Sewage Treatment Plant objective questions and answers
26. Sewage treatment in an oxidation pond is accomplished primarily by
A.Algal-bacterial symbosis
B.Carbon monoxide
C.Nuclear radiation
D.Carbon dioxide
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A. Algal-bacterial symbosis
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27. Sewage contains a major percentage of water and only .................... of solids
A.10%
B.1%
C.0.1%
D.0.01%
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28. Primry treatment of sewage consists of removal of
A.Large suspended organic solids
B.Oil and grease
C.Sand and girt
D.Floating materials
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29. The average temperature of sewage in india, is
A.100 C
B.150 C
C.200 C
D.250 C
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30. The spacing of bars of perforation of fine screend used for the traetmentof sewage, is
A.2 to 3 mm
B.3 to 5 mm
C.5 to 8 mm
D.8 to 10 mm
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