Environmental Engineering in CE Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is __________ decibels. 75 35 95 105 75 35 95 105 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 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 Oxidation of carbonaceous matter to CO₂ All of these 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 Oxidation of carbonaceous matter to CO₂ ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of __________ present in it. Coal ash Ortho-xylene Potassium cyanide None of these Coal ash Ortho-xylene Potassium cyanide None of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Threshold Limit Value (TLV) is the maximum allowable concentration (i.e. safe limit) of pollutants in air. Safe limit for SO₂ in air is __________ ppm. 2000 500 5 1000 2000 500 5 1000 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Noise level during normal conversation among men is about __________ decibles. 10 115 90 45 10 115 90 45 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The earth's atmosphere is an envelope of gases present upto a height of about __________ kms. 10 2000 200 1000 10 2000 200 1000 ANSWER DOWNLOAD EXAMIANS APP
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