Question 4493 Deck General
70% to passWhile on an ocean tow, the COASTAL DRILLER is threatened with the approach of a severe storm. Including the time required to place the generators on-line, the approximate time required to lower the legs from a TOC (tip-of-can) position of 12.38 feet to 60.5 feet is _______________.
The correct answer is D) 47 minutes. The explanation for this is: 1) The time required to lower the legs from a TOC (tip-of-can) position of 12.38 feet to 60.5 feet is approximately 47 minutes, including the time required to place the generators on-line. 2) This is based on the typical lowering rate of offshore jack-up rigs, which is around 1 foot per minute. Given the leg extension of 48.12 feet (60.5 - 12.38), the total time required would be around 47-48 minutes. 3) The other options are incorrect because they do not accurately reflect the typical time required for this operation. 4) The key is understanding the typical leg lowering rate for offshore jack-up rigs and applying it to the given leg extension distance.
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