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Environmental Engineering

Environmental Engineering
If Biochemical oxygen demand (BOD) of a town is 20000 kg/day and BOD per capita per day is 0.05 kg, then population equivalent of town is

4,00,000
1000
1,00,000
4000

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Environmental Engineering
For satisfactory working of a sludge digestion unit, the pH range of digested sludge should be maintained as

4.5 to 6.0
8.5 to 10.0
10.5 to 12.0
6.5 to 8.0

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Environmental Engineering
The gas from sludge digestion tank is mainly composed of

Nitrogen
Carbon dioxide
Methane
Hydrogen sulphide

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Environmental Engineering
The type of valve which is provided to control the flow of water in the distribution system at street corners and where the pipe lines intersect is

Check valve
Safety valve
Sluice valve
Scour valve

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Environmental Engineering
Select the correct relationship between porosity (N), specific yield (y) and specific retention (R)

y = N + R
R > (N + y)
N = y + R
R = N + y

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Environmental Engineering
Facultative bacteria are able to work in

Presence as well as in absence of oxygen
Presence of oxygen only
Presence of water
Absence of oxygen only

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MORE MCQ ON Environmental Engineering

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