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 (i) and (iv) (i) and (ii) (ii) and (iv) (ii) and (iii) (i) and (iv) (i) and (ii) (ii) and (iv) (ii) and (iii) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The maximum permissible noise level to which a man working in a chemical plant can be exposed for eight hours per day is about __________ decibels. 105 90 120 60 105 90 120 60 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Pollution by particulate matter emission in the atmosphere does not take place during metal Grinding Machining Polishing Cutting Grinding Machining Polishing Cutting ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Replenishment of dissolved oxygen in water stream polluted with industrial waste occurs by Neither A nor B Both A & B Photosynthetic action of algae Natural aeration of water stream Neither A nor B Both A & B Photosynthetic action of algae Natural aeration of water stream ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Operating principle of cyclone separator is based on the action of __________ dust particles. Diffusion of Centrifugal force on Electrostatic force on Gravitational force on Diffusion of Centrifugal force on Electrostatic force on Gravitational force on ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Presence of non-biodegradable substances, like alkyl benzene sulphonate (ABS) from the detergents in polluted water stream causes Explosion hazards Fire hazards Depletion of dissolved oxygen Persistent foam Explosion hazards Fire hazards Depletion of dissolved oxygen Persistent foam ANSWER DOWNLOAD EXAMIANS APP
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