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Environmental Engineering in CE

Environmental Engineering in CE
Inhalation of silica dust causes a disease called

Bronchitis
Pneumoconiosis
None of these
Silicosis

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Environmental Engineering in CE
Carbonaceous particles having size less than 1 μm are called

Smoke
Aggregates
Grit
Aerosols

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Environmental Engineering in CE
Noise level inside a jet air liner in normal flight is about __________ decibels.

125
100
80
145

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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
Skimming off
Biological oxidation

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Environmental Engineering in CE
Which of the following is not an air pollutant?

Pesticides
Carcinogens
Metallic powders
Ozone

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Environmental Engineering in CE
COD of raw municipal sewage may be in the range of about __________ mg/litre.

5-10
90-120
1-2
1500-2500

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