USCG USCG Safety Deck
Set 4 • Question #91 of 105
Launch Interactive Practice Room Normally, the percentage of oxygen in air is __________.
A
16%
B
25%
C
18%
D
21%
✓ Correct Answer
USCG NMC Regulatory Explanation
Under USCG Deck Safety, SOLAS Chapter III, and 46 CFR regulations, when addressing 'Normally, the percentage of oxygen in air is', the mandated standard is: '21%'.
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