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Electrical Machines

Electrical Machines
We can apply source transformation to voltage source when a resistance is connected to it in

  10 HP.
 14 HP.
 15 HP.
  13 HP.

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Electrical Machines
The power factor of squirrel cage induction motor is

 low at light loads only
 low at rated load only
 both A and B
 low at heavy loads only

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Electrical Machines
The field system of an alternator is usually excited

  3 - Φ, 50 Hz and 400 V.
  230 V AC.
  110 / 220 V AC.
  250 / 250 V DC.

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

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

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Electrical Machines
Which of the following bearings and their uses are correct

 neither 1 nor 2
 roller bearings → large machines
 both A and B
 ball bearings → small machines

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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

 100Hz.
 50Hz.
 150Hz.
 200Hz.

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MORE MCQ ON Electrical Machines

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