5.6: Review
- Page ID
- 66708
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- What is pyrolysis, and why is it necessary for most solid fuels such as wood and plastics to burn?
- Describe the four phases of fire development (incipient, growth, fully developed, and decay) and explain what characterizes each phase.
- How does the surface-to-mass ratio of a fuel influence ignition and fire growth? Provide an example of a fuel with a high surface-to-mass ratio.
- What is the difference between thermally thick and thermally thin materials, and how does thermal inertia affect a fuel’s ignition characteristics?
- How do fuel orientation and geometry influence flame spread and overall fire behavior? Give an example of how changing a fuel's orientation can affect its burning rate.
- Why are dust explosions and combustible metal fires considered especially hazardous, and what factors make these incidents difficult for firefighters to manage safely?


