Chapter 17 – fire attack Flashcards
Four factors that separate modern dwellings from legacy dwellings are:
- Larger homes
- Open house geometries
- Increased fuel loads
- New construction material
Modern dwellings are almost ……..as large as legacy single-family dwellings
Twice
Open geometry in modern homes reduces ………. and allows more air to support rapid fire propagation
Compartmentalization
Movement of heat and smoke from a higher pressure area within a fire area toward lower pressure areas accessible via doors, windows, and other openings
Flow path
………….by applying 30 - 90 seconds of water into the compartment dramatically reduces Fire development and improved conditions
Softening the target
The fire officer needs to see and directly communicate with all of the members when performing a task in a high-risk situation, such as ………
IDLH environment or below grade rescue
Size up begins long before arrival and continues until the incident is …………
Stabilized
The end result of a good size up is an ………… that considers all the pertinent information, defines strategies and tactics, and assigns resources to complete those tactics.
Incident Action Plan
SOP’s list the essential ……….. factors, which include building size and arrangement, type of construction, occupancy, fire and smoke conditions, and other factors, such as weather and time of day.
Size Up factors
Vigorous dark smoke churning means a high heat release rate, indicating ……… conditions are present
Flashover
Before introducing additional air into a compartment that is belching dark, billowing smoke, the officer needs to Soften the target and coordinate ………. efforts with the assigned crews
Ventilation
Fires involving class B combustibles require the use of ……….
Foams
A fire in Class A combustibles normally dictates a direct attack with………..
Water
Five step process for analyzing emergency situation, created by chief Lloyd Layman, in 1940:
Fundamentals of fire tactics
Layman’s size up procedure
- Facts
- Probabilities
- Situation
- Decision
- Plan of operation
The National Fire Academy NFA has developed a size up system that includes three phases:
- Pre-incident information
- Initial size up
- Ongoing size up
NFA initial Size Up “ what do I have?” Should include these actions?
- The IC completing a 360 around the building
- Locating the fire and the size of the fire as well as volume, color, movement, and location of smoke.
- Also the size and construction of the building
- Any exposures, and special concerns such as the possibility that light weight construction could be involved.
……………consist of an advance into the fire building by firefighters with hose lines or extinguishing agent to overpower the fire.
This activity drives most fire department training, operations, and organizational structures.
Offensive operation
The risks of an offensive attack can be justified only when it may generate realistic benefits.
Specifically, there must be …………. that can be saved to justify taking this risk.
Lives or valuable property
A ……….. is used when the risks outweigh the benefits.
Firefighters are not allowed to enter the structure or do not operate for positions that involve avoidable risks
Conducted from the exterior, using large streams to contain and, if possible, overwhelm a fire.
A defensive operation
A strategy where a defensive operation is initiated, but with the recognition that the situation could change to an offensive approach when interior conditions improve.
Transitional operation
Chief Lloyd Lehman developed a list of seven factors to assist in developing an action plan. What is the acronym?
R Rescue E exposures C confinement E Extinguishment O overhaul V ventilation S Salvage
RECEO VS
The first five factors are listed in a priority order, the last two maybe used at any point to support the first five.
The best method of protecting the occupants from harm is to ………..
Extinguish the fire quickly
Whenever interior search and rescue operations are underway, the fire must be attacked to give the rescuers time to enter the structure and search for occupants
The best method of protecting an exposed property is ………..
Make an aggressive fire attack and extinguish the fire before it can spread
If the fire is in one room, the objective of confinement should be to …………
Confine the fire to that room of origin
and
prevent spreading of fire to uninvolved areas of the same property
………. eliminates or significantly reduces the need for rescue, exposure, and confinement properties.
Rapid extinguishment