Question 174Motor Plants - QMED

The correct answer is D) positive displacement type. Lube oil pumps taking suction from the sump of most small marine engines are typically positive displacement type pumps. This is because positive displacement pumps are well-suited for low-flow, high-pressure applications such as engine lubrication systems. They can generate the necessary pressure to circulate the lubricating oil through the engine's components, even when the oil is drawn directly from the engine sump. The other options are not the typical choice for this application. Diaphragm and eductor-type pumps are not commonly used for engine lubrication, while centrifugal pumps are better suited for higher-flow, lower-pressure systems.