A one piece jack assembly consists of a cylinder and what additional component?

In a one-piece jack assembly, the plunger is a critical component that works in conjunction with the cylinder. The cylinder is responsible for housing the hydraulic fluid and provides the necessary pressure when the jack is operated. The plunger moves within this cylinder when force is applied. This movement creates the lifting action that allows the jack to raise loads.

The plunger's design is essential for ensuring a tight seal within the cylinder, preventing fluid leakage and maintaining pressure, which is crucial for safety and effectiveness during operation. It functions as the moving part that extends and retracts to achieve the desired lift, distinguishing it from other components that may not be integral to the basic lifting mechanism of a jack.

By understanding the role of the plunger in the hydraulic system of a jack, it's clear why it is considered the additional component essential to the functioning of a one-piece jack assembly.