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Environmental Engineering in CE

Environmental Engineering in CE
The pH value of potable water should be between

13 to 14
4 to 5
1 to 1.5
6.5 to 8

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

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

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Environmental Engineering in CE
Peroxyacyl nitrate (PAN), a pollutant is found in the

Exhaust of sulphuric acid plant
Automobile exhaust
Flue gas of coal based power plant
Exhaust of nitric acid plant

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Environmental Engineering in CE
High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes

Reduced crop yield
Respiratory disease (e.g., asthma)
Silicosis
Cancer

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Environmental Engineering in CE
Direct reaction of unsaturated hydrocarbons with either NO or NO₂ produces an eye irritating pollutant compound known as

Photochemical smog
Benzopyrene
Peroxy acetyl nitrate (PAN) or methyl nitrile
Poly acrylonitrile

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Environmental Engineering in CE
Acute danger to human life (i.e. death) exists, if the concentration of CO₂ in atmospheric air exceeds __________ percent (by volume).

3
7
1
20

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