Question 1883 Deck Safety

70% to pass

Which statement is TRUE concerning protection of double bottom tanks against excessive pressure?

A Each vent for the tank must be equal to the area of the tank filling line.
B There must be twice as much vent area as the area of the fill line.
C The total area of the vents or the overflow shall be at least 125% of the area of the fill line.
D The tanks must be protected by overflows.
AI Explanation

The correct answer is C) The total area of the vents or the overflow shall be at least 125% of the area of the fill line. This is the correct answer because the Code of Federal Regulations (CFR) requires that the total area of the vents or the overflow shall be at least 125% of the area of the fill line in order to protect double bottom tanks against excessive pressure. This regulation ensures that the tanks have sufficient venting capacity to prevent pressure buildup during filling operations. The other options are incorrect because A) and B) do not meet the 125% requirement specified in the CFR, and D) mentions overflows but does not address the vent area requirement.

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Official Resources
46 CFR Lifesaving Equipment USCG Marine Safety Center USCG National Maritime Center
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