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Waste Water Engineering

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

3 hours
2 hours
4 hours
5 hours

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Waste Water Engineering
The presence of free ammonia in sewage, is detected by

Adding potassium permanganate
Phenol-di-sulphuric acid
Boiling
Adding sulphuric acid

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Waste Water Engineering
The minimum diameter of sewer to be adopted is

15 cm
25 cm
12.5 cm
10 cm

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Waste Water Engineering
Which one of the following gases is most significant as air pollutant?

Oxygen
Carbondioxide
Nitrogen
Sulphur-dioxide

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

All listed here
Typhoid
Cholera
Dysentery

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Waste Water Engineering
In a sludge digestion tank if the moisture content of sludge V1 litres is reduced from p1 % to p2 % the volume V2 is

[(100 + P1)/(100 – P2)] V1
[(100 – P1)/(100 – P2)] V1
[(100 – P1)/(100 + P2)] V1
[(100 + P2)/(100 – P1)] V1

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