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Chemical Engineering - Environmental Engineering

Exercise : Environmental Engineering - Section 1
6.
Maximum allowable concentration of CO2 in air for safe working is __________ ppm (parts per million).
50
1000
2000
5000
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
Tolerable limit of nitrogen oxides in air is __________ ppm.
0.1
1
5
25
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
Iron & manganese present as pollutant in water can not be removed by
ion exchange process.
oxidation followed by settling & filtration.
lime soda process or manganese zeolite process.
chlorination.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
In water chemical treatment plant, use of chloramines ensures
disinfection.
taste & odour control.
weed control in reservoirs.
removal of permanent hardness.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
Which of the following is the common pollutant emitted from metallurgical smelters, thermal power plant and cement plants ?
NOx
Hg
SO2
F
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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