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Environmental Engineering in CE

Environmental Engineering in CE
Which of the following radioactive wastes emits all α, β & γ rays and hence is the most hazardous of all radioactive emitters?

Sr-90
Au-198
Ra-226
I-131

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Environmental Engineering in CE
Aerodynamic noise resulting from turbulent gas flow is the most prevalent source of valve noise in fluid ilow control. It is caused due to

Both A & B
Neither A nor B
Reynold stresses
Shear forces

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Environmental Engineering in CE
Aerosols present in atmospheric air may be

Positively charged
Combination of all A, B & C
Negatively charged
Neutral

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Environmental Engineering in CE
5-200 μm size particles are called

Dust
Colloids or aerosols
Smoke
Powder

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Environmental Engineering in CE
Exposure to chemicals having carcinogenic properties cause

Dermatitis (skin disorder)
Asphyxiation (suffocation)
Cancer
Asthma

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Environmental Engineering in CE
What is the major constituents of waste/polluted water discharged from textile, pulp & paper, tanning, distillary, dairy and meat packing industries?

Inorganic pollutants
None of these
Natural organic products
Radioactive substances

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