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Environmental Engineering in CE

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?

CO₂
H₂
N₂
SO₃

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Environmental Engineering in CE
Which of the following is an adsorbant for removal of nitrogen oxides from gas/air?

Silica gel
Bog iron (iron oxide)
Active carbon
Pulverised limestone

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Environmental Engineering in CE
Operating principle of cyclone separator is based on the action of __________ dust particles.

Gravitational force on
Diffusion of
Electrostatic force on
Centrifugal force on

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Environmental Engineering in CE
World environment day is observed every year on the 5th of

June
July
September
December

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Environmental Engineering in CE
Presence of non-biodegradable substances, like alkyl benzene sulphonate (ABS) from the detergents in polluted water stream causes

Depletion of dissolved oxygen
Persistent foam
Fire hazards
Explosion hazards

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Environmental Engineering in CE
Presence of dissolved impurities of __________ is responsible for the red brownish color of water.

Bi-carbonates
Arsenic
Carbonates
Iron & manganese

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