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Electrical Machines

Electrical Machines
Slip rings of an induction motors are made of

  carbon.
  phosphor bronze.
  stainless steel.
  aluminium.

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Electrical Machines
Capacitor start capacitor run provides

  high power factor only.
  high staring torque and high power factor.
  none.
  high staring torque only.

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Electrical Machines
The magnetic field which initially induces emf in the armature in a self excited DC generator is because of

None of these
  residual magnetism.
 armature reaction.
  permanent magnets.

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Electrical Machines
Which of the following is/are not a self starting motor?

None of these
 both 1 and 2
 3-phase induction motor
 1-phase induction motor

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Electrical Machines
In DC machines internal characteristics are plotted between

 Eg vs load current
 Vt vs load current
 Eg vs Ia
 Vt vs Ia

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Electrical Machines
Universal motor have which of the following application?

  Food mixer.
  Lift.
  Domestic pump.
  Traction.

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MORE MCQ ON Electrical Machines

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