The free surface effects of a partially full...

The free surface effects of a partially full...

Question 1 of 2707066636eec28f7522a1c51c3d7

The free surface effects of a partially full liquid tank decrease with the increase of which item?

Question 1 of 27070

Q

The free surface effects of a partially full liquid tank decrease with the increase of which item?

🔍 Key Concepts

• Free surface effect and how it reduces a vessel's transverse stability • How moment of inertia of the liquid surface relates to the amount of free surface effect • The relationship between ship displacement and the impact of a given free surface moment

💭 Think About

• Think about which factor makes the same free surface moment represent a smaller fraction of the ship’s overall stability. • Consider whether putting the tank higher or lower changes the amount of free liquid shift for a given angle of heel, or just its leverage. • Ask yourself: if two ships have identical tanks with the same free surface, which ship will feel the effect more — the lighter ship or the heavier ship?

✅ Before You Answer

• Verify which option would make the free surface correction relatively smaller compared to the ship’s overall stability. • Check whether larger displacement generally makes a ship more or less sensitive to the same internal movement of liquid. • Confirm that free surface area itself increases, not decreases, the free surface effect.