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Environmental Engineering in CE

Environmental Engineering in CE
5-200 μm size particles are called

Colloids or aerosols
Powder
Dust
Smoke

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Environmental Engineering in CE
Exposure to small amount of __________ results in high blood pressure & heart disease in human beings.

Mercury
Asbestos
Cadmium
Hydrogen sulphide

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Environmental Engineering in CE
Brown spots in fabrics will be caused by washing with water containing large amount of .

Iron
Zinc
Bromine
Iodine

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Environmental Engineering in CE
Iron & manganese present as pollutant in water can not be removed by

Oxidation followed by settling & filtration
Chlorination
Ion exchange process
Lime soda process or manganese zeolite process

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

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

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Environmental Engineering in CE
Main pollutant present in automobile exhaust is

CO₂
Hydrocarbons
NO
CO

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