ELECTRICAL MACHINES QUIZ

 both 1 and 2

 1-phase induction motor

None of these

 3-phase induction motor

  DC series motor.

  Synchronous motor.

  Single phase induction motor.

  AC slip ring motor.

 15 %.

  10 %.

 50 %.

 25 %.

 severe sparking.

 any of above.

 rough commutator surface.

 imperfect contact.

 any of the above.

 single phase to three phase transformation.

 three phase to single phase transformation.

 three phase to two phase transformation.

 30 W

 less than 30 W

 more than 30 W

 zero watt

  Rotor mmf wave and stator mmf wave.

 Stator mmf wave and resultant flux density.

 Rotor mmf wave and resultant flux density wave.

 Stator mmf wave and resultant mmf wave.

 inversely as 1/Xs

 directly as synchronous reactances Xs

All of these

 directly as Xs2

  sipper.

  rotor can not have any laminations.

  thinner.

  thicker.

 any of the above

 linearised

 hyperbola

 parabola