Environmental Engineering - Study Mode
[#6] The correct relation between theoretical oxygen demand (TOD), Biochemical oxygen demand (BOD) and Chemical oxygen demand (COD) is given by
Correct Answer
(B) TOD > COD > BOD
[#7] As compared to shallow wells, deep wells have
Correct Answer
(C) More discharge
[#8] As compared to cast iron pipes, steel pipes are
Correct Answer
(B) Stronger
[#9] In water treatment, rapid gravity filters are adopted to remove
Correct Answer
(D) Bacteria and colloidal solids
[#10] In facultative stabilization pond, the sewage is treated by
Correct Answer
(C) Dual action of aerobic bacteria and anaerobic bacteria