Question: Tolerable limit of nitrogen oxides in air is __________ ppm.
Options
A : 0.1
B : 1
C : 5
D : 25
Environmental Engineering - Part 1 more questions
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Maximum allowable concentration of CO 2 in air for safe....
Iron & manganese present as pollutant in water can not....
In water chemical treatment plant, use of chloramines ensures
Which of the following is the common pollutant emitted from....
During which of the following operating conditions of an automobile,....
H 2 S present in gaseous stream can be removed....
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