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Waste Water Engineering

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

30 days
15 days
90 days
60 days

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Waste Water Engineering
15 cumecs, the depth d and width are related by For drains up to

B = 0.5 d
d = 0.2 B
B = 0.2 d
d = 0.5 B

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Waste Water Engineering
The width of a settling tank with 2 hour detention period for treating sewage 378 cu m per hour, is

6.5 m
5 m
5.5 m
7 m

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Waste Water Engineering
The rate of accumulation of sludge per person per year, is

20 litres
25 litres
15 litres
10 litres

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Waste Water Engineering
In normal conditions, the period for sludge digestion, is

30 days
20 days
60 days
10 days

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Waste Water Engineering
The sewer which resists sulphide corrosion, is

Lead sewer
R.C. sewer
Cast iron sewer
Brick sewer

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