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DC Generators

DC Generators
The critical resistance of the D.C. generator is the resistance of

Brushes
Load
Field
Armature

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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 armature winding of a dc machine is place on the rotor to ______

Reduce losses
Reduce armature reaction
Save iron
Facilitate commutation

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DC Generators
Which of the following components of a D.C, generator plays vital role for providing direct current of a D.C. generator?

Eye bolt
Equalizer rings
Commutator
Dummy coils

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DC Generators
In a lap winding, the number of the brushes required is equal to

Commutator pitch
Number of pairs of poles
None of the listed here
Number of poles

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DC Generators
If the value of shunt field resistance of a shunt generator is greater than the critical resistance, the generator will

None of the listed here
Fail to excite
Excite to full voltage
Excite to one half of full voltage

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