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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
I-131
Au-198
Ra-226

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Environmental Engineering in CE
TLV of ammonia, nitrogen dioxide and phenol vapor in air is __________ ppm.

2000
1000
100
5

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Environmental Engineering in CE
Green house effect is accentuated by

All of these
Rapid industrialisation
Increased transportation activity
Deforestation

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Environmental Engineering in CE
Which of the following air pollutants is not toxic to vegetation i.e., doesn't cause vegetation damage?

Carbon monoxide
Sulphur dioxide & spray of weed killers
Smog & ozone
Hydrogen fluoride & nitrogen oxides

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Environmental Engineering in CE
Inhalation of lead compounds present in the automobile exhausts (using leaded petrol) causes

Blood poisoning
Nervous system disorder
Anaemia
All of these

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Environmental Engineering in CE
Insufficient washing of sand grains in a rapid sand filter causes

Expansion of filtering media
Shrinkage of filtering media
Mud balls
Air binding

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