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Environmental Engineering in CE

Environmental Engineering in CE
TLV of mercury in potable (drinking) water is about __________ ppm.

0.001
1
5
0.1

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Environmental Engineering in CE
'Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a 'particulate'?

Dust & mists
None of these
Photochemical smog & soot
Smoke & fumes

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Environmental Engineering in CE
A shallow pond in which the sewage is retained and biologically treated is called

Lagoon
Oxidation
Skimming tank
Imhoff tank

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Environmental Engineering in CE
Which of the following is not an air pollutant?

Carcinogens
Pesticides
Ozone
Metallic powders

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Environmental Engineering in CE
Exposure to small amount of __________ results in high blood pressure & heart disease in human beings.

Hydrogen sulphide
Cadmium
Mercury
Asbestos

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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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