Adverse effects due to free surface will...

Question 1 / 270705eccef9fbacbc34ba4d469cc

Question 1 of 270705eccef9fbacbc34ba4d469cc

Adverse effects due to free surface will result when __________.

Question 1 of 27070

Adverse effects due to free surface will result when __________.

🔍 Key Concepts

• Free surface effect and how liquid moves in a partially filled tank • How shifting liquid affects the ship's center of gravity (G) and transverse stability (GM) • Difference between static weight changes (like draft or trim) and moving liquid surfaces inside tanks

💭 Think About

• Which option actually creates a free surface — that is, a surface where liquid can move or slosh from side to side inside the vessel? • In which situation does the liquid’s movement cause a shift in the center of gravity every time the vessel heels? • Which choices talk about the vessel’s position in the water (draft/trim) only, and which talk about what’s happening inside the tank?

✅ Before You Answer

• Identify which option involves a partially filled tank, allowing liquid to move • Eliminate options that only change draft or trim without mentioning liquid moving inside • Remember: free surface effect is about liquid moving inside the vessel, not water moving outside around the hull

Question 1 of 27070

Adverse effects due to free surface will result when __________.

a portion of liquid is removed from a full tank

the vessel's draft is decreased exposing more surface area to the wind and current

the vessel's draft is increased, thus increasing the vessel's wetted surface area

the vessel is trimmed by the stern

Question 1 / 270705eccef9fbacbc34ba4d469cc

Question 1 of 270705eccef9fbacbc34ba4d469cc

Adverse effects due to free surface will result when __________.

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Question 1 of 27070

Adverse effects due to free surface will result when __________.