Question 3501 Deck General

70% to pass

In observing rig motion while under tow, the period of roll is the time difference between _______________.

A full inclination on one side to full inclination on the other side
B full inclination on one side to the next full inclination on the same side
C zero inclination to full inclination on one side
D zero inclination to the next zero inclination
AI Explanation

The correct answer is B) full inclination on one side to the next full inclination on the same side. This is because the period of roll refers to the time it takes for the rig or vessel to complete one full cycle of rolling from one side to the other and back again. The time difference between two successive full inclinations on the same side represents one complete rolling period. The other answer choices are incorrect because they do not accurately capture the definition of the period of roll. Option A measures the time between full inclinations on opposite sides, option C measures from zero to full inclination, and option D measures between successive zero inclinations, none of which properly define the rolling period.

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