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Environmental Engineering in CE

Environmental Engineering in CE
Green house gases blanket/block the infrared radiation from earth's surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect?

N₂
H₂
SO₃
CO₂

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Environmental Engineering in CE
Black smoke coming out of the chimney of a furnace is an indication of the use of __________ in the furnace.

Low amount of excess combustion air
Pulverised coal as fuel
Hydrocarbon fuel
Large quantity of excess combustion air

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Environmental Engineering in CE
The common pollutant generated in chlor-alkali industry and battery manufacture is

Brine
None of these
Mercury
Phosphate

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Environmental Engineering in CE
Scale formation in boiler is controlled by

Eliminating H₂S in feed water
Reduction in hardness, silica & alumina in feed water
Keeping the pH value of feed water just below 7
Preheating of feed water

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Environmental Engineering in CE
Presence of __________ bacteria in water causes disease like typhoid.

Anaerobic
Aerobic
Non-pathogenic
Pathogenic

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Environmental Engineering in CE
Which of the following air pollutants is not toxic to vegetation i.e., doesn't cause vegetation damage?

Smog & ozone
Carbon monoxide
Sulphur dioxide & spray of weed killers
Hydrogen fluoride & nitrogen oxides

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