Question

Drained sewage has biological oxygen demand (BOD) :

• A. More than that of water
• B. Less than that of water
• C. Equal to that of water
• D. None of the above

Answer 1

Answer: (A)

More than that of water

Answer 2

Drained sewags has BOD value more than 17 ppm while clean water has less than 5 ppm.