General Knowledge · Fires
What are common causes of a commercial vehicle fire?
1.An overheated wheel or tire from underinflation or a dragging brake, a short circuit or damaged wiring, and a fuel leakCorrect answer
2.Smoking in the cab, which is the only realistic cause of a commercial vehicle fire out on the road
3.Only cargo fires that involve flammable liquids of one kind or another, and never anything else at all
4.Lightning strikes, by far the most common cause of commercial vehicle fires out on the open highway
Explanation
Common causes of a commercial vehicle fire include an overheated wheel or tire from underinflation or a dragging brake, a short circuit or damaged electrical wiring, and a fuel leak, the practical risks a driver needs to recognize since 49 CFR 383.111(a)(3)(i) specifically names fire extinguishers among the required-knowledge safety systems without stating why one might be needed. The wrong options each narrow the real picture to a single, less common cause: smoking, cargo fires, or lightning are all possible but are not the ordinary, everyday causes a driver is actually trained to watch for.
Source: 49 CFR 383.111(a)(3)(i)
Related Fires questions
- What fire extinguisher rating does federal regulation require for a power unit designed or used to transport hazardous materials that must be placarded?
- During a trip, what should a driver do to help prevent a wheel or tire fire?
- What is the correct technique for using a fire extinguisher on a small vehicle fire?
- If a driver suspects a smoldering fire inside a closed cargo compartment, what should the driver do?