Environmental Engineering Mcqs
Q. In a BOD test, 1.0 ml of raw sewage was diluted to 100 ml and the dissolved oxygen concentration of diluted sample at the beginning was 6 ppm and it was 4 ppm at the end of 5 day incubation at 20°C. The BOD of raw sewage will be___________?
a. 100 ppm
b. 200 ppm
c. 300 ppm
d. 400 ppm
No explanation is available for this question!
