CDL (Commercial Driver)
CDL Combination Vehicles Practice Test 13
Free — no payment neededLevel: Mixed
20 original CDL Combination Vehicles questions based on the federal motor carrier safety rules (49 CFR). Practice test, not affiliated with any government agency.
Created by AI
Practice test, not affiliated with any government agency. Original questions written from public sources, checked by a second AI reviewer and automated checks. Rules change; confirm with the official handbook. Available in 2 languages (translations are machine-made and checked automatically).
Before you start
- Questions
- 20 multiple-choice questions, one at a time
- Time
- About 12 minutes. Untimed — take as long as you need.
- Pass mark
- 16 out of 20 correct (80%)
- Feedback
- Your score, the correct answers and short explanations when you finish
- Account
- Not needed. Your answers stay in this browser.
What this test covers
Inspecting combinationsDriving combinations
Preview the first question
During a CDL pre-trip inspection, what must an applicant be able to do for every safety-related part on the test vehicle?
- Identify the part and explain what to check for safe operating condition
- Name the company that manufactured the part and the year it was built
- Replace the part on the spot if it shows any wear at all during the check
- Record the part's age in a maintenance log
Answers are revealed on the results page after you finish.