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Waste Water Engineering

Waste Water Engineering
For sewers, inverted siphon is provided for

Four pipes
Three pipes
Two pipes
One pipe

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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

Hydrochloric acid
Sulphuric acid
Nitric acid
Citric acid

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Waste Water Engineering
The dimensions of a rectangular settling tank are: length 24 m, width 6 m and depth 3 m. If 2 hour detention period for tanks is recommended, the rate of flow of sewage per hour, is

208 cu.m
212 cu.m
204 cu.m
216 cu.m

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Waste Water Engineering
In sewers the effect of scouring is more on

Horizontal side
All sides
Top side
Bottom side

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Waste Water Engineering
If the diameter of a sewer is 150 mm, the gradient required for generating self cleansing velocity, is

None of these
1 in 100
1 in 60
1 in 120

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Waste Water Engineering
The pH value of sewage is determined with the help of

None of these
Turbid meter
Imhoff Cone
Potentiometer

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