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Electrical Machines

Electrical Machines
Oil is provided in an oil filled transformer for

 lubrication.
  both cooling and insulation.
  insulating.
 cooling.

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Electrical Machines
What is the full form of MNP?

  Magnetic field neutral plane.
  Magnetic neutral plane.
  Magnetic neutral pole.
  Magnetic field neutral pole.

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Electrical Machines
To eliminate the 5th harmonic in the induced voltages their respective pitch factor angle should be

 72°
 30°
 36°
 18°

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Electrical Machines
The field divertor resistance for a DC series motor is of order of

 50 Ω
 0.1 Ω
 100 Ω
 10 Ω

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Electrical Machines
Which of the following motor is suitable for frequent starting and stoppings?

 Capacitor start motor
All of these
 Capacitor start capacitor run motor
 Resistance split phase motor

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Electrical Machines
What is the phase difference between two windings of A.C servomotor ?

 90°.
 120°.
 30°.
 60°.

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MORE MCQ ON Electrical Machines

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