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Civil Engineering - Waste Water Engineering - Discussion

Discussion Forum : Waste Water Engineering - Section 7 (Q.No. 11)
Waste Water Engineering
11.
Pick up the incorrect statement from the following for allowing workers to enter sewers
The particular manhole and one manhole on up stream and one manhole on down stream should remain open for 30 minutes
Proper tests for the presence of poisonous gases must be carried out
The men entering the manhole should be advised to smoke in the sewer
Warning signals should be erected
None of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
1 comments Page 1 of 1.
Sultaan said:   5 years ago
No, smoking or open flames should be allowed, as methane gas is highly inflammable.
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