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Environmental Engineering in CE

Environmental Engineering in CE
Which of the following is the most widely used disinfectant in water treatment?

Irradiation of water by ultraviolet light
Cation exchanger
Chlorine
Coagulation

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Environmental Engineering in CE
Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by

Floatation & skimming
Ultrafiltration
Centrifugation
Chemical coagulation

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Environmental Engineering in CE
Which of the following is the common pollutant emitted from metallurgical smelters, thermal power plant and cement plants?

NOx
Hg
F
SO₂

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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
Discharging in the river stream
Quenching of hot coke

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Environmental Engineering in CE
The destruction of water-borne pathogens is termed as disinfection of water. Which of the following is a water disinfectant?

Chlorine
Alkalis
Benzene hexachloride
Alkyl benzene sulphonate (ABS)

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Environmental Engineering in CE
__________ can not control the noise pollution.

Tree plantation
Vibration damping
Use of silencers
Green house gases

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