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Waste Water Engineering

Waste Water Engineering
The angle subtended by the surface of sewer water with partial flow, at sewer centre is 120°, the depth of sewerage is

50 cm
25 cm
40 cm
20 cm

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Waste Water Engineering
The minimum recommended diameter of sewers, is

5 cm
10 cm
20 cm
15 cm

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Waste Water Engineering
Imhoff cone is used to measure

Settleable solids
Total organic solids
Total solids
Total in organic solids

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Waste Water Engineering
Sewer pipes are designed for maximum discharge with 25% to 33% vacant cross-sectional area for

Unexpected increase in the population
All of these
Under estimates of maximum and average flows
Unexpected large scale infiltration of stream water

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Waste Water Engineering
To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of

Citric acid
Hydrochloric acid
Nitric acid
Sulphuric acid

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Waste Water Engineering
With self cleansing velocity in sewers

Silting occurs at bottom
Neither silting nor scouring occurs at bottom
Scouring occurs at bottom
Both silting and scouring occur at bottom

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MORE MCQ ON Waste Water Engineering

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