Water Treatment Plant objective questions and answers
36. Self-cleansing velocities in sewers are achieved by
A.Providing large diameter sewer pipes
B.Providing minimum bends in sewer lines
C.Providing smooth surface of sewer pipes
D.Providing adequate gradient to sewer lines
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D. Providing adequate gradient to sewer lines
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37. Which of the following materials is not commonly used in the construction of a sewer line?
A.Aluminium
B.Polythylene
C.Asbestos cement
D. Virtified clay
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38. Top manholes are generally provided on sewers for
A.Industrial areas
B.Hilly town ships
C.Cities in plains
D.Large townships
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39. Dry water flow in a combined sewer, is
A.industrial sewage
B.domestic sewage
C.storm water
D.inclusive of domestic and industrial sewage but excludes storm water
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40. The sewer which received discharge from twoor moremain sewers, is known as
A.a trunk sewer
B.an outfall sewer
C.a main sewer
D.an intercepting sewer
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