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Environmental Engineering in CE

Environmental Engineering in CE
Noise level inside a jet air liner in normal flight is about __________ decibels.

145
80
125
100

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Environmental Engineering in CE
The biological decomposition of organic substances in wastes controlled conditions is called

Composting
Biological oxidation
None of these
Incineration

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Environmental Engineering in CE
Arsenic pollutant is not generated in____industries.

Glass & ceramic
Tanneries
Any of these
Beverages

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

Cation exchanger
Coagulation
Chlorine
Irradiation of water by ultraviolet light

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Environmental Engineering in CE
Nitrogen oxides (NOx) is not produced in the __________ industry.

Nitrogenous fertiliser
Any of these
Nitric acid making
Detergent

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

0.1
0.01
1
4

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