USCG USCG Safety Deck
Set 1 • Question #12 of 105
Launch Interactive Practice Room The most important figure in calculating the free surface constant of a tank carrying liquids is __________.
A
depth displacement
B
breadth
✓ Correct Answer
C
length
D
displacement
USCG NMC Regulatory Explanation
The free surface effect of slack liquid in tanks creates a virtual rise in the vessel's center of gravity ($GG' = i / \nabla$), reducing the transverse metacentric height ($GM$) and impairing righting arm ($GZ$) energy.
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