Environmental Engineering in CE Acute danger to human life (i.e. death) exists, if the concentration of CO₂ in atmospheric air exceeds __________ percent (by volume). 7 3 20 1 7 3 20 1 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The progressive warming up of the earth's surface is mainly due to the De-forestation Automobile exhaust Thickening of ozone layer Blanketing effect of CO₂ in the atmosphere De-forestation Automobile exhaust Thickening of ozone layer Blanketing effect of CO₂ in the atmosphere ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The commonest form of iron & manganese found in ground water as pollutant is in the form of their Sulphides Carbonates Bi-carbonates Chlorides Sulphides Carbonates Bi-carbonates Chlorides ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Coal mines drainage waste water (acidic in nature) results from the earth's water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is Diluted with fresh water to reduce its acidity Left as such without any treatment Neutralised by alkali treatment None of these Diluted with fresh water to reduce its acidity Left as such without any treatment Neutralised by alkali treatment None of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Noise level during normal conversation among men is about __________ decibles. 45 10 115 90 45 10 115 90 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following industries discharge mercury as a pollutant? Beverage plant Phosphoric acid plant Chloro-alkali industry Tanneries Beverage plant Phosphoric acid plant Chloro-alkali industry Tanneries ANSWER DOWNLOAD EXAMIANS APP
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