Environmental Engineering in CE What are the methods of treatment & disposal of radioactive wastes? All of these Biological methods & adsorption in ion exchange materials Fixing into a solid mass with cement and sinking deep in the sea Evaporation & chemical precipitation All of these Biological methods & adsorption in ion exchange materials Fixing into a solid mass with cement and sinking deep in the sea Evaporation & chemical precipitation ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE As compared to rapid sand filters, slow sand filters give(i) Slower filtration rate(ii) Higher filtration rate(iii) Lesser efficiency in removal of bacteria(iv) Higher efficiency in removal of bacteriaThe correct answer is (ii) and (iii) (ii) and (iv) (i) and (ii) (i) and (iv) (ii) and (iii) (ii) and (iv) (i) and (ii) (i) and (iv) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Coal mines drainage waste water (acidic in nature) results from the earth's water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is None of these Neutralised by alkali treatment Diluted with fresh water to reduce its acidity Left as such without any treatment None of these Neutralised by alkali treatment Diluted with fresh water to reduce its acidity Left as such without any treatment ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Foul odour and bad taste of water is removed by treating with Alum Copper sulphate Bleaching powder Activated carbon Alum Copper sulphate Bleaching powder Activated carbon 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 None of these Ionosphere Stratosphere Troposphere None of these Ionosphere Stratosphere Troposphere ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The type of bacteria which is active in trickling filter during biological treatment of sewage is the __________ bacteria. Aerobic Saphrophytic Parasitic Anaerobic Aerobic Saphrophytic Parasitic Anaerobic ANSWER DOWNLOAD EXAMIANS APP
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