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DC Generators

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

Cast iron
Copper
Carbon
Mica

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DC Generators
Which of the following generating machine will offer constant voltage on all loads?

Separately excited generator
All of these
Level compounded generator
Self-excited generator

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DC Generators
Wave wound generators provide

More current and more voltage
More current but less voltage
None of the listed here
Less current but more voltage

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

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

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

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

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DC Generators
Open circuited armature coil of a D.C. machine is

Indicated by a spark completely around the commutator
None of these
Identified by the scarring of the commutator segment to which open circuited coil is connected
Both of the listed here

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