Chemical Environmental Engineering — Test 1
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Question 1
There are thirteen metals which are treated as pollutants. Which of the following metals is not a pollutant ?
Question 2
On prolonged exposure to high concentration of carbon monoxide (> 5000 ppm), man dies because __________________?
Question 3
In water treatment plant, zeolite process is used to remove the _____________ of water?
Question 4
Disinfection of water is done to remove ______________________?
Question 5
Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about _______________ decibels?
Question 6
The average thickness of ozone layer in stratosphere is about _______________ dobson unit (DU)?
Question 7
CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing ________________ molecules of ozone?
Question 8
The upper layer of atmosphere is called the ____________________?
Question 9
The term Biological Oxygen Demand (BOD) is used in relation to ______________________?
Question 10
Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate ?