If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is_____________________? | MCQ Hive

Civil Engineering MCQs

Q If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is_____________________?

A A. 50 ppm
B B. 100 ppm
C C. 150 ppm
D D. 200 ppm

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