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Electrical Machines

Electrical Machines
What are slot wedges in a DC machine made of?

 Mild steel.
 Silicon steel.
 Fibre.
 Cast iron.

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

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Electrical Machines
Two DC series motors are connected in series and are driving the same mechanical load. If the motors are now connected in parallel the speed will become

 double.
 4 times.
 half.
 one fourth.

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Electrical Machines
Iron loss in a transformer mainly occurs in

 iron made tank of transformer.
 winding of transformer.
 steel core in transformer.
 transformer insulating oil.

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Electrical Machines
A 230 V dc series generator is driven at its rated speed. The no-load voltage across its armature terminals would be

 somewhat more than 230 V
 somewhat less than 230 V
 6 V
 230 V

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Electrical Machines
In shapers and slotters which motor are preferred?

  Slip ring IM.
  Synchronous motor.
  Squirrel cage IM.
  Double cage motor.

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MORE MCQ ON Electrical Machines

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