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Environmental Engineering in CE

Environmental Engineering in CE
Noise level inside a jet air liner in normal flight is about __________ decibels.

125
80
100
145

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Environmental Engineering in CE
Dose of chlorine for disinfection of water is about __________ mg/litre of water.

0.3
0.1
0.01
1

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Environmental Engineering in CE
If carbon monoxide content in atmospheric air exceeds __________ ppm, death is bound to occur.

1000
50
3000 (i.e. 0.3%)
500

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Environmental Engineering in CE
Presence of soluble organics in polluted water causes

Depletion of oxygen
Undesirable plants growth
Explosion hazards
Fire hazards

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Environmental Engineering in CE
Growth of __________ is promoted by the presence of manganese in water.

Algae
Micro-organisms
Files
Mosquitoes

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Environmental Engineering in CE
Which of the following is the most lethal water pollutant?

Chlorine
Phenol and cynide
Suspended solids
Alkalis

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