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DC Generators

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

0.1 V
2 V
10 V
20 V

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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
Self-excited generator
Level compounded generator

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DC Generators
A 4-pole , lap wound dc shunt generator has an armature winding consisting of 220 turns each of 0.004 Ω. The armature resistance is

1 Ω
0.025 Ω
0.5 Ω
0.055 Ω

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DC Generators
The main factor which leads to unstable parallel operation of flat and over compounded generators is

unequal series field resistances
their rising voltage characteristics
unequal number of turns in their series field windings
unequal speed regulation of their primemovers

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DC Generators
In case of D.C. machine winding, number of commutator segments is equal to

Number of armature coils
Number of armature coil sides
Number of armature turns
Number of armature conductors

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DC Generators
High voltage dc machine use _____ winding.

Lap
Either lap or wave
Wave
None of the listed here

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