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Environmental Engineering in CE

Environmental Engineering in CE
The common pollutant generated in chlor-alkali industry and battery manufacture is

None of these
Brine
Mercury
Phosphate

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Environmental Engineering in CE
Foaming and priming in boiler operation can be reduced by reduction in __________ in feed water.

Total solids
Turbidity
Color (Hazen)
All of these

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Environmental Engineering in CE
The per capital consumption of a locality is affected by(i) Climatic conditions(ii) Quality of water(iii) Distribution pressure

Only (i)
Both (i) and (ii)
All (i), (ii) and (iii)
Both (i) and (iii)

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Environmental Engineering in CE
CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing __________ molecules of ozones.

10²
10¹⁵
10⁵
10⁹

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Environmental Engineering in CE
Which is the most widely used coagulant for the treatment of turbid water?

Alum (aluminium sulphate)
Lime
Sodium aluminate
Ferric chloride

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Environmental Engineering in CE
Noise level during normal conversation among men is about __________ decibles.

115
10
90
45

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