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Environmental Engineering in CE

Environmental Engineering in CE
In water chemical treatment plant, use of chloramines ensures

Taste & odour control
Removal of permanent hardness
Disinfection
Weed control in reservoirs

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Environmental Engineering in CE
Growth of __________ is promoted by the presence of manganese in water.

Mosquitoes
Files
Algae
Micro-organisms

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Environmental Engineering in CE
Inhalation of silica dust by human being causes

Tuberculosis
Both B & C
Shortness of breath
Asphyxiation

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Environmental Engineering in CE
Which is the most practical and economical method for removal of suspended solid matter from polluted water?

Sedimentation
Chlorination
Biological oxidation
Skimming off

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Environmental Engineering in CE
Which of the following pollutants is not emitted during volcanic eruptions?

Hydrocarbons
SO₂
H₂S
CO

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Environmental Engineering in CE
As compared to rapid sand filters, slow sand filters give
(i) Slower filtration rate
(ii) Higher filtration rate
(iii) Lesser efficiency in removal of bacteria
(iv) Higher efficiency in removal of bacteria
The correct answer is

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

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