Environmental Engineering in CE Which of the following dust collection equipments is the least efficient (for sub-micronic particles)? Cyclone separator Bag filter Hollow wet scrubber Dust catcher (gravity type) Cyclone separator Bag filter Hollow wet scrubber Dust catcher (gravity type) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The average thickness of ozone layer in stratosphere is about __________ dobson unit (DU). 1500 230 750 20 1500 230 750 20 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following air pollutants is not toxic to vegetation i.e., doesn't cause vegetation damage? Carbon monoxide Hydrogen fluoride & nitrogen oxides Sulphur dioxide & spray of weed killers Smog & ozone Carbon monoxide Hydrogen fluoride & nitrogen oxides Sulphur dioxide & spray of weed killers Smog & ozone ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Polluted water having low BOD are most economically treated in Sedimentation tanks Clarifier Sludge digester Oxidation ponds Sedimentation tanks Clarifier Sludge digester Oxidation ponds ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The amount of coagulant needed for coagulation of water increases with(i) Increase in turbidity of water(ii) Decrease in turbidity of water(iii) Increase in temperature of water(iv) Decrease in temperature of waterThe correct answer is (i)and(iv) (ii) and (iv) (i) and (ii) (ii) and (iii) (i)and(iv) (ii) and (iv) (i) and (ii) (ii) and (iii) ANSWER DOWNLOAD EXAMIANS APP
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 (iv) (i) and (ii) (ii) and (iii) (i) and (iv) (ii) and (iv) (i) and (ii) (ii) and (iii) (i) and (iv) ANSWER DOWNLOAD EXAMIANS APP
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