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Environmental Engineering in CE

Environmental Engineering in CE
Pick out the one which is not a chemical coagulant.

Ferrous sulphate
Hydrated lime
Chloramine
Aluminium sulphate

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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

All of these
Tuberculosis
Asphyxiation (suffocation)
Shortness of breath

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Environmental Engineering in CE
Scale formation in boiler is controlled by

Keeping the pH value of feed water just below 7
Reduction in hardness, silica & alumina in feed water
Preheating of feed water
Eliminating H₂S in feed water

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Environmental Engineering in CE
__________ is the process of killing organism in water.

Sterilisation
Disinfection
Coagulation
Sedimentation

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

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

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Environmental Engineering in CE
Disinfection of water is done to remove

Foul odour
Bacteria
Color
Bad taste

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