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Environmental Engineering in CE

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

Disinfection
None of these
Sterilisation
Aeration

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Environmental Engineering in CE
Which of the following pollutants is absent in the emissions from a fertiliser plant ?

NO₂
CO
NH₃
SO₂ & SO₃

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Environmental Engineering in CE
Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of

CFC (chloro fluoro carbon)
CO₂
SO₂
Hydrocarbons

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Environmental Engineering in CE
Which of the following is not a source of ozone emission in the atmosphere?

High voltage electrical equipments
Dermatological photo-therapy equipments
Refrigerators
Xerox machines

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Environmental Engineering in CE
Tolerable limit of nitrogen oxides in air is __________ ppm.

1
0.1
25
5

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

All of these
Anaemia
Blood poisoning
Nervous system disorder

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