USCG USCG Safety Deck
Set 2 • Question #39 of 105
Launch Interactive Practice Room The atmosphere in a tank is too rich when it is __________.
A
incapable of supporting combustion because the hydrocarbon vapor content makes the atmosphere below the LFL (Lower Flammable Level)
B
capable of supporting combustion
C
in a noncombustible state which can be relied on to occur naturally on a regular basis
D
incapable of supporting combustion because the hydrocarbon vapor content makes the atmosphere above the UFL (Upper Flammable Limit)
✓ Correct Answer
USCG NMC Regulatory Explanation
Under USCG Deck Safety, SOLAS Chapter III, and 46 CFR regulations, when addressing 'The atmosphere in a tank is too rich when it is', the mandated standard is: 'incapable of supporting combustion because the hydrocarbon vapor content makes the atmosphere above the UFL (Upper Flammable Limit)'.
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