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Electrical Machines

Electrical Machines
The current drawn by a DC motor at the time of starting is

 Normal.
 Zero.
 Very high.
 Very low.

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Electrical Machines
The wattage rating of a ceiling fan motor will be

 200 - 250 W.
 250 - 500 W.
 10 - 20 W.
  50 - 150 W.

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Electrical Machines
What is the actual arrangement of series wound generator?

 Armature winding is in series with load.
 Armature and field both are connected.
  Armature and field both are in series with the load.
 Armature and field both are parallel.

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Electrical Machines
Which of the following motor used in hair dryers?

  Cage induction motor.
  Synchronous motors.
  Shaded pole IM.
  Split phase IM.

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Electrical Machines
To get the speed of DC motor is more than normal without wastage of electrical energy _____________ is used.

  Ward Leonard control.
  Any of above method.
  Rheostatic control.
  None of above.

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Electrical Machines
Example of double excited machine is

 Both are correct.
 DC Shunt Motor
 Synchronous motor.
None of these

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