Q193
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
AnswerB.
0.6, 14
C.
0.3, 8
D.
0.7, 20
Answer: Option A
Solution
Answer: Option A
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