Question 3387Deck General70% to pass
In anticipation of heavy weather, it is decided to deballast the DEEP DRILLER to survival draft. The marine riser should be disconnected, pulled, and laid down. After doing so, the riser tension will be _______________.
AI Explanation
The correct answer is C) zero.
When the marine riser is disconnected and laid down, the tension on the riser will be zero. This is because the weight of the riser is no longer being supported by the riser tensioner system. Without the riser connected, there is no longer any tension or load being applied to the riser.
The other options are incorrect because: A) the weight of the riser is not being supported, so the tension is not equal to the riser weight; B) the riser tensioner sheaves are not in use since the riser is disconnected; and D) the water depth is not a factor once the riser is disconnected and laid down.
Related Questions
#3385 While a MODU is underway, a look-out must be maintained _______________.#3386 The COASTAL DRILLER is experiencing a single amplitude roll angle of 1 degree and a roll period of 7 seconds. What is the maximum recommended water depth for elevating? #3388 Which shape shown in illustration D016RR below would be displayed by a mobile offshore drilling unit that is being towed more than 200 meters astern of a towing vessel? #3389 The overturning forces acting on a floating jack-up are generally dominated by _______________.#3390 Given the same water depth and line tension, the holding power of a 19 pound/foot wire rope mooring system in comparison to the holding power of a 90 pound/foot chain mooring system will be _______________.