Fire Science

10 - 15 questions on the Fire Protection PE Exam

Fire Science is the engineering fundamentals topic of the Fire Protection PE exam, worth about 10 to 15 questions. It is where heat transfer, combustion chemistry and fire dynamics come together. Section 3 of the Fire Protection PE Textbook reviews the equations you need and, just as importantly, when to use each one.

What the Textbook Covers: Fire Science

This topic is split into three core areas on the NCEES specification:

Heat Transfer

Conduction, convection and radiation — the three mechanisms that move energy in a fire, and how to quantify each.

Fire Chemistry

Combustion reactions, stoichiometry, heat of combustion, and the thermophysical properties that govern how materials burn.

Fire Dynamics

Fire growth and development, heat release rate, fuel load, flame spread, and the behavior of enclosure (compartment) fires including flashover.

A Taste: The Three Modes of Heat Transfer

Conduction follows Fourier’s law — heat flux is proportional to the temperature gradient and the material’s conductivity (q″ = k·ΔT/L). Radiation scales with the fourth power of absolute temperature (q″ = εσT⁴), which is why it dominates in fully developed fires. Convection carries heat with moving gases. The heat release rate (HRR) ties them together and is often called the single most important variable describing a fire.

The textbook shows how these fundamentals feed directly into plume, detection and sprinkler-response calculations elsewhere on the exam.

This is only a preview. The full explanation, diagrams, worked examples and practice problems are in the Fire Protection PE Textbook.

Get the Full Picture

Fire Science underpins nearly every other topic on the exam. Build the foundation with the full study system:

Fire Protection PE Textbook Fire PE Exam Bundle (3 Exams) Online Fire PE Course

FIRE SCIENCE