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Waste Water Engineering

Waste Water Engineering
For trunk and out-fall, the type of sewers generally used, is

Circular shaped
Standard egg shaped
Horse shoe shaped
Parabolic shaped

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Waste Water Engineering
The most dangerous pollutant in vehicular emissions is

CO₂
O₂
SO₂
CO₂

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Waste Water Engineering
For a grit chamber, if the recommended velocity of flow is 0.2 m/sec and detention period is 2 minutes, the length of the tank, is

30 m
16 m
20 m
24 m

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Waste Water Engineering
In a sludge digestion tank if the moisture content of sludge V1 litres is reduced from p1 % to p2 % the volume V2 is

[(100 – P1)/(100 + P2)] V1
[(100 + P1)/(100 – P2)] V1
[(100 + P2)/(100 – P1)] V1
[(100 – P1)/(100 – P2)] V1

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Waste Water Engineering
The drop man holes are generally provided in sewers for

Cities in plains
Large town ships
Industrial areas
Hilly town ships

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Waste Water Engineering
5 days-biochemical oxygen demand (BOD5) is taken at a temperature of

20°C
0°C
25°C
15°C

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