ENGINE COMPANY OPS Flashcards
What are the components of the fire tetrahedron?
Oxygen, Heat, Fuel, Chain Reaction
Which choice best describes 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.
Which choice best describes Backdraft?
Additional oxygen is introduced into a smoldering fire as heated gases enter their flammable range and ignite with explosive force.
Which choice best describes 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.
Which choice best describes 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
