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? I-131 Ra-226 Sr-90 Au-198 I-131 Ra-226 Sr-90 Au-198 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following gases is having the widest explosion limit (about 2 to 81% gas in gas-air mixture), rendering it the property of the most explosive gas? Acetylene Hydrogen Ammonia Carbon monoxide Acetylene Hydrogen Ammonia Carbon monoxide ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following plants does not emit appreciable amount of SO₂ in atmosphere? Sulphuric acid plant Thermal power plant Petroleum refinery Nitric acid plant Sulphuric acid plant Thermal power plant Petroleum refinery Nitric acid plant ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The disinfection efficiency of chlorine increases by(i) Decreasing the time of contact(ii) Decreasing the temperature of water(iii) Increasing the temperature of water Both (i) and (ii) Only (iii) Only (i) Both (i) and (iii) Both (i) and (ii) Only (iii) Only (i) Both (i) and (iii) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Iron & manganese present in the polluted water is removed by Chemical coagulation Chlorination only Oxidation followed by settling & filtration Simple filtration Chemical coagulation Chlorination only Oxidation followed by settling & filtration Simple filtration ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following is a green house gas other than CO₂ ? Nitrous oxide Chlorofluro carbons (CFC) Methane All of these Nitrous oxide Chlorofluro carbons (CFC) Methane All of these ANSWER DOWNLOAD EXAMIANS APP
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