Chemical Engineering :: Environmental Engineering
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Foul odour and bad taste of water is removed by treating with
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Presence of __________ in water stream are deleterious to aquatic life.
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Acute danger to human life (i.e. death) exists, if the concentration of CO2 in atmospheric air exceeds __________ percent (by volume).
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Methyl iso-cynate (MIC) gas (TLV <1 ppm), which caused Bhopal gas tragedy in 1984 falls under the category of __________ toxic gas.
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Noise level heard inside a bus in busy city traffic or inside a sub-way train corresponds to about __________ decibels.
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Presence of volatile compounds like gasoline, oil, alcohol, ether etc. in municipal sewers may cause
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Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan
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Presence of soluble organics in polluted water causes
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Which of the following pollutants, if present in atmosphere is detectable by its odour ?
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Exposure to chemicals having carcinogenic properties cause
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