Sewage Treatment Plant objective questions and answers
46. The gas which may cause explosion in sewers is
A.Carbondioxide
B.Methane
C.Ammonia
D.Carbon monoxide
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B. Methane
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47. Imhoff cone is used to measure
A.Total organic solids
B.Total solids
C.Total in organic solids
D.Settleable solids
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48. In servers designed with self cleansing velocity,
A.The bottom is silted
B.The bottom is scoured
C.Both silthing and scouring occur at the bottom
D.Neither silting not scouring at the bottom.
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49. A septic tank is
A. An aerobic method of on-site sewage treatment
B. An anaerobic method of on-site treatment
C. A phhysical method of water treatment
D. A physico-chemical method of watertreatment
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50. The large sized sewage solids are broken into smaller size using a
A.Dumper
B.Shredder
C.Evacuator
D.Trap
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