Question 3387 Deck General

70% 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 _______________.

A equal to the weight of the riser

B applied at the riser tensioner sheaves

C zero

D dependent on the water depth

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.

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