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Environmental Engineering in CE

Environmental Engineering in CE
80% less than 200 mesh size particles are called

Smoke
Powder
Grit
Aggregates

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Environmental Engineering in CE
TLV of ammonia, nitrogen dioxide and phenol vapor in air is __________ ppm.

1000
100
5
2000

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Environmental Engineering in CE
Pick out the wrong statement pertaining to 'green house' for the plants.

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Environmental Engineering in CE
Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly __________ substances.

Organic
Inorganic
Radioactive
None of these

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Environmental Engineering in CE
Which is the most efficient dust removal equipment for removal of sub-micronic dust particles from blast furnace gas?

Packed scrubber
Electrostatic precipitator
Hydrocyclone
Gravity settling chamber

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

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

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