DC Generators
The nature of armature winding of a dc machine is decided by

Front pitch
Commutator pitch
None of the listed here
Back pitch

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DC Generators
When two D.C. generators are running in parallel an equalizer bar is used

To increase the series flux
So that the two identical machines will pass approximately equal currents to the load
To reduce the combined effect of armature reaction of both the machines
To increase the generated e.m.f.

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DC Generators
Lap winding is composed of

Any odd number of conductors
That even number which is exact multiple of poles
That even number which is exact multiple of poles + 2
Any even number of conductors

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