Environmental Engineering in CE Presence of soluble organics in polluted water causes Undesirable plants growth Fire hazards Depletion of oxygen Explosion hazards Undesirable plants growth Fire hazards Depletion of oxygen Explosion hazards ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about __________ ppm (parts per million). 0.002 4.8 0.2 1.2 0.002 4.8 0.2 1.2 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE __________ substances present in sewage are removed in grit chamber during sewage treatment. Fatty Inorganic Dissolved Organic Fatty Inorganic Dissolved Organic ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following sources is responsible for maximum air pollution? Photochemical oxidation of organic matter Automobiles exhaust Forest fire Industrial chimney exhaust Photochemical oxidation of organic matter Automobiles exhaust Forest fire Industrial chimney exhaust ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Lagoons used for purification of polluted water 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 All of these Are large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds 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 All of these Are large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds Use micro-organisms/bacteria in presence of dissolved oxygen ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The main pollutant in waste water discharged from a petroleum refinery is oil (both in free and emulsified form). Free oil is removed by Biological oxygen pond Aerated lagoons Trickling filters Gravity separator having oil skimming devices Biological oxygen pond Aerated lagoons Trickling filters Gravity separator having oil skimming devices ANSWER DOWNLOAD EXAMIANS APP
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