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Electrical Machines

Electrical Machines
In a synchronous motor, damper windings are provided on

  pole faces.
None of these
  rotor shaft.
  stator frame.

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Electrical Machines
Larger values of air flux density is taken while designing IM for

  larger output.
  both.
  none.
  larger bore diameter.

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Electrical Machines
Which type of single phase induction motor is having the highest power factor at full load ?

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

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Electrical Machines
A slip ring Induction motor runs at 290 rpm at full load, when connected to 50 Hz supply. Determine the number of poles and slip.

  P = 50, s = 4.43 %.
  P = 40, s = 5.79 %.
  P = 60, s = 0.96 %.
  P = 20, s = 3.33 %.

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Electrical Machines
Which of these types of motor is self starting?

  Poly-phase induction motor.
  None of these.
  Poly-phase synchronous machine.
  Single phase induction motor.

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Electrical Machines
Example of double excited machine is

None of these
 DC Shunt Motor
 Synchronous motor.
 Both are correct.

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MORE MCQ ON Electrical Machines

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