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Waste Water Engineering

Waste Water Engineering
The water carried sewerage system removes

Storm sewage
Domestic sewage
Industrial sewage
All listed here

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Waste Water Engineering
If D is the diameter of a circular sewer and D’ is the top horizontal diameter of an equivalent egg shaped section, the relationship which holds good, is

D’ = 0.94 D
D’ = 0.64 D
D’ = 0.74 D
D’ = 0.84 D

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Waste Water Engineering
The factor responsible for purification of sewage in river is

Hydrology
Temperature
All listed here
Dissolved oxygen in water

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Waste Water Engineering
In a city the ratio of the drainage to sewage is 20, the percentage discharge passing through non-monsoon periods, is

10
20
15
5

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Waste Water Engineering
The rate of accumulation of sludge per person per year, is

15 litres
10 litres
25 litres
20 litres

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Waste Water Engineering
The sewage is pumped up

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

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