21. Dilution method of disposing of sewage, is not preferred to
22. In case of Imhoff tanks,
23. If a 2% solution of sewage sample is incubated for 5 days at 20°C and the dissolved oxygen depletion was found to be 8 mg/l. The BOD of the sewage is
24. If 2% solution of a sewage sample is incubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D. of the sewage is
25. If the depletion of oxygen is found to be 2.5 mg/litre after incubating 2.5 ml of sewage diluted to 250 ml for 5 days at 20°C, B.O.D. of the sewage is
26. If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is
27. If the discharge of a sewer running half is 628 1.p.s., i = 0.001, and n = 0.010, the diameter of the sewer, is
28. Acid regression stage of sludge digestion at a temperature 21°C extends over a period of
29. For non-scouring velocity 5 m/sec, the type of sewers generally preferred to, is
30. A manhole is generally provided at each
Read More Section(Waste Water Engineering)
Each Section contains maximum 100 MCQs question on Waste Water Engineering. To get more questions visit other sections.