Fire Officer Cadet Exam cheat sheet

The incident command system establishes a single, unambiguous Incident Commander (IC); command may be transferred, but only through a formal face-to-face or radio briefing that states the transfer explicitly.

Span of control: an effective supervisory ratio is commonly 3 to 7 reporting elements, with 5 as the working target; exceed it and the IC must delegate by creating divisions, groups, or branches.

Sectors are geographic (Division A/B/C/D, floors, sides of a building); groups are functional (ventilation, salvage, medical, safety, fire attack); branches group sectors/groups under a supervisor.

Benchmarks in sequence: water on fire, primary search complete/all clear, fire knocked down, secondary search complete, fire under control, loss stopped.

A PAR (personnel accountability report) is a roll-call confirmation of every crew's status; it is triggered by a Mayday, a change from offensive to defensive strategy, a building collapse, or a sudden hazardous event.

Strategy precedes tactics: offensive (interior, life safety priority), defensive (exterior, protect exposures), or transitional; the IC must announce the strategy change on the radio.

A Mayday call carries priority over all other radio traffic; the IC assigns a dedicated Rescue Group and a separate Mayday IC or radio channel so command is not overloaded.

Post-incident: the IC remains responsible for scene security, evidence preservation, rekindle watch, and a structured after-action review before crews are released.

Fire tetrahedron: fuel, oxygen (oxidizer), heat, and the uninhibited chemical chain reaction; removing any one element extinguishes combustion.

Flash point is the lowest temperature at which a liquid gives off sufficient vapour to ignite momentarily; fire point is the temperature at which vapour burns continuously once ignited.

Flammable liquid: flash point below 37.8 °C (100 °F); combustible liquid: flash point at or above 37.8 °C; these thresholds drive storage and response rules.

Lower explosive limit (LEL) and upper explosive limit (UEL) bracket the flammable range; below the LEL the mixture is too lean, above the UEL too rich, but a rich atmosphere can become explosive as it dilutes.

Heat release rate (HRR) in kW or MW describes fire growth; a room-and-contents fire typically reaches flashover in the 500 kW to 1 MW range, while a single burning armchair may peak near 1–2 MW.

Conduction transfers heat through direct contact within a solid; convection moves heat by fluid flow (hot smoke and gases); radiation transfers heat by electromagnetic waves and is line-of-sight.

Specific heat capacity and thermal conductivity determine how quickly a material absorbs heat; steel conducts and loses strength at high temperature, while concrete spalls and insulates.

Smoke is a fuel: unburned pyrolysis products (carbon monoxide, hydrogen cyanide, hydrocarbons) can ignite as a smoke explosion when mixed with air and an ignition source.

Flashover: transition to total surface involvement of the compartment; warning signs include high heat, rollover of flames in the smoke layer, and autoignition of contents; cooling the gas layer is the countermeasure.

Backdraught (backdraft): oxygen-starved fire admits air and deflagrates; indicators are smoke-stained windows, pulsing smoke, and inward air movement; control by vertical ventilation before entry.

Smoke explosion occurs when a pre-mixed flammable smoke/air mixture ignites ahead of the fire; it is not the same as backdraught and is countered by cooling gases and controlled ventilation.

Firefighting tactics follow the priority order: rescue, exposures, confinement, extinguishment, overhaul, ventilation, salvage (RECEO-VS).

Ventilation is coordinated with attack: venting before water is on the fire can accelerate growth; venting after attack improves visibility and reduces flashover risk.

Water application: a fog or straight stream at the seat of the fire; the '3D' or gas-cooling pulse technique uses short bursts of fog into the hot gas layer to reduce temperature without pushing fire.

Search priority: most severely threatened, then the remainder; primary search is fast and oriented to known and likely victim locations; secondary search is thorough and occurs after fire control.

Overhaul exposes hidden fire: open ceilings, walls, and voids; use thermal imaging; wet down and remove charred material; the goal is to prevent rekindle before leaving the scene.

Type I fire-resistive: structural members are noncombustible and protected (concrete/steel with fireproofing); typical high-rise; resists collapse but traps heat and smoke.

Type II noncombustible: noncombustible structural members without fire-resistive protection; common in commercial/warehouse; steel may fail rapidly when heated.

Type III ordinary: exterior walls of noncombustible masonry, interior structural members of combustible wood; older schools and commercial buildings; concealed voids hide fire spread.

Type IV heavy timber: massive wood members (typically 8 in / 200 mm minimum nominal dimension); chars slowly and retains strength; common in mills and older warehouses.

Type V wood frame: combustible structural members throughout; dominant in low-rise residential; rapid collapse and fire spread through concealed spaces.

