Q. 5-200 ΞΌm size particles are called
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Correct Answer: (A)
Colloids or aerosols
Environmental Engineering MCQs | Page - 2
Dear candidates you will find MCQ questions of Environmental Engineering here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
Q. 80% less than 200 mesh size particles are called
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Correct Answer: (B)
Powder
Q. A 'body' which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the
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Correct Answer: (B)
Green house
Q. A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of _________ high above earth's atmosphere, which absorbs it.
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Correct Answer: (C)
Ozone
Q. A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from _________ ppm.
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Correct Answer: (D)
10000 to 100000
Q. A man exposed to excessive noise level in the working environment may suffer from
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Correct Answer: (D)
All (A), (B) & (C)
Q. A masonry structure built below ground level, where biochemical reaction takes place due to anaerobic bacteria is called
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Correct Answer: (D)
Septic tank
Q. A shallow pond in which the sewage is retained and biologically treated is called
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Correct Answer: (A)
Oxidation
Q. A standard test for determination of hardness in water is termed as _________ test.
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Correct Answer: (A)
EDTA
Q. Acute danger to human life (i.e. death) exists, if the concentration of CO2 in atmospheric air exceeds _________ percent (by volume).
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Correct Answer: (D)
20
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