The grit chambers of sewage treatment plants, are generally cleaned after
A. 2 days
B. 7 days
C. 12 days
D. 14 days
Answer: Option D
This Question Belongs to Civil Engineering >> Waste Water Engineering
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The effluent of a septic tank is
A. Fit for discharge into any open drain
B. Foul and contains dissolved and suspended solids
C. As good as that from a complete treatment
D. None of these
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A. 1 in 5
B. 1 in 10
C. 1 in 15
D. 1 in 20
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B. Without manhole covers
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