Question 4747Deck General70% to pass
A virtual rise in the center of gravity of a MODU may be caused by _______________.
AI Explanation
The correct answer is D) using an on board crane to lift a freely swinging heavy object.
The reason this is correct is that when a heavy object is lifted by a crane, the object's center of gravity rises, which in turn raises the overall center of gravity of the Mobile Offshore Drilling Unit (MODU). This change in the center of gravity can affect the MODU's stability and must be accounted for during operations.
The other options are incorrect because transferring pipe (A) or filling/emptying a tank (B, C) would not directly affect the center of gravity in the same way as lifting a heavy object with a crane (D).
Related Questions
#4745 Semisubmersibles A and B are identical. However, "A" is more tender than "B". This means that "A" relative to "B" has a _______________.#4746 On a semisubmersible drilling unit, decreasing riser tension increases _______________.#4748 A semisubmersible which flops between forward and aft trim angles is likely to have _______________.#4749 An inclined semisubmersible with a very short rolling period about a constant angle of list is likely to have _______________.#4750 The angle of loll is a stability term which applies to a floating MODU with _______________.