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Waste Water Engineering

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

Circular shaped
Parabolic shaped
Egg shaped
Horse shoe shaped

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Waste Water Engineering
Clogging of sewers, is caused due to

Low discharge
All of these
Silting
Greasy and oily matters

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Waste Water Engineering
The drainage area of a town is 12 hectares. Its 40% area is hard pavement ( K = 0.85), the 40% area is unpaved streets (K = 0.20) and the remaining is wooded areas (K = 0.15). Assuming the time of concentration for the areas as 30 minutes and using the formula Ps = 900/(t + 60) the maximum run off is

0.12 cumec
0.15 cumec
0.10 cumec
0.20 cumec

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Waste Water Engineering
For sewers, inverted siphon is provided for

Four pipes
One pipe
Two pipes
Three pipes

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Waste Water Engineering
The algae dies out in the zone of

Cleaner water
Recovery
Active decomposition
Degradation

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Waste Water Engineering
The gradient of sewers depends upon

Velocity of flow
All listed here
Discharge
Diameter of the sewer

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MORE MCQ ON Waste Water Engineering

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