Question 2513 Deck Safety
70% to passThe liquid mud tanks on your vessel measure 30'L by 15'B by 6'D. The vessel's displacement is 968 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
.19 foot
B
.42 foot
C
.64 foot
D
.87 foot
AI Explanation
The correct answer is D) .87 foot. The reduction in GM (metacentric height) due to a pair of slack liquid mud tanks (port and starboard) can be calculated using the formula: Reduction in GM = (2 x L x B x D x (SG - 1)) / (Displacement) Where: L = Length of each tank (30 feet) B = Breadth of each tank (15 feet) D = Depth of each tank (6 feet) SG = Specific gravity of the mud (1.8) Displacement = 968 tons Plugging in the values: Reduction in GM = (2 x 30 x 15 x 6 x (1.8 - 1)) / 968 = (2 x 30 x 15 x 6 x 0.8) / 968 = .87 foot The other options are incorrect because they do not match the calculated value of .87 foot.
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