Civil Engineering - Tunnelling - Discussion

Discussion Forum : Tunnelling - Section 1 (Q.No. 19)
19.
The following operations are required for tunnelling in rocky terrain :
1. Removing the foul gases
2. Marking the tunnel profile
3. Setting up and drilling
4. Checking misfire
5. Mucking
The correct sequence is :
1 2 3 4 5
2 3 5 4 1
4 2 1 3 5
2 3 1 4 5
Answer: Option
Explanation:
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