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Waste Water Engineering

Waste Water Engineering
The drop man holes are generally provided in sewers for

Hilly town ships
Large town ships
Industrial areas
Cities in plains

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

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

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Waste Water Engineering
Are available in size Stoneware sewers

All of these
15 cm
20 cm
10 cm

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Waste Water Engineering
Acid regression stage of sludge digestion at a temperature 21°C extends over a period of

15 days
60 days
30 days
90 days

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

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

Dissolved oxygen in water
Hydrology
All listed here
Temperature

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