Alternator Multiple Choice Questions and Answers

36. Which of the following coils in an alternator will have e.m.f. closer to sinewaveform?

   A.Distributed winding in full pitch coils

   B.Distributed winding in short pitch coils

   C.Concernted winding in full pitch coil

   D.Concernted winding in short pitch coils

37. The distribution factor, in alternators, is defined as the ratio of e.m.fs. of

   A.Distributed winding to full pitch winding

   B.Concentrated winding to distributed winding

   C.Distributed winding to concentrated winding

   D.Full pitch winding to distributed winding

38. In an alternator, when the load power factor is unity

   A.The armature flux will be demagnetising

   B.The armature flux will be crossmagnetising

   C.The armature flux will reduce to zero

   D.The armature flux will have square wave form

   E.None of the above

39. Two alternators are running in parallel. If the feild of one of the alternators is adjusted it will

   A.Change its power factor

   B.Change its frequency

   C.Reduce its speed

   D.Change its load

40. For parallel operation of the two alternators, desirable feature is that both should have

   A.Same reactance

   B.Same resistance

   C.More of resistance as compared to synchronous reactance

   D.Less of resistance as compared to synchronous reactance

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