Water Treatment Plant objective questions and answers
46. A sewer which receives storm water, surface run-off and sewage is called a
A.Common sewer
B.Combined sewer
C.Branch sewer
D.Outfall sewer
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B. Combined sewer
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47. The equipment used for checking the levels of the sewer inverts is
A.Dumpy level
B.Theodolite
C.Bonding rod
D.All of the above
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48. Sewers provided with underdrains having freeboutlets do not account for sewage discharge due to
A.Infiltration
B.Water losses
C.Seepage
D.Sub-soil condition
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49. The equipment used for removing paper and rags from sewers is called
A.Gouge
B.Scoop
C.Claw
D.Scraper
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50. The lowvelocity in sewer pipe may cause
A.Excavation
B.Choking
C.Deposition of solids
D.Underflowing
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