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Environmental Engineering in CE

Environmental Engineering in CE
Which of the following is the most major constituents of air pollutants?

Hydrogen sulphide
Carbon monoxide
Oxides of sulphur
Oxides of nitrogen

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Environmental Engineering in CE
Aerodynamic noise resulting from turbulent gas flow is the most prevalent source of valve noise in fluid ilow control. It is caused due to

Neither A nor B
Shear forces
Both A & B
Reynold stresses

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Environmental Engineering in CE
Arsenic pollutant is not generated in____industries.

Any of these
Beverages
Tanneries
Glass & ceramic

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Environmental Engineering in CE
Which of the following radioactive wastes emits all α, β & γ rays and hence is the most hazardous of all radioactive emitters?

Sr-90
I-131
Ra-226
Au-198

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Environmental Engineering in CE
Fluorosis is caused due to the presence of excessive amount of __________ in drinking water.

Lead
Arsenic
Fluoride
Mercury

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Environmental Engineering in CE
Shouting by a man at his full voice corresponds to a voice level of about __________ decibels.

25
80
50
120

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