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WASTE WATER ENGINEERING

Waste Water Engineering
The algae dies out in the zone of

Recovery
Active decomposition
Degradation
Cleaner water

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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
None of these
Potassium permanganate
Sulphuric acid and napthamine

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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
Potassium permanganate
None of these

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Waste Water Engineering
The average temperature of sewage in India, is

10°C
25°C
20°C
15°C

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Waste Water Engineering
Fresh sewage is generally

A source of objectionable odour
Acidic
Alkaline
Highly decomposed

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