Hamad Waste Water Engineering 10/01/2021 A. 4 to 8 hours B. 8 to 16 hours C. 16 to 24 hours D. 24 to 36 hours Related Mcqs: The asbestos cement sewers are_________________?A. Light in weight B. Not structurally strong to bear large compressive stress C. Susceptible to corrosion by sulphuric acid D. All the above... If a 2% solution of sewage sample is incubated for 5 days at 20°C and the dissolved oxygen depletion was found to be 8 mg/l. The BOD of the sewage is_________________?A. 100 mg/l B. 200 mg/l C. 300 mg/l D. 400 mg/l... The first stage of neutral process of sludge digestion, is__________________?A. Acid fermentation B. Acid regressio C. Alkaline fermentation D. None of these... In sewage, the solids in mg per litre is__________________?A. 100 to 500 B. 500 to 1000 C. 1000 to 1500 D. 1500 to 2000... The sewage is pumped up_______________?A. From low lying areas B. From flat areas C. From basements D. All the above...
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