Environmental Engineering in CE The concentration of water vapour in troposphere, which depends upon the altitude & temperature varies in the range of zero to __________ percent. 12 4 8 1 12 4 8 1 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated. Decreases Increases May increase or decrease ; depends on the chemical characteristics of polluted water Remains constant Decreases Increases May increase or decrease ; depends on the chemical characteristics of polluted water Remains constant ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes Fading of dyes on textiles Corrosion, tarnishing & soiling of metals All of these Reduced strength of textiles Fading of dyes on textiles Corrosion, tarnishing & soiling of metals All of these Reduced strength of textiles ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Higher concentration of CO₂ in atmosphere Allows visible solar radiation (ultraviolet) of short wave-length to pass through Prevents solar heat being radiated out completely, resulting in All of these Reflects and absorbs the longer wavelength (infra-red) radiations Allows visible solar radiation (ultraviolet) of short wave-length to pass through Prevents solar heat being radiated out completely, resulting in All of these Reflects and absorbs the longer wavelength (infra-red) radiations ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about __________ decibels. 60 20 90 120 60 20 90 120 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which is the best and the most effective method for the removal of organic contaminant present in the polluted water in very small quantity (say < 200 mg/litre)? Biological oxidation pond Lagooning Chemical coagulation Activated carbon adsorption Biological oxidation pond Lagooning Chemical coagulation Activated carbon adsorption ANSWER DOWNLOAD EXAMIANS APP
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