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DC Generators

DC Generators
The insulating material used between the commutator segments is normally

Mica
Graphite
Paper
Insulating varnish

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DC Generators
If residual magnetism is present in a D.C. generator, the induced e.m.f. at zero speed will be

Zero
The same as rated voltage
Small
High

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DC Generators
Which of the following generator provides approximately constant voltage from no load to full load?

Over compounded
Series
Flat compounded
Shunt

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DC Generators
High voltage dc machine use _____ winding.

None of the listed here
Either lap or wave
Lap
Wave

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DC Generators
The real working part of a dc machine is the ______

Armature winding
None of the listed here
Commutator
Field winding

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DC Generators
The armature of a dc machine is made of ______

Cast steel
Wrought iron
Soft iron
Silocon steel

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