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Environmental Engineering in CE

Environmental Engineering in CE
Maximum permissible residual chlorine in treated water should be __________ mg/litre.

0.001 to 0.01
02 to 0.3
2 to 3
5 to 10

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Environmental Engineering in CE
Green house effect is accentuated by

Increased transportation activity
Deforestation
Rapid industrialisation
All of these

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Environmental Engineering in CE
The principal gas evolved from sludge digestion tank is

CO
CO₂
CH₄
N₂

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Environmental Engineering in CE
Ionisation potential employed in the industrial electrostatic precipitator is of the order of

30 to 70 kV DC
30 to 70 kV AC
230 V AC
230 V DC

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Environmental Engineering in CE
In the context of the chemical process industries, the term BOD is normally associated with the

Characterisation of solid wastes
Characterisation of boiler feed water
Organic concentration in gaseous effluents
Characterisation of liquid effluents

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Environmental Engineering in CE
Which of the following industries discharge mercury as a pollutant?

Phosphoric acid plant
Chloro-alkali industry
Tanneries
Beverage plant

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