Fireground Operations: Size-Up, Strategy, CRM, and Ventilation Tactics

Comprehensive practice flashcards covering fireground size-up factors, strategic command sequencing (RECEO-VS), Crew Resource Management (CRM), and modern UL/NIST flow path and ventilation principles.

Why is knowing a building's size and exposed area critical for the Incident Commander (IC)?

It assists the IC in determining the amount of water needed for the potential fire flow.

When a building is tightly surrounded by other structures preventing a $360^\text{-degree}$ walk-around, what resource is invaluable for determining its area?

The preplan.

What is always considered the most important factor in fireground size-up?

Life safety; everything else is secondary.

How do trapped citizens typically behave when attempting to escape a burning structure?

They have no protective gear, are untrained to handle fire stress, and will most likely try to exit the building the same way they entered, regardless of danger.

Which building occupants are considered the most endangered during a fire incident?

Those in the immediate vicinity of the fire area and those directly above the fire floor.

How do cellar fires differ from top-floor fires in terms of interior exposure hazards?

In a cellar fire, all floors above are potential interior exposures, whereas a fire on the top floor will not normally pose a severe interior exposure threat to lower floors.

In Philadelphia, what special call signs replace standard engine designations for foam pumpers, elevating booms, large-diameter hose pumpers, and extreme master streams?

Foam pumpers become Foam (e.g., Foam $18$), elevating booms become Squrt (e.g., Squrt $38$), large-diameter hose units become Pipe Line (e.g., Pipe Line $52$), and monitors exceeding $2,000\text{ gpm}$ become Deluge (e.g., Deluge $49$).

What method should volunteer and combination fire departments use to notify the IC of their available on-scene staffing upon response?

The company officer or engineer announces the number of firefighters aboard the unit to Dispatch when acknowledging their response.

What roles can the American Red Cross and the Environmental Protection Agency (EPA) fulfill at an incident?

The Red Cross notifies next of kin, arranges transportation, and provides temporary shelter; the EPA initiates hazardous materials cleanup procedures and engages private contractors.

What roofing construction practice has proven to be a major contributor to conflagrations?

The continued use of wood-shingled roofs.

What structural vulnerability is circled in this image, and what danger does it present during a fire?

An opening in a wall to a previously attached structure; the breakdown of such a fire-stop allows fire to extend directly into the adjoining property.

What three structural construction factors allow fire to spread rapidly between attached or closely spaced buildings?

Interconnected or common areas (such as common attics, cocklofts, or cornices), floor and roof joists abutting in common wall sockets (spreading fire by conduction), and the breakdown of fire-stops in concealed spaces.

At what temperature will wired glass windows fail and drop out if not cooled by protective water streams?

$1600^\text{ }\text{degrees Fahrenheit}$ ($1600^\text{ }\text{F}$).

How did an exterior deluge sprinkler system protect an exposed Bell Telephone building during a major warehouse fire?

A second alarm company pressurized the architect-designed exterior deluge sprinkler system on the 13-story building, which deployed a downward spray that knocked down flame impingement from the fire $20\text{ feet}$ away.

How does hot weather combined with unauthorized hydrant usage complicate municipal firefighting operations?

Children illegally opening hydrants reduces water pressure and overall water availability in the municipal system.

What four built-in suppression systems are classified as auxiliary appliances?

Sprinkler systems, standpipe systems, $\text{CO}_2$ systems, and foam flooding systems.

Why do many communities without aerial ladder trucks restrict the maximum height of buildings to $35\text{ feet}$?

$35\text{ feet}$ coincides with the reach of the longest ground ladder carried by the fire department.

How did ventilation tactics differ for a historic Revolutionary War structure in Germantown compared to the Betsy Ross House?

In Germantown, firefighters had to avoid breaking windows because soldiers carved initials in the glass, whereas the Betsy Ross House building was rebuilt without historic value but its authentic furnishings required salvage protection.

Why do nighttime residential fires place the heaviest operational tax on firefighters?

Firefighters encounter more locked doors requiring forcible entry, restricted vision from darkness, and the moral urgency to push deeper and stay longer listening for distressed occupants such as children.

What are the definitions of Strategy, Tactics, and Tasks?

Strategy defines overall goals or what you want to accomplish; Tactics define how you achieve those goals; Tasks stipulate who will perform a specific step and when.

