Home ยป 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. Air Pollution MCQs 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. December 29, 2021 7 Views Q. 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. 6090105120 Answer: Option 2
Which one of the following pollutant (or) pairs of pollutants is formed due to photochemical reactions?
The particulate which is emitted by combustion of petroleum in automobiles and which affects hemoglobin formation is