Environmental Engineering in CE MCQs

There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth's surface in which human being along with other organisms live is called troposphere. The rate at which air temperature in the troposphere gradually decreases with height is about __________ °C/km.

Global warming may result in

Ambient noise level can be reduced by __________ decibels by planting trees (like coconut, neem etc.) near public utility buildings (like hospitals & schools).

Pick out the one which is not a chemical coagulant.

Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes

Which of the following industries discharge mercury as a pollutant?

Which of the following is the most severe air pollutant?

Which is the most widely used coagulant for the treatment of turbid water?

Exposure to small amount of __________ results in high blood pressure & heart disease in human beings.