DC Generators – Page 2 – HI MCQ!

The e.m.f. generated in a D.e. generator is directly proportional to?

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Following energized winding of a D.C. machine should not be opened as it would produce high inductive voltage which may be dangerous to personnel and may cause its own insulation failure?

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Two D.C. shunt generators, each with armature resistance of 0.02 ohm and field resistance of 50 ohm run in parallel and supply a total current of 1000 amperes to the load circuit. If their e.m.f are 270 V and 265 V, their bus bar voltage will be?

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If a self excited DC generator after being installed, fails to build up on its first trial run, the first thing to do is to?

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Copper brushes in D.C. machine are used?

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While applying Fleming’s right-hand rule to find the direction of induced e.m.f., the thumb points towards?

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

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The field coils of D.C. generator are usually made of?

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A 220 V D.C. generator is run at full speed without any excitation .The open circuit voltage will be?

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ln lap winding, the number of brushes is always?

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