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Environmental Engineering in CE

Environmental Engineering in CE
The pH value of potable water should be between

1 to 1.5
6.5 to 8
4 to 5
13 to 14

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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
Presence of high concentration of ozone and smog in atmospheric air causes the

Damage of electrical insulator on high tension power line
Fading of dye on textiles
Embrittlement & decrease of folding resistance of paper
Cracking of rubber products

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Environmental Engineering in CE
Threshold Limit Value (TLV) is the maximum allowable concentration (i.e. safe limit) of pollutants in air. Safe limit for SO₂ in air is __________ ppm.

2000
500
1000
5

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Environmental Engineering in CE
Main pollutants released from petroleum refineries is

CO₂, H₂S & NO₂
CO, SO₂ & H₂S
SO₃, NO₂ & CO₂
CO₂, NO & SO₃

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Environmental Engineering in CE
The widest explosive limit is of __________ , thereby making it the most explosive gas.

Acetylene
Carbon monoxide
Petrol vapor
Hydrogen

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MORE MCQ ON Environmental Engineering in CE

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