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Electrical Machines

Electrical Machines
A transformer has hysteresis loss of 30 W, at 240 V, 60 Hz. The hysteresis loss at 200 V, 50 Hz will be

 30 W.
 28 W.
 36 W.
 25 W.

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Electrical Machines
Which of the following relation is correct?

 Xd > Xq.
 Xd < Xq.
None of these
 Xd = Xq.

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Electrical Machines
Which of the following pairs is/are correct?

 closed slot----- leakage flux is high
 open slot----- leakage flux is less
 semi closed slot-----leakage flux is moderate
All of these

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Electrical Machines
In salient pole synchronous machine, maximum power occurs at a load angle of

 90°
 less than 90°
 Greater than 90°
 0°

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Electrical Machines
If the field winding connection of DC shunt motor is changed

 motor will not run.
 It will run in same direction.
 motor will become slow.
  It will run in opposite direction.

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Electrical Machines
Eb/Vt ratio of a DC motor is an indication of

 speed regulation.
 running torque.
 starting torque.
 efficiency.

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MORE MCQ ON Electrical Machines

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