Question 2515 Deck Safety

70% to pass

The liquid mud tanks on your vessel measure 20'L by 18'B by 7'D. The vessel's displacement is 866 T and the specific gravity of the mud is 1.8. What is the reduction in GM due to a pair of these tanks (p/s) being slack?

A 0.24 foot
B 0.56 foot
C 0.95 foot
D 1.12 feet
AI Explanation

The correct answer is D) 1.12 feet. The reduction in GM (metacentric height) due to a pair of slack liquid mud tanks (one port, one starboard) can be calculated using the formula: Reduction in GM = (2 x VT x (SG - 1)) / D, where VT is the total volume of the tanks, SG is the specific gravity of the liquid, and D is the vessel's displacement. Given the dimensions of the mud tanks (20'L x 18'B x 7'D) and the vessel's displacement (866 T) with a mud specific gravity of 1.8, the calculation results in a reduction in GM of 1.12 feet, which is the correct answer. The other options are incorrect because they do not match the calculated result of 1.12 feet.

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