Lightweight construction (engineered wood I-joists, trusses, thin steel C-joists) fails quickly under fire; treat floors and roofs as suspect and avoid operating beneath them.

Five-step building size-up: construction, occupancy, contents, life safety, and fire involvement; note the building's age, renovations, and previous damage.

Green building features (photovoltaic arrays, lightweight systems, foam insulation) create unfamiliar hazards: energized roof panels, hidden fire in insulation, and rapid structural failure.

Sprinkler systems: wet pipe (most common, water always in pipes), dry pipe (air/nitrogen held, water released on activation), pre-action (double interlock), and deluge (open heads, all flow at once).

Sprinkler head activation temperature is set by the fusible link rating: 68 °C (155 °F) is standard for ordinary occupancy; higher ratings for high-temperature environments.

Sprinkler design density (gpm/ft² or mm/min) and design area are selected by occupancy hazard: light, ordinary, extra hazard; a single head typically protects 9–12 m².

Standpipe systems: Class I (2.5 in/65 mm for fire department), Class II (1.5 in/38 mm for occupants), Class III (both); a dry standpipe requires the pumper to supply water at the fire department connection.

Fire alarm signalling: conventional zones vs addressable devices; a supervisory signal indicates a system fault (valve closed, low air), distinct from an alarm or trouble signal.

Fire safety design: passive measures (compartmentation, fire doors, protected escape routes) and active measures (detection, suppression, smoke control) together provide life safety.

Fire doors must be self-closing and latched; hold-open devices must release on alarm; propping a fire door open defeats compartmentation and is a common inspection finding.

Rescue priorities: locate, access, stabilize, disentangle/extricate, and transfer to medical care; scene safety and hazard control precede victim contact.

Vehicle extrication: stabilize the vehicle (chocks, cribbing, struts), disconnect the battery, then gain access (door displacement, roof removal, dash roll) using hydraulic cutters and spreaders.

Hybrid and electric vehicles: high-voltage cables are typically orange; do not cut them; identify the battery location and follow the manufacturer's emergency response guide.

Confined space: permit-required spaces have limited entry/exit, are not designed for occupancy, and may contain hazardous atmosphere; entry requires atmospheric testing, ventilation, attendant, and rescue plan.

Rope rescue: anchor systems must be rated to a safety factor (often 10:1 for life safety); use a mainline and belay; the lowering system must be capable of holding the load if the mainline fails.

Trench rescue: soil is heavy and unstable; shoring and shielding are required before entry; spoil piles, vibrations, and water increase collapse risk.

Water rescue: reach, throw, row, go - the last option is for trained rescuers only; personal flotation and a tether are required for any in-water operation.

Structural collapse: void spaces near heavy furniture and load-bearing walls are likely survivor locations; shoring, lifting, and search dogs or listening devices guide the search.

Hazmat recognition clues: occupancy and location, container shape and labels, placards, shipping papers, odours, vapour clouds, and dead vegetation or wildlife.

ERG (Emergency Response Guidebook) use: identify the material, find the guide number (yellow pages by UN number, blue by name), then use the orange guide for protective actions and isolation distances.

Placard classes: Class 1 explosives, 2 gases, 3 flammable liquids, 4 flammable solids, 5 oxidizers, 6 toxic, 7 radioactive, 8 corrosive, 9 miscellaneous.

Defensive operations: isolation, evacuation or shelter-in-place, diking and damming, and containment; offensive (product control) requires trained hazmat technicians with PPE.

Atmospheric monitoring: oxygen (19.5–23.5 %), flammability (% LEL), and toxicity (CO, H2S, etc.) must be tested before and during entry; a reading at 10 % LEL is a common evacuation trigger.

Chemical protective clothing: Level A (fully encapsulating, SCBA), Level B (splash protection, SCBA), Level C (air-purifying respirator), Level D (work uniform); the level is set by the hazard assessment.

Decontamination: establish a contamination reduction corridor with hot, warm, and cold zones; gross decon precedes technical decon; all personnel and equipment leaving the hot zone must be decontaminated.

Special service incidents include elevator entrapment, electrical hazards, and natural gas leaks; gas leaks require elimination of ignition sources, isolation, and utility control.

Leadership styles: autocratic (emergency, immediate compliance), democratic (planning, buy-in), and laissez-faire (delegated, experienced crews); the style must match the situation.

Situational leadership: adjust direction and support to follower readiness; a new firefighter needs clear task direction, while an experienced crew can be delegated to with outcome-based control.

The crew resource management (CRM) model: brief before, monitor during, debrief after; encourage assertiveness and challenge to authority when safety is at risk.

