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Environmental Engineering in CE

Environmental Engineering in CE
Presence of __________ in water stream are deleterious to aquatic life.

Suspended solids
Soluble and toxic organics
Heavy metals and cynides
All of these

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Environmental Engineering in CE
Which of the following is not a natural source of air pollution?

Photochemical oxidation of organic matter
Volcanic eruptions and lightening discharges
None of these
Biological decay of vegetable matter

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Environmental Engineering in CE
The commonest form of iron & manganese found in ground water as pollutant is in the form of their

Bi-carbonates
Chlorides
Sulphides
Carbonates

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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?

Acetylene
Ammonia
Hydrogen
Carbon monoxide

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Environmental Engineering in CE
Polyvinyl chloride containers are not suitable for storing

Foodstuffs
Woolen clothes
Metallic powder
None of these

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

Dental cavities
Scale formation
Water-borne disease
Corrosion

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