Which of the following practices is considered a confined space hazard control?

The practice considered a confined space hazard control involves ensuring that any potential hazards have been effectively managed before entry. Bleeding refers to the process of releasing pressure from a system. This can be crucial in confined space operations, especially when working with pipes or vessels that could contain pressurized materials. By bleeding systems, workers can reduce the risk of sudden releases of hazardous substances, thereby mitigating potential dangers associated with pressure that could lead to injury or exposure to harmful materials.

In the context of confined space safety, controlling hazards is paramount, and proper management of pressure is a key aspect of ensuring a safe working environment. Other practices, while important in the realm of safety and operations, do not specifically qualify as direct hazard controls in the same way that bleeding does. For example, lockout is primarily about ensuring energy sources are disabled, isolation can refer to separating systems or equipment, and flushing is more about cleaning or clearing lines rather than directly addressing safety hazards present in confined spaces.