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Environmental Engineering in CE

Environmental Engineering in CE
Noise level during normal conversation among men is about __________ decibles.

10
45
90
115

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Environmental Engineering in CE
There are thirteen metals which are treated as pollutants. Which of the following metals is not a pollutant?

Arsenic
Mercury
Lead
Aluminium

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

Grit
Powder
Aggregates
Smoke

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Environmental Engineering in CE
Industrial workers working in leather tanning & manufacturing units are prone to suffer from

Respirtory ailments (e.g. bronchitis)
Silicosis
Blurred vision
Skin diseases (e.g. dermatities)

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Environmental Engineering in CE
Atmospheric pollution caused by the exhaust gas of supresonic transport air-crafts is mostly in the atmospheric region called

Thermosphere
Stratosphere
Mesosphere
Troposphere

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Environmental Engineering in CE
When the concentration of SO₂ in air is greater than __________ ppm, it gives a pungent smell.

4
1
0.01
0.1

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