Environmental Engineering in CE Noise level heard at a distance of about 100 metres from a jet engine with after burner is about __________ decibels. 140 170 120 200 140 170 120 200 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The biological decomposition of organic substances in wastes controlled conditions is called Biological oxidation None of these Composting Incineration Biological oxidation None of these Composting Incineration ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE H₂S present in gaseous stream can be removed by adsorption on Bog iron Active carbon Limestone powder Silica gel Bog iron Active carbon Limestone powder Silica gel ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm. 10000 to 100000 1000 to 2000 3000 to 6000 6000 to 9000 10000 to 100000 1000 to 2000 3000 to 6000 6000 to 9000 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 Oxidation of carbonaceous matter to CO₂ Coagulation and flocculation of colloids Nitrification or oxidation of ammonia derived from breakdown of nitrogeneous organic matter to the nitrite and eventually to the nitrate All of these Oxidation of carbonaceous matter to CO₂ Coagulation and flocculation of colloids Nitrification or oxidation of ammonia derived from breakdown of nitrogeneous organic matter to the nitrite and eventually to the nitrate ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following is the common pollutant emitted from metallurgical smelters, thermal power plant and cement plants? F Hg SO₂ NOx F Hg SO₂ NOx ANSWER DOWNLOAD EXAMIANS APP
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