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Environmental Engineering in CE

Environmental Engineering in CE
Water effluent generated in printing industry is decolourised by

Electrolytic decomposition
Ion exchange technique
Adsorption
Reverse osmosis

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Environmental Engineering in CE
Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes

Reduced strength of textiles
Fading of dyes on textiles
Corrosion, tarnishing & soiling of metals
All of these

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Environmental Engineering in CE
Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes

Paralysis of muscles & loss of appetite
Nervous depression
Gastritis & diarrhea
All of these

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Environmental Engineering in CE
Which of the following dust collection equipments is the least efficient (for sub-micronic particles)?

Dust catcher (gravity type)
Bag filter
Cyclone separator
Hollow wet scrubber

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Environmental Engineering in CE
Phenolic water generated in coke ovens & by-product plant of a steel plant are disposed off by

None of these
Filtration and recycling for cooling coke oven gas
Quenching of hot coke
Discharging in the river stream

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Environmental Engineering in CE
Which of the following is the most active zone of atmosphere in which weathering events like rain, storm & lightning occur?

None of these
Troposphere
Thermosphere
Stratosphere

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