During a vehicle fire, which hazard can occur as internal pressure rises within a compartment?

During a vehicle fire, which hazard can occur as internal pressure rises within a compartment?

• A. The Car Doors May Jam During Cooling.
• B. Windows May Crack Due to Heat.
• C. Trunks Can Pop Due to Increased Pressure.
• D. Fuel Lines May Rupture.

Answer: (C)

When a vehicle catches fire, heat makes the air and gases inside its enclosed compartments expand. As pressure builds in those sealed or partially sealed spaces, the strongest or least reinforced points can give way, causing the lid or hatch to pop open. The trunk is a common target because it traps expanding gas and is designed to move on hinges, so increased pressure can cause it to pop. Other effects like doors jamming, windows cracking, or fuel lines rupturing can happen in fires for different reasons, but the direct consequence of rising internal pressure in a compartment is a trunk or hatch popping open.

When a vehicle catches fire, heat makes the air and gases inside its enclosed compartments expand. As pressure builds in those sealed or partially sealed spaces, the strongest or least reinforced points can give way, causing the lid or hatch to pop open. The trunk is a common target because it traps expanding gas and is designed to move on hinges, so increased pressure can cause it to pop. Other effects like doors jamming, windows cracking, or fuel lines rupturing can happen in fires for different reasons, but the direct consequence of rising internal pressure in a compartment is a trunk or hatch popping open.