Environmental Engineering in CE Scale formation in boiler is controlled by Preheating of feed water Keeping the pH value of feed water just below 7 Reduction in hardness, silica & alumina in feed water Eliminating H₂S in feed water Preheating of feed water Keeping the pH value of feed water just below 7 Reduction in hardness, silica & alumina in feed water Eliminating H₂S in feed water ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Replenishment of dissolved oxygen in water stream polluted with industrial waste occurs by Both A & B Photosynthetic action of algae Natural aeration of water stream Neither A nor B Both A & B Photosynthetic action of algae Natural aeration of water stream Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The average thickness of ozone layer in stratosphere is about __________ dobson unit (DU). 230 20 750 1500 230 20 750 1500 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Lagooning process is mainly a means of the Biological treatment of wastes Reduction of excessive flow in sewers Sludge disposal None of these Biological treatment of wastes Reduction of excessive flow in sewers Sludge disposal None of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Tolerable limit of nitrogen oxides in air is __________ ppm. 5 0.1 25 1 5 0.1 25 1 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Direct reaction of unsaturated hydrocarbons with either NO or NO₂ produces an eye irritating pollutant compound known as Poly acrylonitrile Benzopyrene Photochemical smog Peroxy acetyl nitrate (PAN) or methyl nitrile Poly acrylonitrile Benzopyrene Photochemical smog Peroxy acetyl nitrate (PAN) or methyl nitrile ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS