FF OPS BULL Vehicle Fires Flashcards
(51 cards)
Most accidental vehicle fires are caused by…
either electrical or fuel system malfucntions.
How may an electrical system malfunction be solved in an emergency?
by either turning off the ignition source or d/c all applicable batteries.
What are the major components of the fuel system of a vehicle?
fuel injector and lines, catalytic converter, and fuel evaporation system (which includes the fuel tank).
What is the catalytic converter designed to do?
reduce hydrocarbon and carbon monoxide emissions before they reach the atmosphere?
What vehicle component is designed to reduce hydrocarbon emissions?
the catalytic converter
What vehicle component is designed to reduce CO emissions?
the catalytic converter
What is the normal internal temperature range for a catalytic converter?
1300 to 1600F
What is the normal external temperature range for a catalytic converter?
about 1000F
When may higher than normal catalytic converter temperatures be reached?
when the engine is in poor operating condition (especially if fuel/air mixture is too rich), under severe load, or has several misfiring cylinders.
A rich fuel/air mixture can cause a catalytic converter to exceed _______ F.
1600
What is the fuel evaporation control system designed to do?
prevent the loss of fuel vapors from the carburetor and fuel tank due to evaporation, and prevent fuel expansion overflow.
What does the evaporation control system consist of?
a closed fuel tank, a holding canister, and a series of lines and line connectors
What is the fuel tank cap vacuum relief set to?
approximately 3/8th of a psi.
What is the fuel tank cap pressure relief set to?
1psi
What should be considered appropriate from both a tactical and a safety standpoint?
the act of cooling the tank with a second hose
Why will F/Fs initially respond wearing full PPE including SCBA?
due the evolving technology and materials involved in vehicle fires.
How far from a vehicle must apparatus be positioned?
50’+ to the front (100’ is preferred) or 100’+ to the rear. Adjust accordingly if the vehicle is known to have a fuel tank in front.
What is the purpose of approaching a vehicle fire from a 45 degree angle?
to reduce the chance of apparatus or personnel being caught by an unintentional fuel tank rupture.
What will be used to provide maximum protection to personnel and effectively extinguish an extensively involved vehicle?
Two (2) 1 1/2 inch lines.
What will the two lines used at an extensively involved vehicle fire do?
1st line: pax compartment; 2nd line, in a wider fog pattern, under car to fuel tank
When should consideration be given to immediately calling for a second engine company?
When distance from a water source is an issue, or if, u/a there is a large pax vehicle that is well involved.
What may removing the fuel cap do?
Allow superheated gasoline vapors to excape to an oxygen rich environment and ignite.
Some airbags are inflated with compressed gases pressurized between
1400 and 3000 psi
Where can airbag inflation cylinders be found?
in the firewall, B-post, and C-post.