What does the strategic acronym RECEO-VS stand for?

Rescue, Exposures, Confinement, Extinguishment, Overhaul, Ventilation, and Salvage.

Which four RECEO-VS strategic considerations confront initial responders upon arrival?

Rescue, Exposures, Confinement, and Ventilation.

What visual evidence in an attic or cockloft indicates that fire extension has NOT occurred in that space?

The presence of undisturbed cobwebs.

What proper overhaul procedure should be taken with overstuffed furniture involved in a fire?

It should be removed to the exterior of the structure and thoroughly wet down to eliminate deep-seated smoldering fires that cause rekindles.

What guideline must units follow when multiple alarms or 8 to 10 additional companies are called simultaneously?

Standard operating guidelines must dictate that incoming units proceed to Staging unless given specific orders en route, preventing congestion and freelancing.

Using the Strategy Prompter structure for a two-story fire, how does the IC maintain an effective span of control?

The IC only needs to communicate with a maximum of three supervisors: the Division 1 Supervisor, Division 2 Supervisor, and Ventilation Group Supervisor.

What was the historical origin and original name of Crew Resource Management (CRM)?

CRM originated in the airline industry as Cockpit Resource Management after investigations showed human error and unassertive flight crews failing to correct captains caused major fatal crashes.

What reduction in airline disasters occurred following the widespread implementation of CRM?

Disasters dropped drastically from approximately $20\text{ a year}$ to around $1\text{ to }2\text{ a year}$.

What are the five core factors that comprise Crew Resource Management (CRM)?

Communications, Situational Awareness, Decision Making, Teamwork, and Barriers.

What factors did the NTSB credit for the successful outcome of the 2009 'Miracle on the Hudson' ditching?

Excess safety equipment carried aboard the aircraft beyond mandated minimums and excellent CRM demonstrated among the flight crew.

Why do modern structure fires burn hotter and transition to ventilation-limited states faster than older legacy fires?

Because of the prolific modern use of synthetic materials and plastics compared to traditional Class A wood and cotton fuels.

In UL/NIST live burn tests, how did flowing $25\text{ gallons}$ of water into an exterior second-floor bedroom window affect temperatures?

Fire room temperatures decreased from $1792^\text{ }\text{F}$ to $632^\text{ }\text{F}$ in $10\text{ seconds}$, while hallway temperatures dropped from $273^\text{ }\text{F}$ to $104^\text{ }\text{F}$ in $10\text{ seconds}$.

At what specific burn times were the experimental one-story and two-story test homes ventilated during UL/NIST testing?

The one-story home was ventilated at $8\text{ minutes}$ after ignition, and the two-story home was ventilated at $10\text{ minutes}$ after ignition.

What does the 'I' represent in VEIS, and why is this action critical?

Isolate; immediately closing the interior door isolates the searched compartment from the rest of the structure, shutting down the flow path and keeping air from feeding the fire.

What is the technical definition of a flow path in a structure fire?

The movement of heat and smoke from the higher-pressure fire area toward lower-pressure openings (doors, windows, roofs), which pulls incoming fresh air toward the fire.

What did the Governors Island research project reveal regarding exterior water application (offensive-exterior attack)?

Water applied via an exterior stream cools the fire compartment rapidly, does NOT push fire, and drastically improves tenability throughout the building.

Why must an offensive-exterior fire attack be finished on the interior?

Exterior streams knock down visible bulk fire and cool the compartment ('softening the target'), but interior hose crews must enter to accomplish complete extinguishment.

What hazard is created by ventilating a ventilation-limited structure fire before a charged hose-line is in place to apply water?

Introducing fresh oxygen into an underextinguished, ventilation-limited fire creates a rapid, severe ventilation-induced flashover.

What four conditions explain why firefighters historically believed exterior water streams 'pushed' fire?

A flow path change caused by ventilation, steam disrupting the thermal layer and moving ahead of the hose line, gear becoming heat-saturated, or one room being extinguished allowing air into an adjacent room causing it to ignite.

What did Governors Island basement fire testing reveal about floor collapse and hose streams at the top of basement stairs?

Fire and heat traveled upwards through kitchen pipe chases to collapse the kitchen floor rather than through open stair doors, and operating a hose-line down from the top of the stairs had limited suppression impact.