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Tunnelling - Engineering

Q1:

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 :

A 1 2 3 4 5 

B 2 3 5 4 1

C 4 2 1 3 5

D 2 3 1 4 5

ANS:D - 2 3 1 4 5

No answer description is available.