engineering recuitment BARC Stipendiary Trainee Category I 2023 Mock Test Environmental Engineering Quality of Water
If a 2% solution of sewage sample is incubated for 5 days at 20°C and the dissolved oxygen depletion is 10 mg/L, then the BOD of the sewage would be
1
50 mg/L
2
2000 mg/L
3
500 mg/L
4
200 mg/L