The correct sequence of drilling equipment for increasing size of holes in tunnels is________________?

Civil Engineering Mcqs

The correct sequence of drilling equipment for increasing size of holes in tunnels is________________?

(A)  wagon drill, churn drill, shot drill

(B)  wagon drill, shot drill, churn drill

(C)  shot drill, churn drill, wagon drill

(D)  churn drill, wagon drill, shot drill

Submitted By :Ali Uppal

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