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Waste Water Engineering

Waste Water Engineering
For sewers, inverted siphon is provided for

Three pipes
Four pipes
Two pipes
One pipe

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Waste Water Engineering
A circular sewer section is preferred to because

It provides maximum hydraulic mean depth
It provides maximum area for a given perimeter
It is cheaper in construction
All listed here

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Waste Water Engineering
If the over land flow from the critical point to the drain is 8 km and the difference in level is 12.4 m, the inlet time is

2 hours
4 hours
5 hours
3 hours

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Waste Water Engineering
Pathogens (or pathogenic bacterias) in water may cause

Cholera
All listed here
Dysentery
Typhoid

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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

1.49 m
1.59 m
1.69 m
1.39 m

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Waste Water Engineering
For detecting the nitrates in sewage, the colour may be developed by adding

Phenol-di -sulphuric acid and potassium hydroxide
Potassium permanganate
Sulphuric acid and napthamine
None of these

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