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Environmental Engineering in CE

Environmental Engineering in CE
Presence of a certain minimum quantity of flourine is desirable in potable water to prevent

Corrosion
Water-borne disease
Dental cavities
Scale formation

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Environmental Engineering in CE
Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of __________ present in it.

Coal ash
Potassium cyanide
None of these
Ortho-xylene

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Environmental Engineering in CE
The common pollutant generated in chlor-alkali industry and battery manufacture is

Phosphate
None of these
Brine
Mercury

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Environmental Engineering in CE
Presence of bacteria in potable (drinking) water causes

Bad odour
Turbidity
Bad taste & colour
Disease

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Environmental Engineering in CE
High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes

Respiratory disease (e.g., asthma)
Reduced crop yield
Cancer
Silicosis

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Environmental Engineering in CE
The major reason of hydrodynamic noise (i.e., noise resulting from liquid flow) is

Fluctuation in liquid flow
Cavitation
Boundary layer separation
Pipe vibrations

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