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Waste Water Engineering

Waste Water Engineering
The standard B.O.D. of water is taken for

3 days
1 day
2 days
5 days

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Waste Water Engineering
In olden days the type of section adopted in trunk and out fall sewers was

Egg shaped
Horse shoe shaped
Parabolic shaped
Circular shaped

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Waste Water Engineering
If the side of a square sewer is 1000 mm, the diameter of a hydraulically equivalent circular section, is

1095 mm
1075 mm
1065 mm
1045 mm

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Waste Water Engineering
The spacing of bars for perforations in coarse screens used for the treatment of sewage, is

40 mm
30 mm
50 mm
20 mm

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

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Waste Water Engineering
Ventilating shafts are provided to a sewer line at every

100 m
150 m
300 m
200 m

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MORE MCQ ON Waste Water Engineering

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