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Waste Water Engineering

Waste Water Engineering
In R.C. sewer pipes, the percentage longitudinal reinforcement to the cross-sectional area of concrete is kept

2
0.25
5
10

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Waste Water Engineering
Disposal to sewage in large cities, is done in

Irrigation
Dilution
Oxidation
Purification

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Waste Water Engineering
In sewage having fully oxidised organic matter, the nitrogen exists in the form of

Nitrates
Nitrites
Aluminoid nitrogen
Free ammonia

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Waste Water Engineering
It is customary to design a sewer for D.W.F. on the basis of

Twice the average demand
Average demand
Thrice the average demand
Four times the average demand

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Waste Water Engineering
The porosity of sediments in sewer pipes, is usually taken as

0.01
0.011
0.013
0.012

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Waste Water Engineering
Lead caulked joints are used for laying

I. pipes
Stone ware pipes
G.I. pipes
Earthenware pipes

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