Question 5090Deck General70% to pass
While drilling loaded as shown in Sample Load Form Number 4 (Drilling), the DEEP DRILLER suffers an unexpected but slowly increasing starboard and forward inclination. The wind and waves are light. This inclination could have been caused by _______________.
AI Explanation
The correct answer is A) ballast tanks equalizing into tank 1S.
This is the correct answer because an unexpected and slowly increasing starboard and forward inclination of the DEEP DRILLER during drilling operations is likely caused by an imbalance in the vessel's ballast system. If the ballast tanks are not properly managed, an unintended transfer of ballast water into a single tank, such as tank 1S, can lead to a change in the vessel's stability and trim, causing the observed inclination.
The other options are incorrect because they do not directly address the root cause of the vessel's inclination. The failure of mooring lines, dumping of mud, or a broken drill string would not typically result in a slow, steady change in the vessel's attitude as described in the scenario.
Related Questions
#5088 After jacking down your liftboat you have an unexpected list. You find that the only cause of this list must be a flooded leg. Raising the flooded leg further would adversely affect the boats stability by _______________.#5089 Among the possible causes of unexpected rapidly increasing inclination of the DEEP DRILLER while on location is _______________.#5091 After jacking down your liftboat you have an unexpected list. You find that the only cause of this list must be a flooded leg. The list caused by a flooded leg means your vessel has a(n) _______________.#5092 Among the possible causes of unexpected rapid increasing inclination of the floating COASTAL DRILLER is _______________.#5093 After jacking down your liftboat you have an unexpected list. You find that the only cause of this list must be a flooded leg. Your next course of action should be to _______________.