engineering recuitment Maharashtra WCD Water Conservation Officer Mock Test 2024 Environmental Engineering Quality and Characteristics of Sewage
If 2% solution of a sewage sample is inclubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D. of the sewage is
1
200 ppm
2
225 ppm
3
250 ppm
4
None of these