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in Environmental Engineering by (81.4k points)
The design period of main and branch sewer is ___________

(a) 5years

(b) 10years

(c) 30years

(d) 40years

I have been asked this question during an online exam.

My question comes from Dry Weather Flow in portion Water Supply for Building, Collection and Conveyance of Sewage, Waste Water Flow Rate of Environmental Engineering

1 Answer

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Best answer
Correct option is (c) 30years

The explanation is: The main and branch sewer is designed for the population that may occur at the end of one generation of 30 years.This period of 30 years is called a design period.

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