Construction Health and Safety Technician (CHST) Practice Test 2026 - Free CHST Practice Questions and Study Guide

A "warning line system" is conventionally defined as an erected barrier on a rooftop that serves to warn workers they are approaching an unprotected side or edge. This system is a critical component of fall protection in construction and other industries where workers are exposed to the risk of falling from elevated surfaces.

The warning line typically consists of ropes, wires, or chains that are set up to delineate the perimeter of the area where workers can safely operate without the risk of falling off an edge. By visually demarcating these areas, the warning line system helps to alert workers to the hazards associated with being near unprotected sides or edges, thereby enhancing safety and preventing falls.

Other options describe different safety measures but are not the specific purpose of a warning line system. For example, a marked path indicating safe walking distance from hazards describes pedestrian safety but does not relate to the risk of falling from heights. Similarly, alerting workers of high noise levels pertains to hearing conservation measures, and a designated area for storing safety equipment concerns organization rather than fall protection. Therefore, the function of the warning line system is narrowly focused on addressing fall hazards on rooftops.