Environmental Engineering in CE Iron & manganese present in the polluted water is removed by Chlorination only Oxidation followed by settling & filtration Chemical coagulation Simple filtration Chlorination only Oxidation followed by settling & filtration Chemical coagulation Simple filtration 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? Alkalis Benzene hexachloride Chlorine Alkyl benzene sulphonate (ABS) Alkalis Benzene hexachloride Chlorine Alkyl benzene sulphonate (ABS) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Replenishment of dissolved oxygen in water stream polluted with industrial waste occurs by Natural aeration of water stream Photosynthetic action of algae Both A & B Neither A nor B Natural aeration of water stream Photosynthetic action of algae Both A & B Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following pollutants is absent in the emissions from a fertiliser plant ? SO₂ & SO₃ CO NO₂ NH₃ SO₂ & SO₃ CO NO₂ NH₃ 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 Maximum allowable concentration of CO₂ in air for safe working is __________ ppm (parts per million). 2000 50 5000 1000 2000 50 5000 1000 ANSWER DOWNLOAD EXAMIANS APP
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