Why should train operators avoid putting their hand in the path of a carbon dioxide fire extinguisher discharge?

Train operators should avoid putting their hand in the path of a carbon dioxide fire extinguisher discharge primarily because it can cause frostbite. Carbon dioxide is stored in a liquid form and, when released, it expands rapidly and cools significantly as it changes from liquid to gas. This rapid cooling can lower the temperature enough to freeze skin and tissues upon contact, leading to frostbite.

Safety protocols emphasize the importance of handling fire extinguishers correctly to prevent injury, and awareness of the extreme cold produced by CO2 discharges is crucial for operator safety during fire emergencies. Understanding this risk helps ensure that operators are cautious when using these extinguishers in various scenarios, particularly in enclosed spaces like train cars, where the risk of severe cold injuries is heightened.