Environmental Engineering in CE The ratio of oxygen available to the oxygen required for stabilisation of sewage is called the Biological oxygen demand (BOD) Relative stability Bacterial stability factor Oxygen ion concentration Biological oxygen demand (BOD) Relative stability Bacterial stability factor Oxygen ion concentration 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. 60 90 120 20 60 90 120 20 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Foul odour and bad taste of water is removed by treating with Alum Bleaching powder Activated carbon Copper sulphate Alum Bleaching powder Activated carbon Copper sulphate ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Salt content in sea water is about __________ percent. 1 0.5 10 3.5 1 0.5 10 3.5 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Presence of high concentration of ozone and smog in atmospheric air causes the Damage of electrical insulator on high tension power line Fading of dye on textiles Embrittlement & decrease of folding resistance of paper Cracking of rubber products Damage of electrical insulator on high tension power line Fading of dye on textiles Embrittlement & decrease of folding resistance of paper Cracking of rubber products 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
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