Which of the following types of bearing lubrication schemes can carry the highest unit loading?

Correct Answer: Option C — Pressure lubricated

Pressure lubrication systems utilize a pump to force oil into the bearing clearance, ensuring a continuous, high-pressure hydrodynamic film. This forced supply allows for higher unit loading and better heat dissipation compared to gravity-fed methods like ring or disk lubrication, which rely on slower, passive oil distribution mechanisms.