Bilge keels are more effective at dampening...

Question 1 / 2707066636eec28f7522a1c51c034

Question 1 of 2707066636eec28f7522a1c51c034

Bilge keels are more effective at dampening rolls under which condition?

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Question 1 of 27070

Q

Bilge keels are more effective at dampening rolls under which condition?

🔍 Key Concepts

• Bilge keels purpose and how they interact with water during a roll • Difference between rolling (side-to-side) and pitching (bow-up/bow-down) motions • How immersion depth/draft affects the bilge keel’s contact with the water

💭 Think About

• Think about which ship motion causes the bilge keel to move sideways through the water and create the most resistance. • Consider whether bilge keels work better when they are more or less submerged in the water. • Ask yourself: does a list (constant lean to one side) help or hurt the bilge keel’s ability to oppose rolling motion?

✅ Before You Answer

• Make sure you understand that bilge keels mainly resist rolling, not pitching. • Check which option would place more bilge keel area effectively in the water and increase hydrodynamic resistance during roll. • Eliminate any choices that relate to motions or conditions where the bilge keels aren’t doing much work.

Question 1 of 27070

Q

Bilge keels are more effective at dampening rolls under which condition?

A

Rolling increases

B

Pitching increases

C

Draft decreases

D

List increases

Question 1 / 2707066636eec28f7522a1c51c034

Question 1 of 2707066636eec28f7522a1c51c034

Bilge keels are more effective at dampening rolls under which condition?

Back

Question 1 of 27070

Q

Bilge keels are more effective at dampening rolls under which condition?

🔍 Key Concepts

• Bilge keels purpose and how they interact with water during a roll • Difference between rolling (side-to-side) and pitching (bow-up/bow-down) motions • How immersion depth/draft affects the bilge keel’s contact with the water

💭 Think About

• Think about which ship motion causes the bilge keel to move sideways through the water and create the most resistance. • Consider whether bilge keels work better when they are more or less submerged in the water. • Ask yourself: does a list (constant lean to one side) help or hurt the bilge keel’s ability to oppose rolling motion?

✅ Before You Answer

• Make sure you understand that bilge keels mainly resist rolling, not pitching. • Check which option would place more bilge keel area effectively in the water and increase hydrodynamic resistance during roll. • Eliminate any choices that relate to motions or conditions where the bilge keels aren’t doing much work.