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Environmental Engineering in CE

Environmental Engineering in CE
Siderosis is a disease caused by the inhalation of __________ dust.

Coal
Iron
Silica
None of these

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Environmental Engineering in CE
__________ is the process of killing organism in water.

Sedimentation
Sterilisation
Disinfection
Coagulation

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Environmental Engineering in CE
Maximum allowable concentration of CO₂ in air for safe working is __________ ppm (parts per million).

2000
5000
50
1000

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Environmental Engineering in CE
Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly __________ substances.

None of these
Radioactive
Organic
Inorganic

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Environmental Engineering in CE
Which of the following causes death by asphyxiation, if its presence in atmospheric air exceeds maximum allowable concentration (i.e. > 50 ppm)?

Sulphur dioxide
Peroxyacyl nitrate
Carbon monoxide
Benzopyrene

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Environmental Engineering in CE
The function of skimming tank in sewage treatment is to remove __________ substances.

Suspended solid
Dissolved solid
Oil & fatty
Gritty & inorganic

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