Podcast
Questions and Answers
What should be done if vapors from the relief valve ignite?
What should be done if vapors from the relief valve ignite?
- Shut off the gas supply to the relief valve
- Immediately evacuate the area and call for emergency services
- Allow the LPG to burn and protect exposures (correct)
- Attempt to extinguish the flames immediately
What is a significant factor to consider when predicting BLEVE outcomes?
What is a significant factor to consider when predicting BLEVE outcomes?
- The temperature of the LPG storage cylinder is the only factor for predicting BLEVE
- BLEVE predictions can be accurately made within 5 minutes of fire exposure
- BLEVE predictions are not reliable due to the variability of conditions (correct)
- BLEVE occurrences are limited to residential areas
Which statement is true regarding LPG in confined areas?
Which statement is true regarding LPG in confined areas?
- Confined LPG vapors will not pose any significant danger
- Vapor clouds are easily visible and can be used to define safe perimeters
- LPG is lighter than air and will dissipate quickly outdoors
- LPG vapors can flashover if ignited, affecting the entire confined area (correct)
What is a precaution to be taken in vehicles constructed with plastic components during a fire?
What is a precaution to be taken in vehicles constructed with plastic components during a fire?
What tactic can be used to disperse vapor clouds from LPG?
What tactic can be used to disperse vapor clouds from LPG?
What is a flashover characterized by?
What is a flashover characterized by?
Which of the following actions can help reduce the potential for backdraft?
Which of the following actions can help reduce the potential for backdraft?
What does BLEVE stand for?
What does BLEVE stand for?
What is a recommended safety precaution when dealing with a vehicle fire with a fuel tank?
What is a recommended safety precaution when dealing with a vehicle fire with a fuel tank?
Where is the LPG storage cylinder typically found on a vehicle?
Where is the LPG storage cylinder typically found on a vehicle?
How can the flow of LPG through the piping be regulated?
How can the flow of LPG through the piping be regulated?
What type of gas emissions are likely from burning plastics in a vehicle fire?
What type of gas emissions are likely from burning plastics in a vehicle fire?
What must be done before making entry into a vehicle where fire is suspected?
What must be done before making entry into a vehicle where fire is suspected?
What is a key factor in preventing backdraft situations during automobile fires?
What is a key factor in preventing backdraft situations during automobile fires?
Which of the following is a consideration when dealing with BLEVE during automobile fires?
Which of the following is a consideration when dealing with BLEVE during automobile fires?
What can be a toxic gas emitted from burning plastics in vehicle fires?
What can be a toxic gas emitted from burning plastics in vehicle fires?
In which situation would LPG vehicle safety be a major concern?
In which situation would LPG vehicle safety be a major concern?
What is a primary characteristic of flashover scenarios in automobile fires?
What is a primary characteristic of flashover scenarios in automobile fires?
What should be monitored to prevent backdraft risks in a burning vehicle?
What should be monitored to prevent backdraft risks in a burning vehicle?
What is a significant hazard associated with BLEVE in vehicles?
What is a significant hazard associated with BLEVE in vehicles?
What should be considered regarding the placement of apparatus at a vehicle fire to reduce hazards during a flashover?
What should be considered regarding the placement of apparatus at a vehicle fire to reduce hazards during a flashover?
Flashcards
LPG Relief Valves
LPG Relief Valves
Allow relief valves to function correctly on LPG cylinders. Burning vapors should be allowed to burn while protecting exposures.
Cooling LPG Cylinders
Cooling LPG Cylinders
Cool LPG storage cylinders with water to prevent BLEVE if fire threatens.
BLEVE
BLEVE
Boiling Liquid Expanding Vapor Explosion; recorded incidents can happen within 10 minutes of fire exposure.
LPG Vapor Behavior
LPG Vapor Behavior
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Flashover
Flashover
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Backdraft
Backdraft
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Hose Line Importance
Hose Line Importance
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Cross-Ventilation
Cross-Ventilation
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Preventing BLEVE
Preventing BLEVE
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Prevent Water Overflow
Prevent Water Overflow
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Identifying LPG Vehicles
Identifying LPG Vehicles
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LPG Flow Control
LPG Flow Control
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Pressure Relief Valve
Pressure Relief Valve
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Apparatus Placement
Apparatus Placement
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Vehicle Fire Zones
Vehicle Fire Zones
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IDLH
IDLH
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Suppression Tools
Suppression Tools
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Combustible Metals
Combustible Metals
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Vehicle Construction
Vehicle Construction
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Toxic Gases
Toxic Gases
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Vehicle Stabilization
Vehicle Stabilization
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Study Notes
LPG Fire Safety and Procedures
- Allow relief valves to function properly; if LPG vapors ignite, let them burn while protecting exposures.
- If fire threatens LPG storage cylinders, control the fire and cool the cylinders.
- BLEVE (Boiling Liquid Expanding Vapor Explosion) unpredictability: recorded incidents can happen within 10 minutes of fire exposure.
- LPG is heavier than air and accumulates in low-lying areas; vapor clouds may indicate flammability but are not reliable for defining safe zones.
- Vapors can ignite and cause flashovers, posing significant risks in confined spaces.
Materials of Construction in Vehicle Fires
- The automobile industry employs plastics extensively for weight reduction and fuel economy, including in engine parts and body panels.
- Vehicle fires release toxic gases from burning plastic components.
- Flashover is a risk, signifying sudden ignition of gases that raises temperatures dramatically; backdrafts can also occur in vehicle contexts.
- A charged 1-1/2” hose line is crucial for safety when entering suspected fire areas; prepare it in advance.
- Cross-ventilation and breaking windows can reduce backdraft potential.
BLEVE Considerations in Vehicle Incidents
- BLEVE risks arise from liquid fuel in tanks exposed to fire heat; cooling the fuel tank is critical if fire threatens.
- Prevent water from entering the tank to avoid overflow hazards.
- Recognizing LPG vehicles:
- LPG storage cylinders are typically outside the vehicle or securely contained.
- Flow management of LPG can be controlled by closing storage cylinder valves, identified by signs.
- Ensure the presence of a pressure relief valve on LPG storage cylinders.
Strategy and Tactics for Vehicle Fires
- Key strategies include apparatus placement uphill and upwind to minimize risks.
- Focus on personnel protection, appropriate warning devices, and ensuring a reliable water supply.
- Consider the specific areas involved in vehicle fires: engine compartment, passenger area, trunk/cargo area, and vehicle exterior.
- Safety protocols include recognition of IDLH conditions, vehicle stability, and the use of a 1-1/2” hose line or dry chemical extinguishers.
- Awareness of hazards posed by combustible metals and plastics in vehicle incidents is essential for effective firefighting.
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