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Environmental Engineering in CE

Environmental Engineering in CE
TLV of ammonia, nitrogen dioxide and phenol vapor in air is __________ ppm.

5
1000
100
2000

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Environmental Engineering in CE
Carcinogenic air pollutants cause

Asphyxiation (suffocation)
Anemia
Bone decay
Cancer

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Environmental Engineering in CE
Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly __________ substances.

Organic
Radioactive
None of these
Inorganic

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Environmental Engineering in CE
Sulphur dioxide present in the industrial chimney exhaust gases causes

Respiratory & lung disease
Reduction in plant's productivity owing to acid rain
Corrosion of building materials
All of these

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Environmental Engineering in CE
Removal of __________ is accomplished by aeration of water.

Dissolved gases
Suspended solids
Dissolved solids
None of these

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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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