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Environmental Engineering in CE

Environmental Engineering in CE
Death may occur, when SO₂ concentration in atmospheric air exceeds __________ ppm.

200
400
100
20

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Environmental Engineering in CE
Which of the following is not a natural source of air pollution?

Biological decay of vegetable matter
Photochemical oxidation of organic matter
Volcanic eruptions and lightening discharges
None of these

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Environmental Engineering in CE
Global warming may result in

Decrease in food productivity
Flood
Cyclone
All of these

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Environmental Engineering in CE
Which of the following is the most active zone of atmosphere in which weathering events like rain, storm & lightning occur?

Stratosphere
Troposphere
None of these
Thermosphere

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Environmental Engineering in CE
Presence of carbon monoxide in atmosphere produced by decomposition of chlorophyl and haemoglobin breakdown of some animals, beyond TLV (>50 ppm)

Inhances the green house effect
Acts as a green house gas thereby raising earth's temperature
Causes asphyxia
Causes increase in sea level

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Environmental Engineering in CE
The progressive warming up of the earth's surface is mainly due to the

Thickening of ozone layer
Blanketing effect of CO₂ in the atmosphere
Automobile exhaust
De-forestation

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