Synchronous Motor Multiple Choice Questions and Answers

36. A rotory converter can also be run as a

   A.D.C. shunt motor

   B.D.C. series motor

   C.D.C. compound motor

   D.Induction motor

   E.Synchronous motor

37. When 3-phase synchronous generator is supplying a zero power factor lagging load, the armature field affects the main field in the following way

   A.Arguments it directly

   B.Directly opposes it

   C.Cross-magnetises it

   D.None of the above

38. A pony motor is basically

   A.Small induction motor

   B.D.C series motor

   C.D.C shunt motor

   D.Double winding A.C/D.C motor

39. In case one phase of a three-phase synchronous motor is short-circuited the motor will

   A.Not start

   B.Run at 2/3 of synchronous speed

   C.Run with excessive vibrations

   D.Take less than the rated load

40. In which of the following motors the stator and rotor magnetic field rotate at the same speed

   A.Universal motor

   B.Synchronous motor

   C.Induction motor

   D.Reluctance motor

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