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DC Generators

DC Generators
The yoke of a dc machine carries ______ pole flux.

One-half of
None of the listed here
Three times
Two times the

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

Series
Over compounded
Shunt
Flat compounded

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DC Generators
The brush voltage drop in dc machine is about _______

10 V
20 V
2 V
0.1 V

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DC Generators
The bearings used to support the rotor shafts are generally

Needle bearings
Bush bearings
Magnetic bearings
Ball bearings

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DC Generators
A separately excited generator as compared to a self-excited generator

Is more stable
Is amenable to better voltage control
Has exciting current independent of load current
Has all above features

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DC Generators
In D.C. generators, the brushes on commutator remain in contact with conductors which

Are farthest from the poles
Lie under interpolar region
Lie under South Pole
Lie under North Pole

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