Civil Engineering - Waste Water Engineering - Discussion

Discussion Forum : Waste Water Engineering - Section 4 (Q.No. 13)
13.
A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of
Carbondioxide gas
Hydrogen sulphide gas
Methane gas
Petrol vapours.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
1 comments Page 1 of 1.

Kaku said:   6 years ago
It indicates the presence of oxygen in the manhol.

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