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.Management Sciences
Category: Waste Water Engineering
The gradient of sewers depends upon_________________?
A. Velocity of flow
B. Diameter of the sewer
C. Discharge
D. All the above
The asbestos cement sewers are_________________?
A. Light in weight
B. Not structurally strong to bear large compressive stress
C. Susceptible to corrosion by sulphuric acid
D. All the above
Dilution method of disposing of sewage, is not preferred to_______________?
A. When sewage is fresh
B. When diluting water has high dissolved oxygen content
C. When diluting water is used for water supply near the point of sewage disposed
D. When the diluting water is having flow currents
The disintegrating pump in which solid matter is broken up before passing out, is__________________?
A. Centrifugal pump
B. Reciprocating pump
C. Pneumatic ejector
D. None of these
If the depth of partial flow in a sewer of diameter 2 m, is 50 cm, its wetted perimeter is____________________ ?
A. 1/3
B. 0/2
C. 0/3
D. 2 /3
Imhoff cone is used to determine_____________________?
A. Settleable solids
B. Suspended solids
C. Dissolved solids
D. None of these
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
Nitrogen cycle of sewage, is____________________?
A. Liberation of ammonia-formation of nitrites-formation of nitrates-liberation of nitrogen
B. Liberation of nitrogen-liberation of ammonia-formation of nitrites- formation of nitrates
C. Liberation of nitrogen-formation of nitrates-formation of nitrites-liberation of ammonia
D. Formation of nitrates-formation of nitrites-liberation of nitrates-liberation of nitrates
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