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Environmental Engineering in CE

Environmental Engineering in CE
TLV of mercury in potable (drinking) water is about __________ ppm.

0.001
0.1
5
1

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Environmental Engineering in CE
Water effluent generated in printing industry is decolourised by

Reverse osmosis
Ion exchange technique
Adsorption
Electrolytic decomposition

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Environmental Engineering in CE
Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted water stream?

Chemical coagulation
Mechanical flocculation
Sedimentation tank
Circular clarifier

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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?

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

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Environmental Engineering in CE
Presence of __________ in water stream are deleterious to aquatic life.

Soluble and toxic organics
All of these
Heavy metals and cynides
Suspended solids

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Environmental Engineering in CE
H₂S present in gaseous stream can be removed by adsorption on

Limestone powder
Active carbon
Bog iron
Silica gel

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MORE MCQ ON Environmental Engineering in CE

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