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Environmental Engineering in CE

Environmental Engineering in CE
Beyond what concentration of H₂S in air, acute danger to human life exists?

300 ppm
700 ppm
100 ppm
50 ppm

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Environmental Engineering in CE
Fresh domestic sewage is __________ in color.

Dark brown
Black
Grey
Red

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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
120
50

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Environmental Engineering in CE
Corrosion in boilers can be prevented by

Enhancing pH of feed water by adding alkali
All of these
Deaeration of feed water
Feeding sodium sulphite or hydrazine phosphate to the boilers, which combines with oxygen and prevents corrosion

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Environmental Engineering in CE
Inhalation of lead compounds present in automobile exhaust (using leaded petrol) causes

Nervous system disorder
All of these
Blood poisoning
Anaemia

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Environmental Engineering in CE
Arsenic pollutant is not generated in____industries.

Glass & ceramic
Tanneries
Beverages
Any of these

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MORE MCQ ON Environmental Engineering in CE

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