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Tunnel engineering
Note:- You can add tough questions into your favourite list for second revision. |
The correct sequence of drilling equipment for increasing size of holes in tunnels is | |
A. | wagon drill, churn drill, shot drill [Correct Answer] |
B. | wagon drill, shot drill, churn drill [Wrong Answer] |
C. | shot drill, churn drill, wagon drill [Wrong Answer] |
D. | churn drill, wagon drill, shot drill [Wrong Answer] |