🔍 Key Concepts

• flash point definition for fuel oils • difference between flash point, fire point, and auto‑ignition temperature • safe heating limits in storage tanks vs during atomization/transfer

💭 Think About

• Ask yourself: What does flash point actually tell you about the behavior of fuel vapors near a heat source or flame? • Which operation (storage, transfer, atomization, or heater outlet) is most directly related to the risk of vapor ignition above the liquid surface? • In which situation is it most critical to stay a safe margin below the flash point rather than going above it?

✅ Before You Answer

• Verify which choice talks about a maximum/safe upper temperature limit rather than a minimum needed for viscosity/flow. • Check which option clearly relates to tank safety and vapor ignition risk, not just pumping or burning efficiency. • Eliminate any answer that uses flash point to decide how hot the fuel must be for combustion quality or atomization, since that’s a different consideration.