Chemical Engineering :: Environmental Engineering
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Pick out the wrong statement.
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Which of the following is not an air pollutant ?
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Presence of high concentration of ozone and smog in atmospheric air causes the
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__________ is removed from water by lime-soda process.
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Which of the following is the most major constituents of air pollutants ?
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Shouting by a man at his full voice corresponds to a voice level of about __________ decibels.
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Carbonaceous particles having size less than 1 μm are called
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__________ substances present in sewage are removed in grit chamber during sewage treatment.
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A.
Benzopyrene which causes cancer is present in traces in tobacco, charcoal & petrol driven automobile exhaust.
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B.
NO2 is capable of penetrating the troposphere and can absorb both ultraviolet & visible light.
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C.
Hydrocarbon pollutants are produced by sweet gum, oak & natural rubber trees.
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D.
H2S is not at all produced during combustion of sulphur bearing fuels as all the sulphur is oxidised to SO2.
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