What is the primary function of the 45-minute and 30-minute air cylinders?

The primary function of the 45-minute and 30-minute air cylinders is to provide a breathing air supply for firefighters and other responders operating in environments where the air quality may be compromised. These cylinders are designed to deliver a specific amount of breathable air to support individuals during firefighting operations, rescue missions, or in any situation where there is a presence of smoke, toxic gases, or insufficient oxygen levels.

Firefighters rely on these air cylinders to ensure their safety and effectiveness while engaging in life-saving actions, allowing them to work in hazardous conditions without the immediate threat of inhaling dangerous substances or suffering from asphyxiation. This functionality is vital for maintaining operational readiness and developing tactical plans when facing incidents that involve a significant risk to respiratory health.

In contrast, the other options relate to different aspects of emergency response. Decontamination supplies are used to clean equipment or personnel after exposure to hazardous materials, the transport of hazardous materials focuses on moving dangerous substances safely, and detection of hazardous substances involves identifying the presence of harmful agents in the environment. However, none of these functions address the critical need for a reliable air supply that the air cylinders provide.