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Electrical Machines

Electrical Machines
What is the highest possible speed of turbo alternators?

 3000 rpm
 1000 rpm
 4000 rpm
 1500 rpm

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Electrical Machines
In shunt dc motor the direction of rotation of the motor will reversed. When

  none of above.
  only field terminals are changed.
  only armature terminals are reversed.
  either field terminals are reversed or armature terminals are reversed.

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Electrical Machines
Select the motor that should not be started on no load?

  Series motor.
 Brushless DC motor.
 Shunt motor.
 Compound motor.

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Electrical Machines
The principal of starting of 3 - Φ IM is similar to

  capacitor run IM.
  transformer with short-circuited secondary.
  synchronous motor.
  repulsion motor type starting.

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Electrical Machines
Lap winding is prefered for which type of machines?

 low current and low voltage
 high current and low voltage
 low current and high voltage
 high current and high voltage

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Electrical Machines
Capacitor fitted with ceiling / table fans is of the value of

  2 - 3 µF.
 0.1 µF.
  1 - 2 µF.
 5 - 10 F.

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MORE MCQ ON Electrical Machines

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