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Environmental Engineering in CE

Environmental Engineering in CE
Presence of soluble organics in polluted water causes

Depletion of oxygen
Fire hazards
Explosion hazards
Undesirable plants growth

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Environmental Engineering in CE
The main industrial source of emission of hydrogen sulphide air pollutant is

Metallurgical roasting & smelting plant
Petroleum refineries
Pulp and paper plant
Coal based thermal power plants

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Environmental Engineering in CE
Cleaning is done by(i) Scraping and removal in filters slow sand(ii) Back washing in slow sand filters(iii) Scraping and removal in filters rapid sand(iv) Back washing in rapid sand filtersThe correct answer is

(i) and (iv)
(ii) and (iv)
(i) and (ii)
(ii) and (iii)

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Environmental Engineering in CE
Maximum permissible residual chlorine in treated water should be __________ mg/litre.

5 to 10
02 to 0.3
2 to 3
0.001 to 0.01

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Environmental Engineering in CE
What is the major constituents of waste/polluted water discharged from textile, pulp & paper, tanning, distillary, dairy and meat packing industries?

Natural organic products
Radioactive substances
Inorganic pollutants
None of these

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Environmental Engineering in CE
Acute danger to human life (i.e. death) exists, if the concentration of CO₂ in atmospheric air exceeds __________ percent (by volume).

1
3
7
20

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MORE MCQ ON Environmental Engineering in CE

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