Which of the following is essential for safe operation in confined spaces?

In confined spaces, safety is paramount due to potential hazards such as toxic gases, insufficient oxygen, and the risk of entrapment. Regular air quality testing is essential, as it helps to identify harmful atmospheric conditions before workers enter the space. This includes assessing levels of oxygen, as well as the presence of any toxic gases or vapors that could pose a serious threat to health and safety.

The presence of a rescue team is equally important, as it provides immediate response capability in case of an emergency. Workers might encounter situations where immediate extraction from the confined space is necessary, and having a trained rescue team on standby is crucial to ensure a swift response to any incidents.

While monitoring of temperature is relevant in certain contexts, it does not directly address the fundamental safety concerns associated with confined spaces. Therefore, the combination of regular air quality testing and the presence of a rescue team is essential for ensuring safe operations in such environments. This combination (B and C) effectively prepares workers and enhances their safety while minimizing risks associated with confined space entry.