Environmental Engineering in CE Which of the following is not a natural source of air pollution? Biological decay of vegetable matter Photochemical oxidation of organic matter None of these Volcanic eruptions and lightening discharges Biological decay of vegetable matter Photochemical oxidation of organic matter None of these Volcanic eruptions and lightening discharges ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE High noise level in a chemical plant can be controlled by the Path control of noise All of these Protection of operating personnel Suppression of noise at the source itself Path control of noise All of these Protection of operating personnel Suppression of noise at the source itself ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE In water treatment, alum[Al2(SO₄)3] is used for the process of Filtration Sedimentation Coagulation Disinfection Filtration Sedimentation Coagulation Disinfection ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N₂ in contaminated air at which it acts as a natural asphyxant is ≥ __________ percent. 88 92 84 80 88 92 84 80 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following causes death by asphyxiation, if its presence in atmospheric air exceeds maximum allowable concentration (i.e. > 50 ppm)? Benzopyrene Carbon monoxide Peroxyacyl nitrate Sulphur dioxide Benzopyrene Carbon monoxide Peroxyacyl nitrate Sulphur dioxide ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Corrosion in boilers can be prevented by Deaeration of feed water Feeding sodium sulphite or hydrazine phosphate to the boilers, which combines with oxygen and prevents corrosion Enhancing pH of feed water by adding alkali All of these Deaeration of feed water Feeding sodium sulphite or hydrazine phosphate to the boilers, which combines with oxygen and prevents corrosion Enhancing pH of feed water by adding alkali All of these ANSWER DOWNLOAD EXAMIANS APP
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