Important Electrical Machine Design Multiple Choice Questions and Answers

6.  Which of the following is the commonly used type of electromagnets ?

   A. Flat faced armature time

   B. Horse shoe type

   C. Flat faced plunger type

   D. All of the above

7.  The distance between the stars of two consecutive coils is measured in terms of coil sides is called

   A. Front pitch

   B. Winding pitch

   C. Commutator pitch

   D.Back pitch

8.  When the two coil sides forming a coil are spaced exactly one pole pitch apart they are said to be of

   A. Short pitch

   B. Full pitch

   C. Either of the above

   D. None of the above

9.  Direct water cooling of rotor winding presents

   A. No mechanical difficulties

   B. Lesser mechanical difficulties

   C. Greater mechanical difficulties

   D. None of the above

10.  The value of exciting or magnetising current depends upon which of the following factors?

   A. Total m.m.f. required

   B. The number of turns in the exciting winding

   C. The way in which the winding is distributed

   D. All of the above

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