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Chemical Engineering - Environmental Engineering

Exercise : Environmental Engineering - Section 1
36.
Ionisation potential employed in the industrial electrostatic precipitator is of the order of
30 to 70 kV DC
30 to 70 kV AC
230 V AC
230 V DC
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
The widest explosive limit is of __________ , thereby making it the most explosive gas.
acetylene
petrol vapor
hydrogen
carbon monoxide
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
Aerobic biological oxidation ponds used for the purification of polluted water
destroys/removes pathogen from the sewage.
is not very effective for nonbiodegradable substances (e.g. ABS) containing effluents.
destroys/removes pathogen much more effectively if the sewage is chlorinated.
all (a), (b) & (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
Polluted water having low BOD are most economically treated in
sedimentation tanks
oxidation ponds
sludge digester
clarifier
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
Tri-sodium phosphate is used in boiler water treatment to reduce
turbidity
caustic embrittlement
suspended silica
dissolved oxygen
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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