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Environmental Engineering in CE

Environmental Engineering in CE
Infective bacteria in water is killed by the __________ process.

None of these
Aeration
Disinfection
Sterilisation

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Environmental Engineering in CE
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)

90
750
800
10

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Environmental Engineering in CE
Which of the following processes is involved in the biochemical treatment of sewage effluents?

Fermentation
Dehydration
Oxidation
Reduction

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Environmental Engineering in CE
Which of the following is the most severe air pollutant?

CO
Hydrocarbons
SO₂
NOx

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Environmental Engineering in CE
Inhalation of lead compounds present in the automobile exhausts (using leaded petrol) causes

All of these
Blood poisoning
Nervous system disorder
Anaemia

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Environmental Engineering in CE
'Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a 'particulate'?

None of these
Photochemical smog & soot
Smoke & fumes
Dust & mists

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