Environmental Engineering in CE The weakest sound that can be heard by a person in a quiet environment is equivalent to __________ decibel. 20 5 10 1 20 5 10 1 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which is a secondary air pollutant? Sulphur dioxide Nitrogen dioxide Dust particles Photochemical smog Sulphur dioxide Nitrogen dioxide Dust particles Photochemical smog ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE TLV of ozone (O₃) and phosgene (COCl₂) in air is __________ ppm. 100 1000 25 0.1 100 1000 25 0.1 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following is not a source of ozone emission in the atmosphere? High voltage electrical equipments Xerox machines Dermatological photo-therapy equipments Refrigerators High voltage electrical equipments Xerox machines Dermatological photo-therapy equipments Refrigerators ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following is not a natural source of air pollution? Biological decay of vegetable matter Volcanic eruptions and lightening discharges None of these Photochemical oxidation of organic matter Biological decay of vegetable matter Volcanic eruptions and lightening discharges None of these Photochemical oxidation of organic matter ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE H₂S present in gaseous stream can be removed by adsorption on Silica gel Limestone powder Bog iron Active carbon Silica gel Limestone powder Bog iron Active carbon ANSWER DOWNLOAD EXAMIANS APP
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