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Waste Water Engineering

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

Dilution
Purification
Irrigation
Oxidation

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Waste Water Engineering
The asbestos cement pipes are generally laid

Vertically
At an angle of 30°
At an angle of 60°
Horizontally

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Waste Water Engineering
If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is

100 ppm
200 ppm
150 ppm
50 ppm

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Waste Water Engineering
During purification process of sewage the gas given off, is

Hydrogen
Ammonia
All listed here
Carbon dioxide

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Waste Water Engineering
The first stage of neutral process of sludge digestion, is

None of these
Acid fermentation
Alkaline fermentation
Acid regression

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Waste Water Engineering
The digested sludge from septic tanks, is removed after a maximum period of

3.5 years
4 years
3 years
5 years

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