar axis

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Electrical Machines
For same HP rating and full load speed which of following motor has poor starting torque?

 Differently compounded.
 Cummulative compound.
 Shunt.
 Series.

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Electrical Machines
The speed of a 50 Hz three phase induction motor under full load condition is 725 rpm the number of poles of the motor are ______________.

 6.
  8.
 4.
  2.

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

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

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MORE MCQ ON Electrical Machines

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