If any determination shows the percentage of inflammable gas to exceed . . . . . . . ., determinate shall be made or samples of air taken at intervals not exceeding . . . . . . . . hours. for so long as such content exceeds that percentage and for the seven next following days.
A. 0.8, 24
B. 0.6, 14
C. 0.3, 8
D. 0.7, 20
Answer: Option A
This Question Belongs to Mining Engineering >> Mine Legislation And General Safety
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