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Waste Water Engineering

Waste Water Engineering
The ratio of the diameter of a circular section and the side of a square section hydraulically equivalent, is

1.075
1.065
1.085
1.095

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Waste Water Engineering
5 days-biochemical oxygen demand (BOD5) is taken at a temperature of

25°C
15°C
0°C
20°C

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Waste Water Engineering
depends upon The Chezy’s constant C in the formula V = C

Shape of the sewer
Roughness of sewer surface
Size of the sewer
All listed here

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Waste Water Engineering
The density of population over 40 hectares is 250/hectare. If water supply demand per day is 200 litres and sewage discharge is 80% of water supply, the sewage flow in sewers of separate system, is

0.05552 cumec
0.05554 cumec
0.05556 cumec
0.0556 cumec

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Waste Water Engineering
Before discharging the foul sewage into rivers, it is generally treated by

All listed here
Oxidation
Sedimentation
Screening

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Waste Water Engineering
If D is the diameter of a circular sewer and D’ is the top horizontal diameter of an equivalent egg shaped section, the relationship which holds good, is

D’ = 0.84 D
D’ = 0.64 D
D’ = 0.74 D
D’ = 0.94 D

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