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Waste Water Engineering

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

Dissolved oxygen in water
All listed here
Hydrology
Temperature

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Waste Water Engineering
In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient,

Is trebled
Is only provided
Is doubled
Is not enough

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Waste Water Engineering
R.M.O. expenses include

Maintenance expenses
All of these
Operation expenses
Running expenses

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Waste Water Engineering
The temperature affects the

Viscosity of sewage
Solubility of gases in sewage
All of these
Biological activity of bacteria in sewage

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Waste Water Engineering
The sewerage system consists of

Lateral sewer
All of these
Branch sewer
House sewer

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Waste Water Engineering
If the discharge of a sewer running half is 628 1.p.s., i = 0.001, and n = 0.010, the diameter of the sewer, is

1.59 m
1.69 m
1.39 m
1.49 m

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