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Electrical Machines

Electrical Machines
If direct axis reactance Xd and quadrature axis reactance Xq are equal, then reluctance power is

 zero
 minimum
All of these
 maximum

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Electrical Machines
In DC machine, the armature windings are placed on the rotor because of necessity for

 commutation.
 electromechanical energy conversion.
 development of torque.
 generation of voltage.

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Electrical Machines
What is the function of inter pole in DC generator?

 To get a superior commutation.
  Both option B and C.
 To serve the economical aspects.
 To neutralize the distortion of main field flux due to armature reaction.

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Electrical Machines
Induction motor operation depends on

 either of these.
None of these
 stationary magnetic field.
 rotating magnetic field.

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Electrical Machines
Which of the following represents the operating region of slip in a 1-phase induction motor?

 0 < S < 1
 0 < S < 2
 -1 < S < 1
 -2 < S < 2

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Electrical Machines
What are slot wedges in a DC machine made of?

 Cast iron.
 Fibre.
 Mild steel.
 Silicon steel.

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MORE MCQ ON Electrical Machines

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