A jack-up level at 12.5 feet draft transfers...

Study

Question 1 of 2066636ee728f7522a1c517ea5

A jack-up level at 12.5 feet draft transfers 100 kips of drill water from a tank with a TCG of -30 feet to a starboard tank with a TCG of 70 feet. The resulting starboard draft is 13 feet. The moment required to change list one inch (MCL1") is __________.

Back

Question 1 of 20

66636ee728f7522a1c517ea5

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

• Transverse shift of weight and its effect on list (heeling moment = weight × transverse distance shifted) • Relationship between moment to change list 1 inch (MCL1"), total displacement, and change in list for a given transferred weight • How to convert between inches of heel at the waterline and moment in foot-kips

💭 Think About

• First, calculate the transverse distance the 100-kip weight effectively moves when it is transferred from the port tank to the starboard tank. How many feet is that? • Next, find the heeling moment created by that weight shift. Then relate that moment to the resulting change in list in inches at the waterline (going from level to the new draft difference). • From that, determine how many foot-kips of moment are needed to produce one inch of list, based on the total observed list and the moment you just calculated.

✅ Before You Answer

• Be sure you are using the correct transverse distance: from -30 feet to +70 feet is not 40 feet; check the total span carefully. • Confirm that the change in draft from port to starboard corresponds to a 0.5-foot (6-inch) difference, and relate that to how many inches of list at the waterline occurred due to the transfer. • Verify that your final MCL1" has units of foot-kips per inch of list, and that the magnitude is reasonable for a jack-up of this size.

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed