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Waste Water Engineering

Waste Water Engineering
The water carried sewerage system removes

Domestic sewage
Storm sewage
All listed here
Industrial sewage

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Waste Water Engineering
In sewage, the solids in mg per litre is

1500 to 2000
1000 to 1500
100 to 500
500 to 1000

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Waste Water Engineering
Drop manholes at the junctions of sewer lines, are provided if

Ordinary manhole cannot be built
Invert level of a branch sewer is more than 60 cm that of the main sewer
Sewer line runs along a main road
Two sewer lines intersect

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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
1045 mm
1065 mm

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Waste Water Engineering
1000 kg of sewage contains

0.112 kg in solution
0.225 kg in solution
Both A and C of above
0.112 kg in suspension

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Waste Water Engineering
In Chezy’s formula V = C rs for calculating the velocity of flow in circular sewer of diameter running full, the value of hydraulic mean radius is

D/2
D/1
D/3
D/4

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