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Electrical Machines

Electrical Machines
Diverters are used only in

 either of these
 series motors
 shunt motors
None of these

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Electrical Machines
When operating, two or more transformers in parallel, % impedance of these transformers should be

  same.
 such that actual impedance of all transformers would be same.
 proportionate to MVA rating of transformers.
 inversely proportional to MVA rating of transformers.

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Electrical Machines
Which 1 - Φ motor does operate at high power factor?

  Shaded pole.
  Split phase.
  Capacitor run.
  Capacitor start.

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Electrical Machines
The back emf produced in a dc motor depends on

  P.
  none of these.
  P and Z.
  Z.

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Electrical Machines
If an induction machine is run at above the synchronous speed it acts as

 an induction motor
 a synchronous motor
None of these
 an induction generator

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

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

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