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Waste Water Engineering

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

1.25 D
1.5 D
1.75 D
1.15 D

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Waste Water Engineering
In sewers designed with self cleansing velocity,

The bottom is silted
Neither silting nor scouring occurs at the bottom
The bottom is scoured
Both silting and scouring occur at the bottom

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Waste Water Engineering
Which one of the following gases is most significant as air pollutant?

Carbondioxide
Sulphur-dioxide
Nitrogen
Oxygen

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Waste Water Engineering
House connections to the laterals is generally made by

Cast iron
Glazed stonewares
R.C.C.
P.C.C.

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Waste Water Engineering
If the pH value of sewage is 7

None of these
It is alkaline
It is neutral
It is acidic

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Waste Water Engineering
For sewer mains of 0.5 to 1 m diameter, the ratio of maximum daily sewage flow to the average daily sewage flow is assumed

3
2.5
1.5
2

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