🔍 Key Concepts

• Methods of heat transfer: conduction, convection, and radiation • How heat moves through solid structures like bulkheads versus through air or gases • Difference between heat coming through the bulkhead and heat coming from the bulkhead surface

💭 Think About

• Ask yourself: if the combustible material is next to (outside) the fire compartment, what part is actually receiving the heat—the material or the separating bulkhead first? • Consider which heat transfer method can act through the bulkhead and which acts across open space from one surface to another. • Think about what physically causes the distant combustible material to reach its ignition temperature in this situation.

✅ Before You Answer

• Identify which choice correctly describes radiation vs conduction vs convection in plain language. • Check which option describes heat being transferred through the bulkhead and then re-emitted to nearby materials. • Eliminate any option that suggests convection or movement of hot gases through a solid bulkhead without openings.