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Chemical Engineering - Environmental Engineering

Exercise : Environmental Engineering - Section 3
11.
Coal mines drainage waste water (acidic in nature) results from the earth's water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is
neutralised by alkali treatment.
left as such without any treatment.
diluted with fresh water to reduce its acidity.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
Fine grit present in sewage is removed in the __________ during sewage treatment.
grit chamber
detritus tank
trickling filter
skimming tank.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
The lowest layer of atmosphere is known as the
stratosphere
troposphere
ionosphere
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is __________ μg/m3.(μg-microgram)
10
90
800
750
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
Which of the following is not a weightless pollutant ?
SPM
Thermal pollution
Radioactive rays
Noise pollution
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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