Lubrication systems that use a pump are referred to as ___________ systems.

Lubrication systems that employ a pump are classified as pressure systems. This classification arises from the way the pump actively forces lubricant through the engine or machinery components to ensure adequate lubrication. In these systems, the pump maintains a continual flow of lubricant, which is critical for high-performance engines or machinery operating at elevated speeds or loads where splashing or dripping alone may not suffice.

Pressure lubrication systems are designed to distribute oil evenly to critical areas, reducing friction and wear effectively. The ability to maintain pressure ensures that oil reaches hard-to-access areas rapidly and reliably, which is essential for maintaining the machinery's operational efficiency and longevity.

Other lubrication methods—such as drip, vacuum, or splash systems—do not rely on pumps but instead use gravity or other means to supply lubricant, which may not be adequate under certain conditions, particularly when high-pressure lubrication is required.