Q23
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
AnswerAnswer: Option D
Solution
Answer: Option D
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