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

Correct Answer: Option B — The lower the oil level, the shorter the residence time, and the hotter the oil will be as delivered by the pump.

Residence time is the duration oil remains in the sump for cooling and settling. A lower oil level reduces the volume available for heat dissipation, resulting in shorter residence time and higher discharge temperatures, as the oil is recirculated through the system more frequently without adequate cooling.