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


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E.Synchronous motor

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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


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B.Directly opposes it

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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


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A.Small induction motor

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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


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A.Not start

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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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B.Synchronous motor

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