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28 Cards in this Set
- Front
- Back
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Firefighter Ops Bulletin 1
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Vehicle Fires
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What is the catalytic converter designed to reduce?
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Hydrocarbon and Carbon Monoxide emissions.
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What is the normal operating internal temperature of a catalytic converter?
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1300 – 1600 degrees Fahrenheit
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What is the normal outside temperature of a catalytic converter?
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1000 degrees Fahrenheit
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What can happen if the engine is in poor operating condition, is operating under serve load, or has several misfiring cylinders?
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The catalytic converter can increase in temperature.
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If the catalytic converters are fed too rich a fuel mixture what can happen?
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The catalytic converter can turn into a furnace with temperatures easily exceeding 1600 degrees. This can
cause the converter to maintain-high temperature long after the engine is turn off and have been know to cause fires under the vehicle by igniting grass, debris and other combustible. |
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What does the fuel evaporation control system consist of?
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Closed fuel tank, a holding canister, and a series of lines and line connection that prevent fuel vapors from escaping into the atmosphere.
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The fuel tank cap is designed to prevent passage of gasoline vapors into the atmosphere into the atmosphere. What is the vacuum relief set to operate at?
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Approximately at 3/8 psi and pressure relief to set to open at 1 psi.
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Due to sealed fuel system design, on rare occasions what can happen?
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Due to rapid heat buildup could cause vapors to be release by a violent tank rupture?
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How far away can you position fire apparatus at the front of an auto fire?
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50 feet
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How far away do you position fire apparatus at the rear of an auto fire?
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100 feet
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What angle should you approach a vehicle fire?
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45 degree
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How many attack line are used to extinguish an extensively involved vehicle fire and were are they deployed?
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Two 11/2” lines, first to the passenger compartment and second to the fuel tank to cool it down using a wider fog pattern.
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Vehicle today are using an increase amounts of plastic, magnesium and other exotic metals in their design and with the advent of large SUV what should you consider?
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Immediately call for a second engine company when distance from water source is an issue or if a large passenger vehicle is fully involved.
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During a vehicle fire if the airbags have not deployed what is done?
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Nothing, do not manually deploy the airbags and avoid cutting into any airbag components or cylinders.
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Many air bag systems are designed with a compressed gas inflation system, what PSI are these cylinders pressurized at?
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Between 1400psi and 3000psi.
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Where are the air-bag canister (cylinders) located?
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In the fire wall, B and C post of the vehicle.
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What temperature does some air-bags design to auto inflate?
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Repeated and prolonged temperature above 250 degrees.
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What are the two types of Electric Vehicles?
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An Electric vehicle (EV) propelled by an electric motor and a Hybrid Electric vehicle (BEV) which is an EV with an auxiliary internal combustion motor.
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What fluids in an EV fire that a firefighter might encounter?
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Potassium Hydroxide (KOH), Marlotherm, and Sulfuric Acid
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What is the international coloring of the wiring harness of an Electrical Vehicle?
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Orange
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How long does it take for the capacitors in an Electrical Vehicle to “dump” once the power is cut off?
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5 – 10 minutes
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What is done immediately upon arrival of an accident of fire involving an EV?
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The power system to an EV must be cut off.
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National, how many fires involves automobiles?
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One out every four resulting in 500 deaths and over 3,000 injuries.
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In the District since December 2006 what vehicle fires have increased by 100%?
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Incendiary fires.
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What percentage of vehicle fires in the District of Columbia, were used in serious crime including homicides, armed robberies, and domestic violence?
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0.84
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What are the components of the Burned Vehicle Initiative that will help reduce vehicle fire?
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Prevention- Decreasing the number of intentionally set vehicle fires relating to crime concealment, insurance fraud, and domestic violence cases in the District of Columbia by a measurable percentage.
Intervention- Increasing the number of comprehensive follow-up vehicle fire investigations resulting in higher case closure rates. Training- Improving DC Fire/Arson Investigations Unit's vehicle fire investigative abilities thru involvement with other agencies, jurisdictions, and stakeholders for the purpose of information and resource sharing in the fight against vehicle fires. |
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What are the 4 most common reason vehicle fires are intentionally set?
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To conceal a crime
To be used in a crime Insurance fraud To get rid of an automobile that has been plagued with mechanical problems. |
