Repulsion Motor Multiple Choice Questions and Answers

21. A repulsion motor is equipped with

   A.A commutator

   B.Slip-rings

   C.A repeller

   D.Neither (a) nor (b)

22. A repulsion-start induction-run single-phase motor runs as an induction motor only when

   A.Brushes are shifted to neutral plane

   B.Short-circuiter is disconnected

   C.Commutator segments are short-circuited

   D.Stator winding is reversed

23. In repulsion motor direction of rotation of motor

   A.Is opposite to that of brush shift

   B.Is the same as that of brush shift

   C.Is independent of brush shift

24. In repulsion motor, maximum torque is developed when

   A.Brush axis is at 45^{0 electrical to the field axis}

   B.Brush axis coincides with the field axis

   C.Brush axis is at 90^{0 electrical to the field axis}

   D.None of the above

25. Speed torque characteristic of a repulsion induction motor is similar to that of a D.C.

   A.Shunt motor

   B.Series motor

   C.Compound motor

   D.Separately excited motor

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