Environmental Engineering in CE Which is the most practical and economical method for removal of suspended solid matter from polluted water? Biological oxidation Chlorination Sedimentation Skimming off Biological oxidation Chlorination Sedimentation Skimming off ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following causes death by asphyxiation, if its presence in atmospheric air exceeds maximum allowable concentration (i.e. > 50 ppm)? Peroxyacyl nitrate Carbon monoxide Sulphur dioxide Benzopyrene Peroxyacyl nitrate Carbon monoxide Sulphur dioxide Benzopyrene ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in All of these Nitrification or oxidation of ammonia derived from breakdown of nitrogeneous organic matter to the nitrite and eventually to the nitrate Oxidation of carbonaceous matter to CO₂ Coagulation and flocculation of colloids All of these Nitrification or oxidation of ammonia derived from breakdown of nitrogeneous organic matter to the nitrite and eventually to the nitrate Oxidation of carbonaceous matter to CO₂ Coagulation and flocculation of colloids ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The pH value of oxidised sewage is about 7.3 1.8 13.4 6.2 7.3 1.8 13.4 6.2 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following dust collection equipments is the least efficient (for sub-micronic particles)? Dust catcher (gravity type) Cyclone separator Bag filter Hollow wet scrubber Dust catcher (gravity type) Cyclone separator Bag filter Hollow wet scrubber ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate? CFC (chloro fluoro carbons) NOx CO SO₂ CFC (chloro fluoro carbons) NOx CO SO₂ ANSWER DOWNLOAD EXAMIANS APP
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