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D.C. Generators - section-1
  1. In D.C. generators, current to the external circuit from armature is given through

    2. A.

     Commutator
    B.

     Solid connection
    C.

     Slip rings
    D.

     None of above

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  2. In a four-pole D.C. machine

    3. A.

     All the four poles are north poles
    B.

     Alternate poles are north and south
    C.

     All the four poles are south poles
    D.

     Two north poles follow two south poles

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  3. The voltage drop for which of the following types of brush can be expected to be least?

    4. A.

     Graphite brushes
    B.

     Carbon brushes
    C.

     Metal graphite brushes
    D.

     None of the above

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  4. In a D.C. machine stray loss is the sum of

    5. A.

     Total copper loss and mechanical loss
    B.

     Armature copper loss and iron loss
    C.

     Shunt field copper loss and mechanical loss
    D.

     Iron loss and mechanical loss

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  5. Number of tapings for each equalizer ring is equal to

    6. A.

     Number of pole pairs
    B.

     Number of poles
    C.

     Number of parallel paths
    D.

     Number of commutator segments

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