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Chemical Engineering - Environmental Engineering

Exercise : Environmental Engineering - Section 2
26.
Which of the following radioactive wastes emits all α, β & γ rays and hence is the most hazardous of all radioactive emitters?
I-131
Sr-90
Au-198
Ra-226
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
COD of raw municipal sewage may be in the range of about __________ mg/litre.
1-2
5-10
90-120
1500-2500
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
Maximum permissible turbidity in potable water is __________ ppm.
1
10
250
1000
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
Presence of __________ hardness is responsible for the temporary hardness in water.
carbonate
calcium
choride
sulphate
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
Dose of chlorine for disinfection of water is about __________ mg/litre of water.
0.01
0.1
0.3
1
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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