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Waste Water Engineering

Waste Water Engineering
In a city the ratio of the drainage to sewage is 20, the percentage discharge passing through non-monsoon periods, is

5
20
10
15

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Waste Water Engineering
Dried sewage after treatment is used as

Base material for paints
Fertilizer
Chemical for lowering B.O.D.
Building material

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Waste Water Engineering
The rate of accumulation of sludge in septic tanks is recommended as

30 litres/person/year
30 litres/person/month
25 litres/person/month
25 litres/person/year

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Waste Water Engineering
The spacing of man holes along a straight portion of a sewer is 300 m, the diameter of the sewer may be

1.2 m
0.9 cm
1.5 m
> 1.5 m

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Waste Water Engineering
The settling velocity of a spherical particle of diameter less than 0.1 mm as per Stock’s law, is

Vs = 418 (Gs – Gw) d [(3T + 70)/100]
Vs = 218 (Gs – Gw)d [(3T + 70)/100]
Vs = 418 (Gs – Gw)d² [(3T + 70)/100]
Vs = 218 (Gs – Gw)d² [(3T + 70)/100]

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Waste Water Engineering
Setting out the alignments of sewers may start from

Any point
City
Tail end
Out-fall

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MORE MCQ ON Waste Water Engineering

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