Question 4859 Deck General
70% to passA semisubmersible with a displacement of 20,000 tons and KG of 52 feet discharges 300 long tons of barite from P-tanks located 120 feet above the keel. Ballast added to maintain draft has a VCG of 20 feet. What is the change in KG?
A
0.49 foot increase
B
0.50 foot decrease
C
1.50 feet decrease
D
1.80 feet decrease
AI Explanation
The correct answer is C) 1.50 feet decrease. To explain this: 1. Discharging 300 long tons of barite from a height of 120 feet above the keel will lower the overall center of gravity (KG) of the semisubmersible. The decrease in KG can be calculated using the formula: Change in KG = (weight of discharged barite * height of discharge) / total displacement. 2. Plugging in the given values, the change in KG is (300 * 120) / 20,000 = 1.50 feet decrease. 3. The other answer choices are incorrect because they do not accurately reflect the 1.50 feet decrease in KG resulting from the discharge of the barite.
Related Questions
Q5029:On the COASTAL DRILLER, hook load includes the weight of the _______________.
Q1765:When using or caring for natural-fiber rope, which of the following is NOT reco...
Q2075:The rope which is the lightest is _______________.
Q1391:In controlling pollution, which action should be taken after all dirty ballast h...
Q3200:The procedure of strengthening damaged structures on a MODU by using wood or ste...
Ready to test your knowledge?
Take a Deck General Practice Exam
Official Resources
Pass Your Coast Guard Licensing Exams!
Study offline, track your progress, and simulate real exams with the Coast Guard Exams app