Manholes on sewer lines are provided for :

(a) removal of part of sewage
(b) All of three mentioned here
(c) periodic cleaning
(d) providing air for oxidation

Anurag Mishra Professor Asked on 31st December 2015 in Physics.
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1 Answer(s)

Answer: (c) periodic cleaning

Anurag Mishra Professor Answered on 3rd January 2016.
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