In a forced-feed lubrication system, what statement is true concerning lube oil reservoir/sump residence time?

Correct Answer: Option B — The higher the oil level, the longer the residence time, and the cooler the oil will be as delivered by the pump.

Residence time in the sump allows oil to dissipate heat and settle out contaminants. A higher oil level increases the volume of the reservoir, providing more time for the oil to cool before being drawn back into the pump, which improves the overall thermal efficiency of the forced-feed lubrication system.