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Environmental Engineering in CE

Environmental Engineering in CE
5-200 μm size particles are called

Colloids or aerosols
Powder
Dust
Smoke

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

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Environmental Engineering in CE
__________ is removed from water by lime-soda process.

Foul smell and taste
Permanent hardness
Iron and manganese
Temporary hardness

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Environmental Engineering in CE
Threshold limit value (TLV) of CO in air is __________ ppm.

2000
50
5000
5

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Environmental Engineering in CE
Workers working in __________ industry are most prone to white lung cancer.

Coal mining
Textile
Asbestos
Limestone mining

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Environmental Engineering in CE
Tri-sodium phosphate is used in boiler water treatment to reduce

Caustic embrittlement
Suspended silica
Turbidity
Dissolved oxygen

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