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Chemical Engineering - Environmental Engineering

Exercise : Environmental Engineering - Section 4
6.
Death may occur, when SO2 concentration in atmospheric air exceeds __________ ppm.
20
100
400
200
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
Which of the following acts as a natural source of air pollution ?
Forest fire
Deforestation
Volcanic eruption
None of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
Higher concentration of CO2 in atmosphere
allows visible solar radiation (ultraviolet) of short wave-length to pass through.
reflects and absorbs the longer wavelength (infra-red) radiations.
prevents solar heat being radiated out completely, resulting in 'heat trap' i.e., global warming.
all (a), (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
Permissible safe limit (TLV) of __________ toxic gas is 100-1000 parts per million (ppm).
highly
moderately
extremely
very extremely
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
Radioactive substances present in the polluted water stream can be removed by
biological oxygen treatment.
coagulation and filtration.
adsorption in ion exchange materials.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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