The flash point is defined as what temperature related to fuel oil?

The flash point is defined as the lowest temperature at which the vapors of a fuel oil can ignite when exposed to an ignition source. This measurement is crucial because it indicates the safety and handling characteristics of the fuel oil. At temperatures below the flash point, there are insufficient vapors for combustion, which means the risk of ignition is significantly lower. Knowing the flash point of a fuel oil helps in determining safe storage conditions and handling procedures to prevent fire hazards. In essence, recognizing the flash point allows operators and engineers to manage fuel oils safely and understand their behavior in various temperature scenarios.