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Electrical Machines

Electrical Machines
Which of the following will vary the maximum torque?

 rotor resistance R
None of these
 both 1 and 2
 rotor reactance X

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Electrical Machines
A generator may loose residual magnetism due to

  over excitation.
  heating.
  vibrations.
  any of these.

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Electrical Machines
Which of following DC motors will have percentage increase of input current for the same percentage increase in torque?

 Series.
 Cummulative compound.
 Differntical compound.
  Shunt.

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Electrical Machines
Pole changing methods are suitable only for ___________ type induction motor.

  none of these.
  cage.
  wound.
  linear.

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Electrical Machines
Which type of single phase induction motor is having the highest power factor at full load ?

  Capacitor run type.
 Split phase type.
 Shaded pole type.
 Capacitor start.

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Electrical Machines
Which of the following DC Motor requires 3 point starter?

  Shunt motor.
  Series motor.
  Shunt, compound and series motor.
  Shunt motor as well as compound motors.

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MORE MCQ ON Electrical Machines

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