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Environmental Engineering in CE

Environmental Engineering in CE
Arsenic pollutant is not generated in____industries.

Glass & ceramic
Beverages
Any of these
Tanneries

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Environmental Engineering in CE
Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of

Ultraviolet light for irradiation of water
Chlorine or its compounds
Ozone and iodine
All of these

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Environmental Engineering in CE
Removal of __________ is accomplished by aeration of water.

Dissolved solids
Suspended solids
Dissolved gases
None of these

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Environmental Engineering in CE
The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the

Ionosphere
None of these
Troposphere
Stratosphere

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Environmental Engineering in CE
Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the

Forestation
Vegetation
Rain
Green house effect

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Environmental Engineering in CE
Permissible safe limit (TLV) of __________ toxic gas is 100-1000 parts per million (ppm).

Very extremely
Highly
Extremely
Moderately

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