The sewers . . . . . . . .
A. Must be of adequate size to avoid over flow
B. Must flow under gravity $$\frac{1}{2}$$ to $$\frac{3}{4}$$ full
C. Must be laid at least 2 to 3 m deep to collect /water from the basements
D. All the above
Answer: Option D
This Question Belongs to Civil Engineering >> Waste Water Engineering
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