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Electrical Machines

Electrical Machines
Brushes are always placed on--------------- , in order to achieve sparkles commutation?

 MNA
 either GNA or MNA
 GNA
None of these

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Electrical Machines
Synchronising power of a synchronous motor varies

 inversely as 1/Xs
All of these
 directly as Xs2
 directly as synchronous reactances Xs

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Electrical Machines
At stand still condition the value of slip is

 0
 infinite value
 1
 finite value

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Electrical Machines
To increase starting torque of a 3-phase slip ring induction motor, preferred method is to increase

 supply voltage
 supply frequency
 rotor resistance
None of these

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Electrical Machines
What will be the maximum power factor of an induction motor for dispersion coefficient of 0.05?

 1.1.
 20.
  0.905.
  0.05.

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Electrical Machines
A 4-pole generator with 16 coil has a two layer lap winding. The pole pitch is

 32.
  4.
 16.
 8.

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MORE MCQ ON Electrical Machines

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