Environmental Engineering in CE Acute danger to human life (i.e. death) exists, if the concentration of CO₂ in atmospheric air exceeds __________ percent (by volume). 20 1 3 7 20 1 3 7 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following radioactive wastes emits all α, β & γ rays and hence is the most hazardous of all radioactive emitters? Sr-90 Ra-226 Au-198 I-131 Sr-90 Ra-226 Au-198 I-131 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundaries causes Shortness of breath Asphyxiation (suffocation) All of these Tuberculosis Shortness of breath Asphyxiation (suffocation) All of these Tuberculosis ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following is a green house gas other than CO₂ ? Chlorofluro carbons (CFC) Nitrous oxide Methane All of these Chlorofluro carbons (CFC) Nitrous oxide Methane All of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE As compared to rapid sand filters, slow sand filters give(i) Slower filtration rate(ii) Higher filtration rate(iii) Lesser efficiency in removal of bacteria(iv) Higher efficiency in removal of bacteriaThe correct answer is (i) and (iv) (ii) and (iii) (i) and (ii) (ii) and (iv) (i) and (iv) (ii) and (iii) (i) and (ii) (ii) and (iv) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal In clarifiers In sedimentation tanks equipped with mechanical scrapper In vacuum filter By chemical coagulation In clarifiers In sedimentation tanks equipped with mechanical scrapper In vacuum filter By chemical coagulation ANSWER DOWNLOAD EXAMIANS APP
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