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Environmental Engineering in CE

Environmental Engineering in CE
TLV of lead for public sewer/waste water is about __________ ppm.

150
1
25
650

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Environmental Engineering in CE
A man exposed to excessive noise level in the working environment may suffer from

Hearing loss
Nervousness & fatigue
Rupture of ear drum
All of these

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Environmental Engineering in CE
Brown spots in fabrics will be caused by washing with water containing large amount of .

Bromine
Zinc
Iodine
Iron

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

105
125
145
85

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Environmental Engineering in CE
Which of the following pollutants is absent in the emissions from a fertiliser plant ?

SO₂ & SO₃
NH₃
CO
NO₂

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Environmental Engineering in CE
Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan

Of increased diameter
With greater number of blades
Neither A nor B
Both A & B

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