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DC Generators

DC Generators
The O. C. C. of a dc generator is also called its_______ characteristic.

Internal
No load saturation
External
Performance

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DC Generators
For a D.C. machines laboratory following type of D.C. supply will be suitable

Mercury are rectifier
Induction motor D.C. generator set
Rotary converter
Synchronous motor D.C. generator set

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DC Generators
Dc machines which are subjected to abrupt changes of load are provided with

Interpole windings
Copper brushes
Equalisers
Compensating windings

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DC Generators
An exciter for a turbo generator is a

Compound generator
Separately excited generator
Series generator
Shunt generator

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DC Generators
The field winding of a dc shunt machine usually caries _______ of the rated current of the machine.

Less than 0.5 %
2% to 5%
15 to 25%
More than 20%

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DC Generators
In dc generator, the constant losses is equal to

Stray losses plus shunt cu loss
Mechanical losses
Stray losses
None of the listed here

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