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Electrical Machines

Electrical Machines
In a transformer zero voltage regulation is achieved at a load power factor which is

 unity
 leading
 lagging
 zero

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Electrical Machines
A 4 pole dc generator is running at 1500 rpm the frequency of current in the armature winding is

 50Hz.
 200Hz.
 100Hz.
 150Hz.

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Electrical Machines
If the no-voltage release in a DC motor starter fails to operate on failure of supply, on resumption of supply the motor will

 develop very low starting torque.
 get damaged.
 start automatically without trouble.
 not start automatically.

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Electrical Machines
Which of the following motor is used in grinders?

  Capacitor start capacitor run IM.
  Split phase IM.
  Synchronous motor.
  Capacitor start IM.

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Electrical Machines
Swinburne test is conducted under which of the following condition?

 no load
 any of the above
 full load
 half load

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Electrical Machines
Type of single phase motor having highest power factor at full load is

  capacitor start.
  shaded pole type.
  capacitor run.
  split phase.

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MORE MCQ ON Electrical Machines

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