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Environmental Engineering in CE

Environmental Engineering in CE
Green house effect is accentuated by

All of these
Increased transportation activity
Rapid industrialisation
Deforestation

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Environmental Engineering in CE
Carbonaceous particles having size less than 1 μm are called

Grit
Aggregates
Aerosols
Smoke

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Environmental Engineering in CE
'Safe limit' called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the

Photochemical reaction in polluted atmosphere
Automobiles exhaust
Burning of domestic fuel
Industrial chimney exhaust

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Environmental Engineering in CE
Presence of high concentration of ozone and smog in atmospheric air causes the

Embrittlement & decrease of folding resistance of paper
Damage of electrical insulator on high tension power line
Cracking of rubber products
Fading of dye on textiles

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Environmental Engineering in CE
The resistance of water to the passage of light through it is a measure of the

Dissolved gases
Turbidity
Hardness
Color

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Environmental Engineering in CE
Scale formation in boiler is controlled by

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

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