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Environmental Engineering in CE

Environmental Engineering in CE
Noise emitted by a ventilation fan at a distance of 3 metres is about __________ decibels.

145
105
125
85

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

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

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

Micro-organisms
Mosquitoes
Algae
Files

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

Copper sulphate
Hydrochloric acid
Sodium sulphate
Lime

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Environmental Engineering in CE
As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is __________ μg/m³.(μg-microgram)

750
800
90
10

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Environmental Engineering in CE
Algae growth in water is controlled by

Chlorination
Deoxidation
Aeration
Bleaching

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MORE MCQ ON Environmental Engineering in CE

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