Synchronous Motor Multiple Choice Questions and Answers


16. A synchronous motor can be started by


   A.Pony Motor

   B.D.C. compound winding

   C.Providing damper winding

   D.None of the above

.


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D.None of the above

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17. Mostly, synchronous motors are of


   A.Alternator type machines

   B.Induction type machines

   C.Salient pole type machines

   D.Smooth cylindrical type machines


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C.Salient pole type machines

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18. A synchronous machine is called a doubly excited machine because


   A.It can be overexcited

   B.It has two sets of rotor poles

   C.Both its rotor and sator are excited

   D.It needs twice the normal exciting current


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C.Both its rotor and sator are excited

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19. The power development by a synchronous motor will be maximum when the load angle is


   A.Zero

   B.450

   C.900

   D.1200


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C.900

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20. Synchronous motor always runs at


   A.The synchronous speed

   B.Less than synchronous speed

   C.More than synchronous speed

   D.None of the above


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A.The synchronous speed

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