What can cause an oxygen deficiency in a confined space?

Oxygen deficiency in a confined space can occur due to the displacement of oxygen by other gases. When other gases such as carbon dioxide, nitrogen, or various industrial gases are present, they may take up space in the atmosphere, effectively reducing the concentration of oxygen available for breathing. This can happen during various operations, such as welding, cutting, or other industrial processes that involve gas usage or combustion.

Understanding that oxygen levels must remain within a safe range is crucial for anyone working in or around confined spaces. Monitoring and maintaining proper ventilation is essential to ensure that displaced gases do not pose a risk of creating an oxygen-deficient environment. Thus, recognizing the impact of gas displacement is vital for safety and compliance with health regulations in confined space scenarios. The other options, while they can affect conditions within a confined space, do not directly lead to a reduction in oxygen levels.