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Environmental Engineering in CE

Environmental Engineering in CE
Which of the following plants does not emit appreciable amount of SO₂ in atmosphere?

Petroleum refinery
Nitric acid plant
Sulphuric acid plant
Thermal power plant

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Environmental Engineering in CE
Which of the following gases is having the widest explosion limit (about 2 to 81% gas in gas-air mixture), rendering it the property of the most explosive gas?

Carbon monoxide
Hydrogen
Ammonia
Acetylene

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

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

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Environmental Engineering in CE
Which of the following acts as a natural source of air pollution?

Deforestation
Forest fire
None of these
Volcanic eruption

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Environmental Engineering in CE
Inhalation of lead compounds present in the automobile exhausts (using leaded petrol) causes

All of these
Nervous system disorder
Anaemia
Blood poisoning

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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.

105
120
60
90

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