Under what condition do liquid-fuel tools pose a higher fire risk?

Under what condition do liquid-fuel tools pose a higher fire risk?

• A. Tool is cold
• B. Fuel is full
• C. Flammable fuel vapor comes into contact with the hot tool
• D. Tool is off

Answer: (C)

Fire risk with liquid-fuel tools comes from flammable fuel vapors meeting a hot surface. When the tool is heated, the liquid fuel vaporizes and mixes with air. If those vapors come into contact with the hot nozzle or heating element, they can ignite, causing a flame or flashback. If the tool is cold or turned off, there isn’t enough heat to create or ignite the vapors. A full tank can raise the amount of fuel available, but without the heat to vaporize and ignite it, the immediate fire risk is not at its peak. So the critical condition is vapor coming into contact with the hot tool.

Fire risk with liquid-fuel tools comes from flammable fuel vapors meeting a hot surface. When the tool is heated, the liquid fuel vaporizes and mixes with air. If those vapors come into contact with the hot nozzle or heating element, they can ignite, causing a flame or flashback. If the tool is cold or turned off, there isn’t enough heat to create or ignite the vapors. A full tank can raise the amount of fuel available, but without the heat to vaporize and ignite it, the immediate fire risk is not at its peak. So the critical condition is vapor coming into contact with the hot tool.