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DC Generators

DC Generators
A 4-pole dc machine has _____ magnetic circuits.

4
8
6
2

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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
0.05 mm
0.5 m
0.005 mm

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

Hard copper
Soft copper
Carbon
All of above

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DC Generators
In dc generator, the constant losses is equal to

None of the listed here
Stray losses
Mechanical losses
Stray losses plus shunt cu loss

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DC Generators
For the same rating, a dc machine has_______ an ac machines.

Less weight than
The same weight as
None of the listed here
More weight than

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DC Generators
High voltage dc machine use _____ winding.

Either lap or wave
Wave
Lap
None of the listed here

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