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Environmental Engineering in CE

Environmental Engineering in CE
A man exposed to excessive noise level in the working environment may suffer from

All of these
Nervousness & fatigue
Rupture of ear drum
Hearing loss

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Environmental Engineering in CE
TLV of ozone (O₃) and phosgene (COCl₂) in air is __________ ppm.

25
0.1
100
1000

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Environmental Engineering in CE
The weakest sound that can be heard by a person in a quiet environment is equivalent to __________ decibel.

5
1
20
10

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Environmental Engineering in CE
The pH value of oxidised sewage is about

6.2
13.4
1.8
7.3

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Environmental Engineering in CE
Which is a secondary air pollutant?

Sulphur dioxide
Photochemical smog
Dust particles
Nitrogen dioxide

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Environmental Engineering in CE
Deaeration of high pressure boiler feed water is done to reduce

Caustic embrittlement
Foaming from boilers
Its dissolved oxygen content
Its silica content

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