Discussion :: Tunneling
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Pick up the correct statement regarding drilling a tunnel from the following:
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A.
Holes are drilled by pneumatically operated rock drills
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B.
One drill is required for each 4 to 5 m2 force area
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C.
The diameter of the bore hole at the deepest point should be 6 mm more than the diameter of the cartridge
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D.
All of the above.
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Answer : Option D
Explanation :
No answer description available for this question.
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