Environmental Engineering in CE Hydrogen ion concentration in distilled water is 10⁻⁷ 7 x 10⁻⁷ 10⁷ 7 x 10⁷ 10⁻⁷ 7 x 10⁻⁷ 10⁷ 7 x 10⁷ 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. Remains constant Increases Decreases May increase or decrease ; depends on the chemical characteristics of polluted water Remains constant Increases Decreases May increase or decrease ; depends on the chemical characteristics of polluted water ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The pH value of potable water should be between 1 to 1.5 13 to 14 6.5 to 8 4 to 5 1 to 1.5 13 to 14 6.5 to 8 4 to 5 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Shouting by a man at his full voice corresponds to a voice level of about __________ decibels. 80 25 50 120 80 25 50 120 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following air pollutants is not toxic to vegetation i.e., doesn't cause vegetation damage? Smog & ozone Sulphur dioxide & spray of weed killers Carbon monoxide Hydrogen fluoride & nitrogen oxides Smog & ozone Sulphur dioxide & spray of weed killers Carbon monoxide Hydrogen fluoride & nitrogen oxides ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Iron & manganese present as pollutant in water can not be removed by Ion exchange process Lime soda process or manganese zeolite process Oxidation followed by settling & filtration Chlorination Ion exchange process Lime soda process or manganese zeolite process Oxidation followed by settling & filtration Chlorination ANSWER DOWNLOAD EXAMIANS APP
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