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Waste Water Engineering

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

8 to 10 mm
2 to 3 mm
5 to 8 mm
3 to 5 mm

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Waste Water Engineering
Sewer manholes are generally provided at

The junctions of sewers
The change of gradient
The change of direction
All of these

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Waste Water Engineering
The coagulant which is generally not used for treating the sewage, is

Ferric sulphate
Ferric chloride
Alum
Chlorinated coppers

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Waste Water Engineering
The sewage is pumped up

From flat areas
All listed here
From low lying areas
From basements

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Waste Water Engineering
Flocculated particles do not change their

Size
Weight
Shape
None of these

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Waste Water Engineering
The minimum diameter of sewer to be adopted is

15 cm
10 cm
12.5 cm
25 cm

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