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Waste Water Engineering

Waste Water Engineering
If the diameter of a sewer is 100 mm, the gradient required for generating self cleansing velocity is

None of these
1 in 120
1 in 60
1 in 100

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Waste Water Engineering
Lead acetate test in sewer manhole is done to test the presence of

Diesel vapours
Methane gas
Carbondioxide gas
Hydrogen sulphide

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Waste Water Engineering
The sewer pipe which carries sewage from a building for immediate disposal is

Intercepting sewer
Lateral sewer
Main sewer
House sewer

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Waste Water Engineering
15 cumecs, the depth d and width are related by For drains up to

B = 0.5 d
d = 0.5 B
B = 0.2 d
d = 0.2 B

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Waste Water Engineering
A nuisance is experienced in diluting water if dilution factor is less than

40
20
100
60

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Waste Water Engineering
In a trickling filter

Filtration process is used
Biological action is used
Both A and B
Neither A nor B

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