Engine Co Flashcards
(32 cards)
What are the components of the fire tetrahedron?
Oxygen, Heat, Fuel, Chain Reaction
Flashover
All surfaces and objects within a space have been heated to their ignition temperature and simultaneous ignition of all surfaces and objects in the space occurs
Backdraft
Additional oxygen is introduced into a smoldering fire as heated gases enter their flammable range and ignite with explosive force.
Rollover
Flames present in layers of smoke as a result of heated gases that are pushed under pressure from the fire area into uninvolved areas.
Thermal Layering
Tendency of gases to form into layers according to temperatures
Which stage of fire development is defined as: heat, oxygen, and a fuel source combine and have a chemical reaction resulting in fire.
Incipient
Which stage of fire development is defined as: the fire increases in size from small flames to full fire that involves the entire room.
Growth
Which stage of fire development is defined as: fire continues to burn until the available fuel and oxygen in the room or area is consumed or extinguished.
Fully Developed
Which stage of fire development is defined as: occurs once all available oxygen is consumed.
Decay
Rollover should serve as a warning that…
The fire may be reaching the point of flashover
The increased HRR of modern materials results in:
Flashover happening quicker
What is the initial hoseline positioning for hydraulic ventilation?
2’ away from a window with a fog pattern covering 80% of the opening
Which factors determine the effectiveness of hydraulic ventilation?
Distance from opening and pattern used
White/Grey smoke is indicative of:
Moisture or early stage incipient Class A fire Too lean to contribute to fuel load
Grey smoke is indicative of:
Early stage incipient/free burning fire with Class A and B fuel sources Smoke possibly reaching the LEL level
Grey/Black or Brown smoke is indicative of:
Fully developed fire with Class A and B fuel sources that is most likely ventilation-limited Smoke is in the flammable range and subject to burn if heat is available
Black/Brown smoke is indicative of:
Fully developed or decaying stage fire that is extremely ventilation-limited Smoke is typically too rich to burn
The first “E” in RECEO VS stands for?
Exposure
general plan or course of action decided upon to reach the objectives
Strategy
specific actions employed to fulfill a strategy.
Tactics
the primary focus of any incident
Rescue of life
The primary goal of the exposure line
Minimize fire spread and stay ahead of the fire
Where should overhaul start?
In void spaces and closest to the fire, working towards unburned side
The introduction of ANY additional ventilation into a structure will increase fire intensity and fire spread.
T or F
True
