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Environmental Engineering in CE

Environmental Engineering in CE
Which of the following is a green house gas other than CO₂ ?

All of these
Nitrous oxide
Methane
Chlorofluro carbons (CFC)

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Environmental Engineering in CE
Carbon monoxide is a pollutant, which causes

Respiratory disease (e.g. asthma)
Asphyxiation (suffocation) leading to death
Retardation in crop growth
Damage to building materials like marble

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Environmental Engineering in CE
Presence of iron and manganese in water causes

None of these
Discoloration of bathroom fixtures
Temporary hardness
Reduction in its dissolved oxygen content

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Environmental Engineering in CE
Oil and grease present in an emulsified state in waste water discharged from industries can be removed by

Settling out using chemical reagents
Skimming off
Biological oxidation
Chlorination

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

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

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Environmental Engineering in CE
Limestone powder is injected during pulverised coal burning in boilers to __________ the flue gases.

Catalytically convert SO₂ to SO₃ in
Increase the dew point of
Reduce SO₂ content in
None of these

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