Texas Wastewater Class B Practice Exam 2025 - Free Wastewater Class B Practice Questions and Study Guide

The first step a worker should take before entering a confined space is to use an approved monitoring device and check for the presence of dangerous gases. This is crucial because many confined spaces can have hazardous atmospheres that may not be immediately visible or detectable by human senses. Toxic gases, low oxygen levels, and flammable conditions can pose significant risks to health and safety. By conducting this initial monitoring, workers can determine if it is safe to enter or if additional safety measures need to be implemented.

While wearing a safety harness and attaching a lifeline, ventilating the space, and ensuring that all equipment is turned off are essential safety practices, these steps come after verifying that the atmosphere within the confined space is safe. The primary concern is always the potential hazards present in the environment itself. Once a safe assessment of the air quality is made, workers can then proceed with other safety protocols to ensure comprehensive protection while working in confined spaces.