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DC GENERATORS

DC Generators
The commutator pitch for simplex lap winding is equal to

None of the listed here
Numbers of poles in the machine
Number of pairs of poles
1

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DC Generators
The brush voltage drop in dc machine is about _______

2 V
20 V
10 V
0.1 V

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DC Generators
Carbon brushes are used in a dc machine because _______

Carbon lubricates and polishes the commutator
None of the listed here
Carbon is cheap
Contact resistance is decreased

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DC Generators
The armature winding of a dc machine is ______ winding.

Partly open circuit and partly closed circuit
None of the listed here
An open circuit
A closed circuit

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DC Generators
The field structure of a dc machine uses ______

Both salient and non salient pole arrangements
Salient pole arrangements
None salient pole arrangements
None of the listed here

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