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Environmental Engineering in CE

Environmental Engineering in CE
Beyond what concentration of H₂S in air, acute danger to human life exists?

100 ppm
300 ppm
50 ppm
700 ppm

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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)

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

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Environmental Engineering in CE
Which of the following is an adsorbant used for the removal of SO₂ from gas/air?

Limestone powder or alkalised alumina
Bog iron
Silica gel
Active carbon

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Environmental Engineering in CE
What is the major constituents of waste/polluted water discharged from textile, pulp & paper, tanning, distillary, dairy and meat packing industries?

Inorganic pollutants
Radioactive substances
Natural organic products
None of these

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Environmental Engineering in CE
Higher concentration of nitrogen dioxide in atmospheric air causes

Cancer
Asphyxiation
Corrosion
Bronchitis

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Environmental Engineering in CE
Photochemical smog is formed from automobile exhaust

All of these
Appears only on sunny days
Is harmful for crops and trees also besides causing eye irritation & asthma
By reaction of hydrocarbon & nitric oxide in presence of sunlight

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