Environmental Engineering in CE Presence of __________ in water stream are deleterious to aquatic life. All of these Heavy metals and cynides Suspended solids Soluble and toxic organics All of these Heavy metals and cynides Suspended solids Soluble and toxic organics 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 Oxidation of carbonaceous matter to CO₂ Nitrification or oxidation of ammonia derived from breakdown of nitrogeneous organic matter to the nitrite and eventually to the nitrate All of these Coagulation and flocculation of colloids Oxidation of carbonaceous matter to CO₂ Nitrification or oxidation of ammonia derived from breakdown of nitrogeneous organic matter to the nitrite and eventually to the nitrate All of these Coagulation and flocculation of colloids ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of Ozone and iodine Ultraviolet light for irradiation of water All of these Chlorine or its compounds Ozone and iodine Ultraviolet light for irradiation of water All of these Chlorine or its compounds ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Lagoons used for purification of polluted water All of these Use micro-organisms/bacteria in presence of dissolved oxygen Gives an excellent final effluent (with 3 to 4 lagoons arranged in series) having suspended solid < 1 mg/litre and BOD = 3.8 mg/litre Are large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds All of these Use micro-organisms/bacteria in presence of dissolved oxygen Gives an excellent final effluent (with 3 to 4 lagoons arranged in series) having suspended solid < 1 mg/litre and BOD = 3.8 mg/litre Are large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Fluorosis (a bone disease) is caused by the presence of high concentration of __________ in atmospheric air. Hydrogen flouride Nitrogen dioxide Hydrocarbons Hydrogen sulphides Hydrogen flouride Nitrogen dioxide Hydrocarbons Hydrogen sulphides ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE When the concentration of SO₂ in air is greater than __________ ppm, it gives a pungent smell. 0.1 4 0.01 1 0.1 4 0.01 1 ANSWER DOWNLOAD EXAMIANS APP
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