Some spaces protected by fixed carbon dioxide systems are required to have audible alarms that begin sounding prior to the discharge of CO2. This time delay must be at least __________.
• Fixed CO₂ fire extinguishing systems and what the gas does to oxygen levels in a space • Purpose of a pre‑discharge time delay and alarm for personnel safety • Regulatory idea that the delay must be long enough for people to evacuate and secure the space but not so long that it endangers fire control
• Think about how quickly a person working deep inside a machinery space or cargo space might realistically need to hear an alarm, recognize it, and reach an exit in an emergency. • Consider what could happen if the delay is too short versus too long: which options might be unreasonably short for escape, and which might allow a fire to grow too much? • Compare the answer choices to a typical, practical evacuation time for a small to medium enclosed machinery space.
• Compare each time option to the time it takes to recognize the alarm + start moving + actually exit an enclosed space. • Ask yourself which answer choices are clearly excessive for a fire emergency time delay (would seriously delay CO₂ discharge). • Eliminate any option that seems too short for safe evacuation yet is still being treated as a required minimum delay.
No comments yet
Be the first to share your thoughts!