Waste Water Engineering - Study Mode
[#131] The detention period for plain sedimentation water tanks, is usually
Correct Answer
(A) 4 to 8 hours
[#132] The minimum recommended diameter of sewers, is
Correct Answer
(C) 15 cm
[#133] 3.0 ml of raw sewage is diluted to 300 ml. The D.O. concentration of the diluted sample at the beginning of the test was 8 mg/l. After 5 day-incubation at 20°C, the D.O. concentration was 5 mg/l. The BOD of raw sewerage is
Correct Answer
(C) 300 mg/l
[#134] 1000 kg of sewage contains
Correct Answer
(D) Both A and C of above
[#135] Water content of sewage is about
Correct Answer
(D) 99.9 %