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DC Generators

DC Generators
Brushes of D.C. machines are made of

Soft copper
Carbon
All of above
Hard copper

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DC Generators
The greatest eddy current loss occurs in the _____ of a dc machine.

Field poles
Armature
Yoke
Commutating poles

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DC Generators
Which of the following generating machine will offer constant voltage on all loads?

Level compounded generator
Separately excited generator
Self-excited generator
All of these

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DC Generators
Which of the following could be lamina proximately the thickness of laminations of a D.C. machine?

5 m
0.005 mm
0.5 m
0.05 mm

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DC Generators
The number of parallel paths in a simplex lap winding is equal to

Number of pairs of poles
Number of poles
2
None of the listed here

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DC Generators
The main drawback of a dc shunt generator is that

Generated voltage is small
Terminal voltage drops considerably
It is expensive
Shunt field circuit has high resistance

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