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Environmental Engineering in CE

Environmental Engineering in CE
In water treatment, alum[Al2(SO₄)3] is used for the process of

Disinfection
Filtration
Coagulation
Sedimentation

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Environmental Engineering in CE
Fluorosis is caused due to the presence of excessive amount of __________ in drinking water.

Arsenic
Lead
Mercury
Fluoride

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Environmental Engineering in CE
Polluted water having low BOD are most economically treated in

Sedimentation tanks
Clarifier
Oxidation ponds
Sludge digester

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Environmental Engineering in CE
Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundaries causes

Shortness of breath
Asphyxiation (suffocation)
All of these
Tuberculosis

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Environmental Engineering in CE
Water filtration rate in a rapid sand filter ranges from __________ kilolitres/m²/hr.

0.1 to 1
3 to 6
10 to 15
15 to 20

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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

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

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