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Environmental Engineering in CE

Environmental Engineering in CE
Solid content in most of the domestic sewage is about __________ percent.

10
0.001
5
0.1

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Environmental Engineering in CE
The function of skimming tank in sewage treatment is to remove __________ substances.

Oil & fatty
Suspended solid
Gritty & inorganic
Dissolved solid

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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

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

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Environmental Engineering in CE
The type of bacteria which is active in trickling filter during biological treatment of sewage is the __________ bacteria.

Parasitic
Aerobic
Anaerobic
Saphrophytic

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Environmental Engineering in CE
The biological decomposition of organic substances in wastes controlled conditions is called

None of these
Incineration
Composting
Biological oxidation

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Environmental Engineering in CE
In sewage treatment, its sedimentation is speeded up by commonly adding

Copper sulphate
Sodium sulphate
Lime
Hydrochloric acid

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MORE MCQ ON Environmental Engineering in CE

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