If the bearings of a piece of machinery are fed by a gravity feed lubricating oil system, what statement is true?

Correct Answer: Option A — The lube oil pump draws a suction on the lube oil reservoir/sump and discharges to the lube oil gravity tank. The oil then gravity feeds the bearings and the return oil drains to the lube oil reservoir/sump.

Gravity-feed systems utilize a pump to lift oil from the sump to an elevated gravity tank. This tank provides a constant, reliable head pressure to the bearings. The oil then drains back to the sump by gravity, completing the cycle while ensuring consistent lubrication regardless of pump fluctuations.