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Environmental Engineering in CE

Environmental Engineering in CE
Which of the following pollutants, if present in atmosphere is detectable by its odour?

CO₂
NO₂
SO₂
CO

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Environmental Engineering in CE
Presence of __________ in water stream are deleterious to aquatic life.

All of these
Heavy metals and cynides
Suspended solids
Soluble and toxic organics

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Environmental Engineering in CE
In troposphere (the weather domain), the temperature 't' at height 'h' above the spa level in metres is given by (where, temperature at sea level is 15°C and t is in °C.)

t = 15 - 0.0065h
t = 15 + 0.0065h
t = 0.0035h -15
t = 15 - 0.0035h

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Environmental Engineering in CE
Biological oxidation ponds remove organic matters present in the polluted water by

Aerobic oxidation
Using the activities of bacteria and other micro organisms
Neither A nor B
Both A & B

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Environmental Engineering in CE
Ozone is

Both B & C
A secondary pollutant
Impervious to ultra-violet rays
A primary pollutant

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Environmental Engineering in CE
Presence of soluble organics in polluted water causes

Depletion of oxygen
Undesirable plants growth
Explosion hazards
Fire hazards

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