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Environmental Engineering in CE

Environmental Engineering in CE
The resistance of water to the passage of light through it is a measure of the

Turbidity
Hardness
Color
Dissolved gases

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Environmental Engineering in CE
The amount of coagulant needed for coagulation of water increases with(i) Increase in turbidity of water(ii) Decrease in turbidity of water(iii) Increase in temperature of water(iv) Decrease in temperature of waterThe correct answer is

(i) and (ii)
(i)and(iv)
(ii) and (iv)
(ii) and (iii)

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Environmental Engineering in CE
There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth's surface in which human being along with other organisms live is called troposphere. The rate at which air temperature in the troposphere gradually decreases with height is about __________ °C/km.

6.5
15
0.05
1

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Environmental Engineering in CE
Presence of nitrogen and phosphorous in waste water discharged into lakes and ponds causes

Foaming
Odour nuisances
Turbidity
Undesirable plant growth

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Environmental Engineering in CE
Reinglemann chart is used for the measurement of the

Exhaust gas density
Smoke density from a chimey
Flue gas temperature
Combustibles present in automobile exhaust

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Environmental Engineering in CE
Pollution by particulate matter emission in the atmosphere does not take place during metal

Polishing
Grinding
Machining
Cutting

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