Q
The correct sequence of drilling equipment for increasing size of holes in tunnels is________________?
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A
A. Wagon drill, churn drill, shot drill
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B
B. Wagon drill, shot drill, churn drill
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C
C. Shot drill, churn drill, wagon drill
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D
D. Churn drill, wagon drill, shot drill
Correct Answer:
A. A. Wagon drill, churn drill, shot drill