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Environmental Engineering

Environmental Engineering
Generally the detention period for grit chambers is kept as

24 hours
1 minute
5 minutes
12 hours

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Environmental Engineering
The most common cause of acidity in water is

Hydrogen
Carbon dioxide
Nitrogen
Oxygen

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Environmental Engineering
Facultative bacteria are able to work in

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

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Environmental Engineering
If the sewage contains grease and fatty oils, these are removed in

Sedimentation tanks
Grit chambers
Skimming tanks
Detritus tanks

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

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

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Environmental Engineering
The pathogens can be killed by

None of these
Oxidation
Nitrification
Chlorination

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MORE MCQ ON Environmental Engineering

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