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Chemical Engineering - Environmental Engineering

Exercise : Environmental Engineering - Section 2
16.
What are the methods of treatment & disposal of radioactive wastes ?
Evaporation & chemical precipitation.
Biological methods & adsorption in ion exchange materials.
Fixing into a solid mass with cement and sinking deep in the sea.
All (a), (b) & (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in
coagulation and flocculation of colloids.
oxidation of carbonaceous matter to CO2.
nitrification or oxidation of ammonia derived from breakdown of nitrogeneous organic matter to the nitrite and eventually to the nitrate.
all (a), (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
Main pollutant present in automobile exhaust is
CO
CO2
NO
hydrocarbons
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about __________ decibels.
20
60
90
120
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
Industrial workers working in leather tanning & manufacturing units are prone to suffer from
respirtory ailments (e.g. bronchitis).
skin diseases (e.g. dermatities).
silicosis.
blurred vision.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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