Q170
The depth of the bore hole not less than . . . . . . . . m deep in advance of working containing or likely to contain accumulation of inflammable/Noxious gas to take precaution against eruption of gas.
A.
1 m
B.
0.75 m
C.
1.2 m
D.
1.5 m
AnswerAnswer: Option D
Solution
Answer: Option D
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