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Waste Water Engineering

Waste Water Engineering
The gradient of sewers depends upon

Velocity of flow
Discharge
All listed here
Diameter of the sewer

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Waste Water Engineering
During purification process of sewage the gas given off, is

Hydrogen
Carbon dioxide
All listed here
Ammonia

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Waste Water Engineering
Ventilating shafts are provided to a sewer line at every

200 m
150 m
300 m
100 m

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Waste Water Engineering
The normal value of over flow rates for plain primary sedimentation tanks, ranges between

40,000 to 50,000 litres/sqm/day
80,000 to 100,000 litres/sqm/day
50,000 to 60,000 litres/sqm/day
25,000 to 35,000 litres/sqm/day

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Waste Water Engineering
In olden days the type of section adopted in trunk and out fall sewers was

Egg shaped
Horse shoe shaped
Circular shaped
Parabolic shaped

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Waste Water Engineering
If is the diameter of upper circular portion, the overall depth of a standard egg shaped section, is

1.25 D
1.75 D
1.5 D
1.15 D

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