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Waste Water Engineering

Waste Water Engineering
For a grit chamber, if the recommended velocity of flow is 0.2 m/sec and detention period is 2 minutes, the length of the tank, is

20 m
30 m
24 m
16 m

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Waste Water Engineering
A sewer running partially full and hurried with back filled, fails in compression due to

Weight of the back fill
Weight of the pipe
Superimposed traffic loads
All listed here

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

10 litres
25 litres
20 litres
15 litres

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Waste Water Engineering
The arrangement made for passing the sewer line below an obstruction below the hydraulic gradient lines called

Depressed sewer
all of these
Sag pipe
Inverted syphon

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Waste Water Engineering
If the length of overland flow from the critical point to the mouth of drain is 13.58 km and difference in level between the critical point and drain mouth is 10 m, the inlet time is

2 hours
4 hours
6 hours
8 hours

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Waste Water Engineering
Depletion of ozone layer in the outer atmosphere may cause

Bronchitis
Lung cancer
Skin cancer
Heart disorder

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