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Waste Water Engineering

Waste Water Engineering
The pH value of fresh sewage is usually

More than 7
Less than 7
Equal to zero
Equal to 7

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Waste Water Engineering
The rational formula for peak drainage discharge, was evolved by

Lloyd David
All of these
Fruhling
Kuichling

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Waste Water Engineering
If the diameter of a sewer is 150 mm, the gradient required for generating self cleansing velocity, is

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

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Waste Water Engineering
In a city the ratio of the drainage to sewage is 20, the percentage discharge passing through non-monsoon periods, is

5
20
10
15

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Waste Water Engineering
Primary treatment of sewage consists of removal of

Large suspended organic solids
Floating materials
Oil and grease
Sand and girt

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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

1.5 D
1.15 D
1.75 D
1.25 D

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