Engineering · Diesel — Flash Point
The flash point of a fuel oil is the lowest temperature at which it:
- AWill solidify (pour point)
- BReaches its maximum viscosity
- CGives off enough vapor to form an ignitable mixture with air near its surface✓ Correct
- DAuto-ignites with no external flame
Explanation
Flash point is the lowest temperature at which a fuel gives off vapor that flashes when an ignition source is applied. SOLAS generally requires fuel oil with a flash point not below 60°C. Auto-ignition (no flame) occurs at a separate, higher temperature.
Authority: ASTM D93 (flash point); SOLAS Chapter II-2
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