Alabama Fire College Rapid Intervention Crew Practice Exam – Study Guide & Practice Test

When a firefighter's low-pressure alarm sounds, it typically indicates that 25% of the tank's designated capacity remains. This is crucial in ensuring that firefighters have adequate air supply while operating in hazardous environments. The low-pressure alarm serves as a warning signal, allowing personnel to assess their situation and plan an exit strategy before air supply becomes critically low.

The 25% threshold is established to provide a safety margin, ensuring that firefighters have enough air to exit safely and reach a location where they can replenish their supply. This standard is important for maintaining safety and mitigating risks associated with low air supply while performing duties in dangerous conditions. Having this level of awareness and proactive response is essential in emergency service operations, highlighting the importance of equipment and protocols that safeguard firefighters.