Environmental Engineering in CE The biological decomposition of organic substances in wastes controlled conditions is called Composting None of these Incineration Biological oxidation Composting None of these Incineration Biological oxidation ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following is not a natural source of air pollution? 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 Biological decay of vegetable matter Photochemical oxidation of organic matter ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following pollutants is not emitted during volcanic eruptions? Hydrocarbons SO₂ CO H₂S Hydrocarbons SO₂ CO H₂S 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. 20 90 120 60 20 90 120 60 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the Ionosphere Stratosphere Troposphere None of these Ionosphere Stratosphere Troposphere None of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Sound produced by an automobile horn heard at a distance of 1.5 metres corresponds to about __________ decibels. 90 120 180 150 90 120 180 150 ANSWER DOWNLOAD EXAMIANS APP
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