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Environmental Engineering in CE

Environmental Engineering in CE
Main pollutants released from iron & steel industry is

SO₃, NO₂ & CO₂
CO, CO₂ & SO₂
CO₂, H₂S & NO₂
H₂S, NO & SO₃

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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
Removal of __________ results from the disinfection of water.

Turbidity
Bacteria
Hardness
Odour

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

All of these
Nitrous oxide
Methane
Chlorofluro carbons (CFC)

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Environmental Engineering in CE
Which of the following radioactive wastes emits all α, β & γ rays and hence is the most hazardous of all radioactive emitters?

I-131
Au-198
Sr-90
Ra-226

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Environmental Engineering in CE
If the coli form bacteria is present in a sample of water, then the coli-form test to be conducted is(i) Presumptive coli-form test(ii) Confirmed coli-form test(iii) Completed coli-form test

Only (i)
All (i), (ii) and (iii)
Both (i) and (iii)
Both (i) and (ii)

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