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Environmental Engineering in CE

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

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

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Environmental Engineering in CE
The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of __________ of water.

Dissolved oxygen content
All of these
Vapor pressure
Biological oxygen demand

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Environmental Engineering in CE
Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes

Gastritis & diarrhea
Nervous depression
All of these
Paralysis of muscles & loss of appetite

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Environmental Engineering in CE
In the context of the chemical process industries, the term BOD is normally associated with the

Characterisation of solid wastes
Characterisation of liquid effluents
Organic concentration in gaseous effluents
Characterisation of boiler feed water

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Environmental Engineering in CE
Noise level heard at a distance of about 100 metres from a jet engine with after burner is about __________ decibels.

140
200
170
120

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Environmental Engineering in CE
The maximum permissible noise level to which a man working in a chemical plant can be exposed for eight hours per day is about __________ decibels.

90
105
120
60

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