Firefighter I & II Exam Domain Review: Fire Behavior, Suppression, Rescue, and Fireground Operations

Why Domain Mastery Matters

Pro Board/IFSAC Firefighter I & II written examinations are aligned to NFPA 1001, Standard for Fire Fighter Professional Qualifications. Every question on those exams traces back to a job performance requirement (JPR) in that standard. Your goal for this lesson is to identify exactly which domains you already own and which ones need more work before exam day. A score of 75 percent or better in every domain is the benchmark — not just an overall average.

Fire Behavior and Chemistry

Fire needs fuel, heat, and oxygen (the fire triangle) or, more precisely, an uninhibited chain reaction among those elements (the fire tetrahedron). Understanding how fire develops matters because it drives every tactical decision you make.

• Ignition occurs when a fuel-air mixture reaches its ignition temperature and a competent ignition source is present.
• Growth follows as the fire feeds on available fuel and oxygen, producing heat, light, smoke, and combustion gases.
• Flashover is the near-simultaneous ignition of all exposed combustible surfaces in a compartment — a life-safety emergency for any firefighter inside.
• Backdraft happens when a oxygen-deficient, superheated compartment suddenly receives air, causing rapid, explosive combustion. Warning signs include pressurized smoke pushing out around doors, discolored (yellow-brown) smoke, and little or no visible flame.
• Smoke is a fuel — unburned hydrocarbons and other gases that can ignite. Reading smoke (volume, velocity, density, color) is a critical survival skill.

Safety point: Never open a door into a suspected backdraft without first checking door temperature with the back of your hand and cracking the door slowly behind a charged hose line.

Hose Operations, Water Supply, and Fire Streams

Firefighters must know how to advance and operate hose lines, connect to hydrants and apparatus, and select the correct nozzle and stream for the task.

• Friction loss increases as hose length increases, hose diameter decreases, or flow rate increases.
• Nozzle pressure for a smooth-bore nozzle on a handline is typically 50 psi; fog nozzles are often rated at 100 psi — confirm the manufacturer's rating.
• Flow rate from a smooth-bore nozzle is calculated with the formula: Q = 29.7 × d² × √NP, where Q is gallons per minute, d is tip diameter in inches, and NP is nozzle pressure in psi.
• Water supply operations include forward and reverse lays, hydrant connections, and drafting from static sources.

Ladders

Groundladder selection, carry, raise, and placement are tested heavily. Key points:

• The working angle of a ground ladder is approximately 75 degrees (a 1-to-4 ratio: one foot out for every four feet of vertical height).
• Always heel the ladder before raising and after placement.
• Inspect ladders before every use — never use a ladder with visible cracks, bent rails, or missing rungs.
• Aerial and extension ladders must be positioned clear of overhead power lines by the distance required by your department's SOPs and applicable standards.

Safety point: Treat any overhead electrical conductor as energized until confirmed otherwise by the utility company.

Ventilation

Ventilation removes heat, smoke, and combustion gases to improve visibility, reduce fire spread, and protect trapped occupants. Types:

• Vertical (positive or natural): opens the highest point above the fire; most effective with a natural thermal column.
• Horizontal: cross-ventilation through windows or doors.
• Positive-pressure ventilation (PPV): uses a fan to push fresh air in and force smoke out; must be coordinated with attack crews — opening an exhaust outlet before the attack line is in position can accelerate fire spread.

Safety point: Ventilation always requires coordination with the Incident Commander (IC) and the interior attack crew.

Forcible Entry

Force only what you must, and try before you pry. Common methods include:

• Conventional (door or window breach with irons or Halligan tool).
• Through-the-lock (cylinder removal to operate the lock mechanism).
• Breaking glass: use tempered-glass tools safely, stand aside from the glass plane, and protect interior occupants from falling glass.

Search and Rescue

• Primary search: rapid, systematic search of the most threatened areas while fire is still active — typically done in full PPE with SCBA.
• Secondary search: thorough, slower search after the fire is controlled.
• Size-up a room by staying low, communicating continuously on radio, and maintaining contact with walls or a tag line.
• LUNAR (Location, Unit, Name, Assignment, Resources needed) is the mayday transmission format.

Safety point: Always activate your PASS device if you become lost or entrapped, and never remove your SCBA facepiece inside a structure.

Incident Command

The National Incident Management System (NIMS) and Incident Command System (ICS) provide the framework for all fireground operations. Key Firefighter I & II concepts:

• Unity of command: each responder reports to one supervisor.
• Span of control: one supervisor typically manages three to seven people.
• Accountability: personnel accountability systems (PAR, passport, tags) track who is in the hazard zone at all times.
• Mayday procedures, rapid intervention teams (RIT/RIC), and rehabilitation are ICS functions the Firefighter II must understand.

Using Your Gap-Analysis Worksheet

After the 100-question diagnostic, map your score by domain. Any domain below 75 percent is a priority. Use your flashcard sets to drill definitions and formulas, then return to IFSTA Essentials chapters that cover your weak areas. A targeted remediation plan — not random review — is what separates candidates who pass on the first attempt from those who do not.