Civil Engineering - UPSC Civil Service Exam Questions - Discussion

Discussion Forum : UPSC Civil Service Exam Questions - Section 26 (Q.No. 1)

UPSC Civil Service Exam Questions

What is the correct sequence of the following events in rock tunnelling :
1. Marking tunnel profile
2. Loading explosive and blasting
3. Checking misfire
4. Muking
5. Removing foul gas
6. Setting up and drilling
7. Gunnisting
Select the correct answer using the codes given below :

1, 6, 5, 3, 4, 2, 7

1, 2, 6, 3, 5, 4, 7

1, 6, 2, 5, 4, 3, 7

1, 6, 2, 5, 3, 4, 7