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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
5 to 10
02 to 0.3
2 to 3

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Environmental Engineering in CE
Carcinogenic air pollutants cause

Anemia
Asphyxiation (suffocation)
Cancer
Bone decay

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Environmental Engineering in CE
Exposure to chemicals having carcinogenic properties cause

Cancer
Asphyxiation (suffocation)
Dermatitis (skin disorder)
Asthma

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Environmental Engineering in CE
Presence of carbon monoxide in atmosphere produced by decomposition of chlorophyl and haemoglobin breakdown of some animals, beyond TLV (>50 ppm)

Inhances the green house effect
Causes asphyxia
Causes increase in sea level
Acts as a green house gas thereby raising earth's temperature

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Environmental Engineering in CE
Inhalation of lead compounds present in the automobile exhausts (using leaded petrol) causes

Nervous system disorder
All of these
Anaemia
Blood poisoning

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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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