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Which of the following is a disadvantage of a separate water carriage system?

(a) Low installation charge

(b) No loads on treatment units

(c) Lesser air contact with small sized sewer

(d) Provision of the automatic flushing tank is not required

The question was asked in quiz.

My question is taken from Water Carriage System topic in chapter Water Supply for Building, Collection and Conveyance of Sewage, Waste Water Flow Rate of Environmental Engineering

1 Answer

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The correct choice is (c) Lesser air contact with small sized sewer

For explanation: In a separate water carriage system, because of lesser air contact with small sized sewer, foul smell is formed due to the formation of sewage gas.

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