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Environmental Engineering in CE

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

Powder
Aggregates
Smoke
Grit

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Environmental Engineering in CE
A shallow pond in which the sewage is retained and biologically treated is called

Oxidation
Lagoon
Imhoff tank
Skimming tank

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Environmental Engineering in CE
Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about __________ decibels.

135
105
185
160

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Environmental Engineering in CE
If carbon monoxide content in atmospheric air exceeds __________ ppm, death is bound to occur.

1000
500
50
3000 (i.e. 0.3%)

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Environmental Engineering in CE
Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of __________ present in it.

Ortho-xylene
Potassium cyanide
None of these
Coal ash

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Environmental Engineering in CE
Green house effect is accentuated by

Rapid industrialisation
Deforestation
All of these
Increased transportation activity

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