engineering recuitment MPPGCL JE 2024 Mock Test Environmental Engineering Quality and Characteristics of Sewage
The BOD test is carried out by determining the dissolved oxygen on the waste water or a diluted mixture at the beginning of the test period, incubating the waste water mixture at ______ °C, and determining the dissolved oxygen at the end of ______ days.
1
20, 5
2
30, 5
3
10, 5
4
30, 10