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Environmental Engineering in CE

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

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

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Environmental Engineering in CE
Main pollutants released from petroleum refineries is

CO₂, NO & SO₃
CO₂, H₂S & NO₂
CO, SO₂ & H₂S
SO₃, NO₂ & CO₂

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

Turbidity
Total solids
Color (Hazen)
All of these

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Environmental Engineering in CE
In sewage treatment, its sedimentation is speeded up by commonly adding

Lime
Hydrochloric acid
Sodium sulphate
Copper sulphate

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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

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

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Environmental Engineering in CE
Photochemical smog is formed from automobile exhaust

All of these
Is harmful for crops and trees also besides causing eye irritation & asthma
By reaction of hydrocarbon & nitric oxide in presence of sunlight
Appears only on sunny days

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