Question 134General Subjects - 1st Asst/Chief

The correct answer is B) The lower the oil level, the shorter the residence time, and the hotter the oil will be as delivered by the pump. In a forced-feed lubrication system, the residence time of the lube oil in the reservoir/sump is inversely proportional to the oil level. When the oil level is lower, the oil has less volume to reside in the sump, resulting in a shorter residence time. This shorter residence time means the oil spends less time in the sump being cooled, resulting in the oil being hotter as it is delivered by the pump. The other options are incorrect because they do not accurately describe the relationship between oil level, residence time, and delivered oil temperature in a forced-feed lubrication system.