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Environmental Engineering in CE

Environmental Engineering in CE
Out of the following, TLV of __________ is maximum (about 500 ppm).

Carbon dioxide
Acetaldehyde
Carbon disulphide
Toluene

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Environmental Engineering in CE
5-200 μm size particles are called

Smoke
Dust
Colloids or aerosols
Powder

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Environmental Engineering in CE
Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of __________ present in it.

None of these
Ortho-xylene
Potassium cyanide
Coal ash

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Environmental Engineering in CE
Beyond what concentration of H₂S in air, acute danger to human life exists?

300 ppm
50 ppm
100 ppm
700 ppm

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Environmental Engineering in CE
Particulates (< 1μm size) remaining suspended in air indefinitely and transported by wind currents are called

Mists
Aerosols
Smoke
Fumes

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Environmental Engineering in CE
Peroxyacyl nitrate (PAN), a pollutant is found in the

Exhaust of nitric acid plant
Flue gas of coal based power plant
Automobile exhaust
Exhaust of sulphuric acid plant

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