Firefighter ProBoard Practice Test 2026 - Free ProBoard Practice Questions and Study Guide

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Which action could cause injury to firefighters when fighting a vehicle fire?

Cars Can Jump into Gear and Roll Forward.

Tempered Glass Will Break into Sharp Shards.

Trunks Can Pop Due to Increased Pressure.

Energy-Absorbing Bumpers Can Explode.

When a vehicle is on fire, components designed to manage crash energy can become explosive hazards. Energy-absorbing bumpers are built to absorb impact by storing energy and sometimes even housing devices that release that energy during a crash. Heat from the fire can cause these parts to fail violently, ejecting fragments or causing a burst that can injure firefighters nearby. That explosive possibility is why this option is the primary danger in a vehicle-fire scenario: it involves a part of the vehicle specifically engineered to store and release energy under stress, which can unleash a dangerous blast or flying debris if heated.

Other hazards listed exist in fires—tempered glass can shatter and cause cuts, a trunk might pop open due to pressure, and a vehicle in gear could roll—yet none present the same immediate, high-risk explosive threat to firefighters as an energy-absorbing bumper failing under heat.