Environmental Engineering in CE Dose of chlorine for disinfection of water is about __________ mg/litre of water. 1 0.01 0.1 0.3 1 0.01 0.1 0.3 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The maximum permissible noise level to which a man working in a chemical plant can be exposed for eight hours per day is about __________ decibels. 90 120 105 60 90 120 105 60 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE There are thirteen metals which are treated as pollutants. Which of the following metals is not a pollutant? Mercury Arsenic Lead Aluminium Mercury Arsenic Lead Aluminium ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal In sedimentation tanks equipped with mechanical scrapper By chemical coagulation In clarifiers In vacuum filter In sedimentation tanks equipped with mechanical scrapper By chemical coagulation In clarifiers In vacuum filter ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE 'Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a 'particulate'? Smoke & fumes Dust & mists Photochemical smog & soot None of these Smoke & fumes Dust & mists Photochemical smog & soot None of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Maximum allowable concentration of CO₂ in air for safe working is __________ ppm (parts per million). 50 5000 2000 1000 50 5000 2000 1000 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS