Environmental Engineering in CE Cleaning is done by(i) Scraping and removal in filters slow sand(ii) Back washing in slow sand filters(iii) Scraping and removal in filters rapid sand(iv) Back washing in rapid sand filtersThe correct answer is (ii) and (iii) (ii) and (iv) (i) and (iv) (i) and (ii) (ii) and (iii) (ii) and (iv) (i) and (iv) (i) and (ii) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE In sewage treatment, the detention period allowed for oxidation ponds ranges from __________ weeks. 9 to 10 4 to 5 1 to 2 15 to 20 9 to 10 4 to 5 1 to 2 15 to 20 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the Forestation Green house effect Vegetation Rain Forestation Green house effect Vegetation Rain ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Septic tank is a(i) Settling tank(ii) Digestion tank(iii) Aeration tank Only (iii) (i) and (iii) Only (i) (i) and (ii) Only (iii) (i) and (iii) Only (i) (i) and (ii) 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 Trickling filters Aerated lagoons Biological oxygen pond Gravity separator having oil skimming devices Trickling filters Aerated lagoons Biological oxygen pond Gravity separator having oil skimming devices ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes All of these Nervous depression Paralysis of muscles & loss of appetite Gastritis & diarrhea All of these Nervous depression Paralysis of muscles & loss of appetite Gastritis & diarrhea ANSWER DOWNLOAD EXAMIANS APP
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