Due to which of the following factors the brush wear rate is altered? Options: A . &nbspSpeed of the machine B . &nbspContact pressure C . &nbspSurface conditions of brush and commutator D . &nbspAll of the above

Due to which of the following factors the brush wear rate is altered?

Question - Due to which of the following factors the brush wear rate is altered?

Options:

A . Speed of the machine

B . Contact pressure

C . Surface conditions of brush and commutator

D . All of the above

Answer: Option D

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