Question 2487 Deck Safety
70% to passA 7,000 ton displacement tankship carries two slack tanks of alcohol with a S.G. of 0.8. Each tank is 50 ft. long and 30 ft. wide. What is the reduction in GM due to free surface with the vessel floating in sea water, S.G. is 1.026?
A
.36 ft
B
.46 ft
C
.72 ft
D
.82 ft
AI Explanation
The correct answer is C) .72 ft. The reduction in GM (Metacentric Height) due to free surface effect can be calculated using the formula: Reduction in GM = (I/V) * (1 - SG_liquid/SG_water), where I is the moment of inertia of the free surface, V is the volume of the vessel, and SG_liquid and SG_water are the specific gravities of the liquid and water, respectively. In this case, with the given tank dimensions and specific gravity of the alcohol (0.8), the calculated reduction in GM is 0.72 ft. The other options are incorrect because they do not accurately reflect the reduction in GM based on the provided information.
Related Questions
Q@q.QuestionNumber:An immersion suit must be equipped with a(n) _______________.
Q@q.QuestionNumber:Line throwing apparatus aboard ship must contain _______________.
Q@q.QuestionNumber:Which group would be used to send the signal Greenwich mean time 11:35 pm?
Q@q.QuestionNumber:The SS AMERICAN MARINER has on board 6450 tons of cargo with an LCG-FP of 274.4...
Q@q.QuestionNumber:Freeboard is measured from the upper edge of the _______________.
Ready to test your knowledge?
Take a Deck Safety Practice ExamOfficial Resources
Want to practice with timed exams?
Download Coast Guard Exams for the full exam experience with progress tracking.
Get the App