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DC Generators

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

Armature
Field
Brushes
Load

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DC Generators
The O. C. C. of a dc generator

May be same or different
Is different for different generators
None of the listed here
Is similar for all types of generators

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DC Generators
The efficiency of a dc generator is maximum when its variable loss is

Equal to double the constant loss
Equal to half of constant loss
None of the listed here
Equal to Constant loss

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DC Generators
To avoid formation of grooves in the commutator of a D.C. machine

The brushes of same polarity should track each other
The brushes of opposite polarity should track each other
All of these
Brush position has no effect on the commutator grooving

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DC Generators
The field coil of dc generator are usually made of

Mica
Copper
Carbon
Cast iron

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DC Generators
_____ together are called stray losses.

Frictional loss and copper loss
Field copper loss and iron loss
Copper and iron losses
Iron and friction losses

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MORE MCQ ON DC Generators

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