NEIEP Installing and Servicing Jacks (805) Practice Test

The function of a jack's handle is to manually pump or operate the hydraulic mechanism to lift the vehicle. This handle is crucial as it provides the user with the necessary leverage and mechanical advantage to raise the jack, which, in turn, elevates the vehicle. When the handle is pumped up and down, it moves the hydraulic fluid within the system, creating pressure that lifts the lifting arm and ultimately the load it supports.

This manual operation is vital for safety and effectiveness, allowing the user to control the lifting process precisely. Understanding the role of the handle is important for effective jack usage, as improper operation could lead to lift failure or safety hazards.