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Waste Water Engineering

Waste Water Engineering
If the peak discharge of a storm water drain (S.W. Drain) is expected to exceed 150 cumecs, the free board to be provided, is

90 cm
100 cm
50 cm
80 cm

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Waste Water Engineering
If the discharge of a sewer running half is 628 1.p.s., i = 0.001, and n = 0.010, the diameter of the sewer, is

1.59 m
1.49 m
1.69 m
1.39 m

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Waste Water Engineering
The detention period for plain sedimentation water tanks, is usually

24 to 36 hours
16 to 24 hours
8 to 16 hours
4 to 8 hours

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Waste Water Engineering
Dried sewage after treatment is used as

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

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

Typhoid
Cholera
Dysentery
All listed here

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

25 litres
15 litres
10 litres
20 litres

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