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Environmental Engineering in CE

Environmental Engineering in CE
Which of the following is not a weightless pollutant?

Radioactive rays
Noise pollution
Thermal pollution
SPM

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Environmental Engineering in CE
Industrial workers working in leather tanning & manufacturing units are prone to suffer from

Silicosis
Skin diseases (e.g. dermatities)
Respirtory ailments (e.g. bronchitis)
Blurred vision

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Environmental Engineering in CE
Radioactive substances present in the polluted water stream can be removed by

Biological oxygen treatment
Coagulation and filtration
None of these
Adsorption in ion exchange materials

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Environmental Engineering in CE
Death may occur, when SO₂ concentration in atmospheric air exceeds __________ ppm.

100
20
400
200

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Environmental Engineering in CE
Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundaries causes

Shortness of breath
All of these
Asphyxiation (suffocation)
Tuberculosis

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Environmental Engineering in CE
The ratio of oxygen available to the oxygen required for stabilisation of sewage is called the

Oxygen ion concentration
Relative stability
Bacterial stability factor
Biological oxygen demand (BOD)

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