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Environmental Engineering in CE

Environmental Engineering in CE
Presence of a certain minimum quantity of flourine is desirable in potable water to prevent

Corrosion
Water-borne disease
Scale formation
Dental cavities

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Environmental Engineering in CE
Which of the following processes is involved in the biochemical treatment of sewage effluents?

Oxidation
Reduction
Fermentation
Dehydration

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

Green house gases
Vibration damping
Use of silencers
Tree plantation

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

Nitric acid making
Nitrogenous fertiliser
Any of these
Detergent

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Environmental Engineering in CE
In water treatment, alum[Al2(SO₄)3] is used for the process of

Sedimentation
Disinfection
Coagulation
Filtration

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Environmental Engineering in CE
Noise level during normal conversation among men is about __________ decibles.

115
45
10
90

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