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Environmental Engineering in CE

Environmental Engineering in CE
Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about __________ ppm (parts per million).

1.2
4.8
0.2
0.002

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Environmental Engineering in CE
Presence of nitrates in water in excess of 50 ppm causes

Asphyxiation
Tooth decay
Gastroentetitis
Mathenoglobenemia

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Environmental Engineering in CE
Color test of water is done with an instrument called

Colorimeter
Turbidimeter
Tintometer
Electro-chemical cell

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Environmental Engineering in CE
Carcinogenic air pollutants cause

Anemia
Asphyxiation (suffocation)
Bone decay
Cancer

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Environmental Engineering in CE
Which of the following is the most severe air pollutant?

Hydrocarbons
SO₂
CO
NOx

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Environmental Engineering in CE
Foul odour and bad taste of water is removed by treating with

Copper sulphate
Alum
Bleaching powder
Activated carbon

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