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Environmental Engineering in CE

Environmental Engineering in CE
Maximum permissible turbidity in potable water is __________ ppm.

1000
250
10
1

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Environmental Engineering in CE
Threshold Limit Value (TLV) is the maximum allowable concentration (i.e. safe limit) of pollutants in air. Safe limit for SO₂ in air is __________ ppm.

2000
1000
500
5

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Environmental Engineering in CE
Smog is

Nothing but black smoke
A combination of smoke and fog
A liquid particle resulting from vapor condensation
A solid particle e.g. flyash

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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?

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

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Environmental Engineering in CE
Oil and grease present in an emulsified state in waste water discharged from industries can be removed by

Settling out using chemical reagents
Chlorination
Skimming off
Biological oxidation

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Environmental Engineering in CE
H₂S present in gaseous stream can be removed by adsorption on

Limestone powder
Silica gel
Bog iron
Active carbon

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MORE MCQ ON Environmental Engineering in CE

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