CDL (Commercial Driver)
CDL General Knowledge Practice Test 13
Free — no payment neededLevel: Mixed
20 original CDL General Knowledge 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
Hours of serviceVehicle inspectionAlcohol drugs and fitnessRailroad crossingsDriver qualification and disqualificationSeeing and communicating
Preview the first question
In an emergency, when may a driver complete the run without violating the hours rules?
- If the run could reasonably have been finished without the emergency
- If the carrier asks for extra loads
- If the driver is within 150 air miles of home and the carrier agrees
- If the driver has already driven 11 hours and has a sleeper berth
Answers are revealed on the results page after you finish.