Environmental Engineering in CE Which is the most practical and economical method for removal of suspended solid matter from polluted water? Sedimentation Skimming off Biological oxidation Chlorination Sedimentation Skimming off Biological oxidation Chlorination ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Tolerable limit of nitrogen oxides in air is __________ ppm. 25 0.1 5 1 25 0.1 5 1 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 Diluted with fresh water to reduce its acidity Left as such without any treatment Neutralised by alkali treatment None of these Diluted with fresh water to reduce its acidity Left as such without any treatment Neutralised by alkali treatment None of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Maximum permissible turbidity in potable water is __________ ppm. 1 10 250 1000 1 10 250 1000 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Replenishment of dissolved oxygen in water stream polluted with industrial waste occurs by Both A & B Neither A nor B Photosynthetic action of algae Natural aeration of water stream Both A & B Neither A nor B Photosynthetic action of algae Natural aeration of water stream ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE TLV of ammonia, nitrogen dioxide and phenol vapor in air is __________ ppm. 5 100 2000 1000 5 100 2000 1000 ANSWER DOWNLOAD EXAMIANS APP
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