Accountability: every crew has a designated leader and a portable radio; the leader maintains a roll-call list and reports status at benchmarks and on request.

Discipline and correction: address performance privately, specifically, and promptly; document formal action; separate the behaviour from the person and focus on standards.

Motivation and retention: recognition, fair scheduling, training opportunity, and clear promotion pathways reduce turnover; unresolved grievances escalate.

Delegation requires clear task, authority, resources, and reporting expectations; a delegated task remains the leader's accountability.

Ethical leadership: model the standard, avoid favouritism, and disclose conflicts of interest; leaders are judged by consistency between stated values and observed behaviour.

Firefighter cancer risk: combustion products contaminate PPE; use SCBA throughout overhaul, do gross decon on scene, bag PPE, and wash it separately from household laundry.

Rehabilitation: after a working period or when PPE is worn, provide rest, hydration, and cooling; a common rule is to rehab after 45 minutes of strenuous work or two SCBA cylinders.

Heat illness: heat cramps (salt/fluid loss), heat exhaustion (weakness, dizziness, heavy sweating), heat stroke (altered mental status, hot skin, no sweating); heat stroke is a medical emergency.

Cardiac events are a leading cause of on-duty firefighter death; annual medical evaluation, fitness programs, and early recognition of chest pain save lives.

SCBA safety: use the 1/3 rule for entry (one-third to enter, one-third to exit, one-third reserve); never rely on a low-air alarm as the exit trigger.

Rapid intervention: a dedicated RIT/FAST team of at least two members is staged for every interior operation; the team must be equipped and briefed before entry.

Behavioural health: cumulative trauma, sleep disruption, and substance use require peer support and confidential access to employee assistance programs.

Safety culture: report near-misses without blame; investigate all injuries; near-miss reporting is a leading indicator that prevents serious events.

Occupational health and safety law imposes a general duty on employers to provide a safe workplace and on workers to take reasonable care; a fire officer enforces both sides.

Codes and standards: model codes (e.g., International Fire Code, NFPA 1) are adopted by local ordinance and become enforceable law only through adoption.

Standard of care: the fire service owes a duty of care when it acts; negligence requires a duty, a breach, causation, and damages.

Records and reports: incident reports may become legal evidence; write contemporaneously, factually, and without speculation; retain per the applicable retention schedule.

Privacy and confidentiality: medical and personal information gathered at incidents is protected; disclose only to those with a need to know.

Conflict of interest: a fire officer must disclose and avoid situations where personal interest could influence official decisions, including procurement and inspection.

Due process in discipline: give notice of the allegation, an opportunity to respond, and a fair hearing; follow the collective agreement and applicable employment law.

Whistleblowing and duty to report: report unsafe practices or unlawful conduct through the established chain; retaliation against a good-faith reporter is prohibited.

Radio discipline: identify unit and addressee, keep transmissions brief, use plain language, and acknowledge orders with a repeat-back when the message is critical.

The communication loop: sender encodes, receiver decodes, receiver confirms; feedback is the step that prevents misunderstood orders at an incident.

Incident radio reports follow a standard order: unit identification, location, conditions, actions, and needs (CAN report: conditions, actions, needs).

Public information: a single designated Public Information Officer speaks for the organization; operational personnel refer media enquiries to the PIO.

Community risk reduction: smoke alarm programs, home safety visits, school education, and business inspections reduce demand; target the highest-risk neighbourhoods first.

Difficult conversations: use 'I' statements, describe observable behaviour, state the impact, and agree on a specific action; avoid public criticism of a subordinate.

Cross-cultural and language barriers: use interpreters, pictorial materials, and plain language; check understanding rather than assuming it.

Social media: official accounts only; personal posts must not disclose incident details, victim information, or operational security.

Training needs analysis: identify the gap between required and current competence at organisational, task, and individual levels before designing training.

Learning objectives use observable action verbs and state the condition and standard (e.g., 'don SCBA and complete a walk test within 60 seconds').

Assessment methods: written knowledge tests, practical skills checklists, scenario evaluation, and observed performance on the job; each must match the objective.

Competency-based training records should document date, task, evaluator, result, and any remedial action; records support promotion and legal defence.

Skill decay: hands-on skills degrade without practice; set refresher intervals (e.g., annual live-fire and SCBA drills) and document them.

Instructional method selection: demonstration for psychomotor skills, discussion for decision-making, and simulation for multi-agency command training.

Feedback after assessment should be specific, timely, and behaviour-focused; the debrief is a learning event, not a disciplinary hearing.

Mentoring and succession: pair probationary firefighters with trained mentors and rotate assignments to build breadth for promotion.