Environmental Engineering in CE Fluorosis (a bone disease) is caused by the presence of high concentration of __________ in atmospheric air. Nitrogen dioxide Hydrogen sulphides Hydrocarbons Hydrogen flouride Nitrogen dioxide Hydrogen sulphides Hydrocarbons Hydrogen flouride 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 (iv) (ii) and (iii) (i) and (ii) (ii) and (iv) (i) and (iv) (ii) and (iii) (i) and (ii) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE TLV of ozone (O₃) and phosgene (COCl₂) in air is __________ ppm. 0.1 25 100 1000 0.1 25 100 1000 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Infective bacteria in water is killed by the __________ process. None of these Sterilisation Disinfection Aeration None of these Sterilisation Disinfection Aeration ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The destruction of water-borne pathogens is termed as disinfection of water. Which of the following is a water disinfectant? Alkyl benzene sulphonate (ABS) Benzene hexachloride Alkalis Chlorine Alkyl benzene sulphonate (ABS) Benzene hexachloride Alkalis Chlorine ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in Food industry Municipal sewage treatment Iron & steel plant Petroleum refinery Food industry Municipal sewage treatment Iron & steel plant Petroleum refinery ANSWER DOWNLOAD EXAMIANS APP
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