USCG USCG Safety Deck
Set 2 • Question #31 of 105
Launch Interactive Practice Room You have been carrying a liquid with flammable limits of 1% to 7% mixture with air. If your instructions say that no one shall enter the tank if the vapor concentration is over 15% of the LEL, what is the maximum allowable percentage of vapors for men to enter?
A
.15%
✓ Correct Answer
B
.85%
C
1.05%
D
7.00%
USCG NMC Regulatory Explanation
Under USCG Deck Safety, SOLAS Chapter III, and 46 CFR regulations, when addressing 'You have been carrying a liquid with flammable limits of 1% to 7% mixture with air. If your instructions say that no one shall enter the tank if the vapor concentration is over 15% of the LEL, what is the maximum allowable percentage of vapors for men to enter', the mandated standard is: '.15%'.
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