Environmental Engineering in CE Presence of __________ hardness is responsible for the temporary hardness in water. Sulphate Calcium Carbonate Choride Sulphate Calcium Carbonate Choride 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 Left as such without any treatment None of these Diluted with fresh water to reduce its acidity Neutralised by alkali treatment Left as such without any treatment None of these Diluted with fresh water to reduce its acidity Neutralised by alkali treatment ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The biological decomposition of organic substances in wastes controlled conditions is called Incineration Composting Biological oxidation None of these Incineration Composting Biological oxidation None of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The maximum permissible noise level to which a man working in a chemical plant can be exposed for eight hours per day is about __________ decibels. 60 105 90 120 60 105 90 120 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Maximum permissible residual chlorine in treated water should be __________ mg/litre. 5 to 10 02 to 0.3 0.001 to 0.01 2 to 3 5 to 10 02 to 0.3 0.001 to 0.01 2 to 3 ANSWER DOWNLOAD EXAMIANS APP
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 None of these Natural organic products Inorganic pollutants Radioactive substances None of these Natural organic products ANSWER DOWNLOAD EXAMIANS APP
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