238. Which of these statements is true about vehicle fires?
Detailed Explanation
A burning tire needs sustained cooling, and water is effective when enough is available. By contrast, suddenly opening an engine hood or cargo door can feed a fire with oxygen and cause it to flare. Keep a safe distance, contact emergency services, and use the correct extinguisher or water only when conditions allow.
Correct Answer: A burning tire should be cooled with water.
Why This Matters on the CDL Test
Use this as part of your General Knowledge review. The real CDL knowledge test rewards drivers who understand the reason behind each rule, not only the answer letter, so read the explanation and then try a few related questions.
How to Remember It
Say the rule in your own words, then explain why the wrong answers are unsafe or incomplete. That habit makes similar General Knowledge questions easier when the exam changes the wording.
Answer Review
The correct choice is "A burning tire should be cooled with water." Tire fires retain intense heat and can reignite, so cooling the tire is essential. The other choices describe opening a hood or trailer doors, which can increase airflow and make a fire more dangerous.
Why the other answers are weaker
- If the cargo or box trailer catches on fire, open the doors as soon as you can."If the cargo or box trailer catches on fire, open the doors as soon as you can." does not best answer this general knowledge knowledge question. When you see a similar option on the CDL permit test, compare it against the exact safety rule and choose the answer that prevents the most immediate risk.
- If your engine is on fire, open the hood as soon as you can."If your engine is on fire, open the hood as soon as you can." does not best answer this general knowledge knowledge question. When you see a similar option on the CDL permit test, compare it against the exact safety rule and choose the answer that prevents the most immediate risk.
Test-Day Checklist
- Read the question once for the topic, then read it again for the exact CDL action being tested in General Knowledge.
- Eliminate answers that sound convenient but skip an inspection, warning sign, or safety step.
- Say the correct rule out loud before moving on so you can recognize it when the exam changes the wording.
Ready to practice for real?
Take our free, full-length General Knowledge practice test. Simulates the actual DMV exam with timed questions.
Start Practice TestRelated Questions
237. Which of these statements is true about causes of vehicle fires?
348. Which of these statements about vehicle fires is true?
107. Which of these statements about downshifting for a long downhill grade is true?
116. Which of these statements about speed management is true?
12. Which of these statements about speed management is true?
Keep Studying General Knowledge
Question pages help you review one rule at a time. To build test-day speed, move back into the full General Knowledge practice test and answer a mixed set without looking at the explanation first.
State CDL Practice Paths
After you understand this answer, use a state practice path to connect the federal CDL rule with the DMV test pages drivers search for most.