Question 4986Deck General70% to pass
What is the change in the vertical moments (excluding free surface effects) for the COASTAL DRILLER if 2.0 feet of drill water is transferred from a full drill water tank 23 to an empty drill water tank 6?
AI Explanation
The correct answer is C) -253 foot-kips.
When 2.0 feet of drill water is transferred from a full drill water tank 23 to an empty drill water tank 6, the vertical moment decreases by 253 foot-kips. This is because the weight of the drill water is being moved downward, resulting in a negative change in the vertical moment (excluding free surface effects).
The other options are incorrect because:
A) 253 foot-kips is the absolute value of the change, not the actual change.
B) 56 foot-kips is incorrect as it does not account for the downward movement of the weight.
D) -411 foot-kips is incorrect as it does not correctly calculate the change in vertical moment.
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