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Environmental Engineering in CE

Environmental Engineering in CE
Pollution by particulate matter emission in the atmosphere does not take place during metal

Grinding
Machining
Polishing
Cutting

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Environmental Engineering in CE
Which is the most efficient dust removal equipment for removal of sub-micronic dust particles from blast furnace gas?

Packed scrubber
Gravity settling chamber
Electrostatic precipitator
Hydrocyclone

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Environmental Engineering in CE
In water treatment plant, zeolite process is used to remove the __________ of water.

Hardness
Alkalinity
Acidity
Iron & zinc

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Environmental Engineering in CE
Sound produced by an automobile horn heard at a distance of 1.5 metres corresponds to about __________ decibels.

90
150
180
120

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Environmental Engineering in CE
Which of the following is a green house gas other than CO₂ ?

Methane
All of these
Nitrous oxide
Chlorofluro carbons (CFC)

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Environmental Engineering in CE
Which of the following is the most severe air pollutant?

NOx
Hydrocarbons
CO
SO₂

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