Environmental Engineering in CE BOD of raw municipal sewage may be in the range of about __________ mg/litre. 5-10 2000-3000 150-300 1-2 5-10 2000-3000 150-300 1-2 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE In sewage treatment, its sedimentation is speeded up by commonly adding Sodium sulphate Hydrochloric acid Copper sulphate Lime Sodium sulphate Hydrochloric acid Copper sulphate Lime ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Fluorosis (a bone disease) is caused by the presence of high concentration of __________ in atmospheric air. Nitrogen dioxide Hydrocarbons Hydrogen flouride Hydrogen sulphides Nitrogen dioxide Hydrocarbons Hydrogen flouride Hydrogen sulphides ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth's atmosphere, which absorbs it. Hydrogen Carbon dioxide None of these Ozone Hydrogen Carbon dioxide None of these Ozone ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE A shallow pond in which the sewage is retained and biologically treated is called Skimming tank Oxidation Imhoff tank Lagoon Skimming tank Oxidation Imhoff tank Lagoon ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE A masonry structure built below ground level, where biochemical reaction takes place due to anaerobic bacteria is called Skimming mill Lagoon Septic tank Cesspool Skimming mill Lagoon Septic tank Cesspool ANSWER DOWNLOAD EXAMIANS APP
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