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Environmental Engineering in CE

Environmental Engineering in CE
Exposure to chemicals having carcinogenic properties cause

Dermatitis (skin disorder)
Asphyxiation (suffocation)
Cancer
Asthma

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Environmental Engineering in CE
TLV of NO₂ & NO exposure for the human being is 5 & 25 ppm respectively. Prolonged exposure of human being to NO₂ causes

Skin disorder
Bronchitis
Cancer
Bone disease

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Environmental Engineering in CE
Presence of __________ hardness is responsible for the temporary hardness in water.

Choride
Calcium
Carbonate
Sulphate

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Environmental Engineering in CE
Which of the following is not a source of ozone emission in the atmosphere?

Refrigerators
Dermatological photo-therapy equipments
High voltage electrical equipments
Xerox machines

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Environmental Engineering in CE
Green house gases blanket/block the infrared radiation from earth's surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect?

SO₃
H₂
CO₂
N₂

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Environmental Engineering in CE
Which is the most practical and economical method for removal of suspended solid matter from polluted water?

Sedimentation
Biological oxidation
Skimming off
Chlorination

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