Environmental Engineering in CE Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about __________ ppm (parts per million). 4.8 0.2 0.002 1.2 4.8 0.2 0.002 1.2 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 Diluted with fresh water to reduce its acidity Neutralised by alkali treatment Left as such without any treatment None of these Diluted with fresh water to reduce its acidity Neutralised by alkali treatment Left as such without any treatment ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing __________ molecules of ozones. 10⁵ 10² 10¹⁵ 10⁹ 10⁵ 10² 10¹⁵ 10⁹ ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following is not a natural source of air pollution? Volcanic eruptions and lightening discharges Biological decay of vegetable matter None of these Photochemical oxidation of organic matter Volcanic eruptions and lightening discharges Biological decay of vegetable matter None of these Photochemical oxidation of organic matter ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Inhalation of lead compounds present in automobile exhaust (using leaded petrol) causes Anaemia Nervous system disorder All of these Blood poisoning Anaemia Nervous system disorder All of these Blood poisoning ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Reingleman chart No. 2 corresponds to __________ percent black smoke. 80 10 20 40 80 10 20 40 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS