The chemical most commonly used to increase speed of sedimentation of sewage is
A. Sulphuric acid
B. Copper sulphate
C. Lime
D. Sodium permanganate
Answer: Option C
This Question Belongs to Civil Engineering >> Environmental Engineering
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The distribution mains are designed for
A. Maximum daily demand
B. Maximum hourly demand
C. Average daily demand
D. Maximum hourly demand on maximum day
Sewage treatment units are designed for
A. Maximum flow only
B. Minimum flow only
C. Average flow only
D. Maximum and minimum flow
A. 4.5 to 6.0
B. 6.5 to 8.0
C. 8.5 to 10.0
D. 10.5 to 12.0
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