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Chemical Engineering - Environmental Engineering

Exercise : Environmental Engineering - Section 5
46.
The weakest sound that can be heard by a person in a quiet environment is equivalent to __________ decibel.
1
5
10
20
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
Inorganic impurities causing water pollution is
fats
carbohydrates
salts of metals
protein
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
The main type of sludge gas evolved during sewage treatment in Imhoff tank is
CO2
CH4
CO
H2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about __________ ppm.
1
5
50
500
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
The pH value of oxidised sewage is about
1.8
6.2
7.3
13.4
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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