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Environmental Engineering in CE

Environmental Engineering in CE
Aerosols present in atmospheric air may be

Positively charged
Negatively charged
Combination of all A, B & C
Neutral

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Environmental Engineering in CE
Fluorosis is caused due to the presence of excessive amount of __________ in drinking water.

Arsenic
Mercury
Lead
Fluoride

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Environmental Engineering in CE
Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in

Petroleum refinery
Municipal sewage treatment
Food industry
Iron & steel plant

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Environmental Engineering in CE
Death may occur, when SO₂ concentration in atmospheric air exceeds __________ ppm.

100
20
400
200

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Environmental Engineering in CE
Exposure to chemicals having carcinogenic properties cause

Dermatitis (skin disorder)
Cancer
Asthma
Asphyxiation (suffocation)

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Environmental Engineering in CE
Which of the following is an adsorbant for removal of nitrogen oxides from gas/air?

Bog iron (iron oxide)
Silica gel
Pulverised limestone
Active carbon

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