GPSTC Accident Reporting Practice Exam - Prep & Study Guide

Using dirt to extinguish a tire fire can be effective because the earth can smother the flames by cutting off the oxygen supply that fuels the fire. When dirt is applied to a burning tire, it covers the flames and prevents oxygen from reaching them, which is a key factor in fire behavior. This method can help to suffocate the fire, making it less likely to continue burning or to spread.

In contrast, while sand can also help to smother a fire, it may not be as effective as dirt since sand can sometimes be too fine and may not provide enough coverage to completely eliminate the oxygen. Smothering a fire with a blanket is not advisable with burning tires due to the high heat and potential for the blanket to catch fire itself. Leaving a tire fire unattended is dangerous and poses a risk of escalation, as well as creating hazards for nearby people and property.