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Environmental Engineering in CE

Environmental Engineering in CE
Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in 'gas chamber' is about __________ ppm.

100-200
100-1000
10-100

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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.

105
185
160
135

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Environmental Engineering in CE
Which is a secondary air pollutant?

Nitrogen dioxide
Photochemical smog
Sulphur dioxide
Dust particles

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

1000
100
2000
5

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Environmental Engineering in CE
Noise level heard inside a bus in busy city traffic or inside a sub-way train corresponds to about __________ decibels.

120
140
75
95

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Environmental Engineering in CE
Higher concentration of nitrogen dioxide in atmospheric air causes

Bronchitis
Asphyxiation
Cancer
Corrosion

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