Sewage Treatment Plant objective questions and answers
31. The grit chambers of sewage treatment plants, are generally cleaned after
A.2 days
B.5 days
C.12 days
D.14 days
✔ View Answer
C. 12 days
✍ Your Comments
32. The screens used for teh treatment of sewage are usually fixed
A.perpendicular to teh direction of flow
B.parallel to the direction of flow
C.at an inclination of 45° in vertcal plane
D.at an angle of 80° or 60° to the direction of flow
✔ View Answer
✍ Your Comments
33. Which of the following sewage normally requires treatment before disposing in the water
A.Domestic
B.Indutrial
C.School
D.Hospital
✔ View Answer
✍ Your Comments
34. For sewage, combined system be favoured where
A.Rainfall is concentrated in a season of the year and DWF is fluctuating
B.Rainfall is scattered throughout the year and DWF is tooo small compared to storm water
C.Rainfall is distributed throughout the year such that is <= 10 X DWF
D.City is on steep rocky slope.
✔ View Answer
✍ Your Comments
35. A Combined sewerage system collectively carries
A.Domestic sewage and industrial sewage
B.Storm sewage and domestic sewage
C.Storm sewage and industrial sewage
D.Storm sewage, domestic and industrial sewage
✔ View Answer
✍ Your Comments