🔍 Key Concepts

• Spontaneous combustion vs. ignition from an external heat source • How oil-soaked materials can heat up on their own during drying/oxidation • Difference between an overloaded electrical circuit (spark/overheating) and true spontaneous combustion

💭 Think About

• Which choice involves heat building up inside the material itself without any spark, flame, or outside heat source? • What happens when certain drying oils (like linseed oil) are absorbed into rags and piled together in a confined space? • Which options describe common fire causes, but not true spontaneous combustion by chemical self-heating?

✅ Before You Answer

• Verify which materials are known on board for self-heating and oxidation that can lead to fire with no external flame • Check which options involve a mechanical or electrical fault rather than self-heating of stored material • Confirm which housekeeping practice (how you store used rags/cleaning gear) is emphasized in fire-prevention training for spontaneous combustion risks