Tunnel Engineering
The following operations are required for tunnelling in rocky terrain:1.Removing the foul gases2.Marking the tunnel profile3.Setting up and drilling4.Checking misfire5.MuckingThe correct sequence is:
- A. 1, 2, 3, 4, 5
- B. 2, 3, 5, 4, 1
- C. 4, 2, 1, 3, 5
- D. 2, 3, 1, 4, 5