Winding Of Direct Current Machine Objective Questions and Answers


36.  A frog-leg winding is used in a DC machine to eliminate


   A. The use of equalizers in lap winding

   B. The use of compensating winding

   C. Reactance voltage produced due to communication

   D. None of the above


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A. The use of equalizers in lap winding

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37.  Number of tappings to equalizer ring is equal to number of


   A. Poles

   B. Pole pairs

   C. Parallel paths

   D. Commutator segments


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B. Pole pairs

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38.  In a DC machine armature winding, the number of commentators segments is equal to the number of armature


   A. Coils

   B. Coil sides

   C. Conductors

   D. Turns


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A. Coils

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39.  For both lap and wave windings there are as many commutator bars as the number of


   A. Armature conductors

   B. Winding elements

   C. Poles

   D. Slots


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B. Winding elements

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40.  In a DC machine fractional pitch winding is employed to


   A. Increase generated voltage

   B. Reduce sparking

   C. Save copper

   D. Both B and C


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D. Both B and C

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