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Chemical Engineering - Environmental Engineering

Exercise : Environmental Engineering - Section 5
1.
The term Biological Oxygen Demand (BOD) is used in relation to
potable water
cooling water
distilled water
industrial effluents
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
The destruction of water-borne pathogens is termed as disinfection of water. Which of the following is a water disinfectant ?
Chlorine
Alkalis
Benzene hexachloride
Alkyl benzene sulphonate (ABS)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of
ozone and iodine.
chlorine or its compounds.
ultraviolet light for irradiation of water.
all (a), (b) & (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
Which of the following processes is involved in the biochemical treatment of sewage effluents ?
Oxidation
Reduction
Dehydration
Fermentation
Answer: Option
Explanation:
No answer description is available. Let's discuss.
5.
Infective bacteria in water is killed by the __________ process.
sterilisation
aeration
disinfection
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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