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Environmental Engineering in CE

Environmental Engineering in CE
Higher concentration of nitrogen dioxide in atmospheric air causes

Corrosion
Cancer
Asphyxiation
Bronchitis

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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

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

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Environmental Engineering in CE
Radioactive substances present in the polluted water stream can be removed by

None of these
Adsorption in ion exchange materials
Biological oxygen treatment
Coagulation and filtration

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Environmental Engineering in CE
The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of __________ of water.

Vapor pressure
Dissolved oxygen content
All of these
Biological oxygen demand

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Environmental Engineering in CE
When the concentration of SO₂ in air is greater than __________ ppm, it gives a pungent smell.

0.01
1
0.1
4

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Environmental Engineering in CE
Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N₂ in contaminated air at which it acts as a natural asphyxant is ≥ __________ percent.

80
92
88
84

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