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Electrical Machines

Electrical Machines
DC machine windings are

 short pitched
None of these
 full pitched
 either of these

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

  Effiency.
 Speed regulation.
 Starting torque.
 Running Torque.

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Electrical Machines
DC series motor is best suited for electric traction as

 It runs at very high speed at light load.
 It is cheaper in cost.
 It consume less power.
  It develops high starting torque.

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Electrical Machines
A synchorous generator connected to an infinite bus is over excited. Considering only the reactive power from the point view of the system the machine acts as

 A resistor.
  None of these.
 an inductor.
 A capacitor.

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Electrical Machines
A lap wound 4 pole dc motor has 460 conductors. Find the number of parallel paths between the conductors?

 6.
  data provided is insufficient.
  4.
  2.

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Electrical Machines
Which of the following is not a necessary condition to be satisfied for synchronising an incoming alternator to an already operating alternator?

 same prime mover speed
 same frequency
 same phase sequence
 same voltage magnitude

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