CDL (Commercial Driver)
CDL General Knowledge Practice Test 35
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
Accident proceduresVehicle inspectionHours of serviceSeeing and communicatingRailroad crossingsDriver qualification and disqualification
Preview the first question
A truck is stopped on the shoulder of a divided highway. How far back should the two devices toward approaching traffic be placed?
- 50 feet and 150 feet
- 10 feet and 40 feet
- 100 feet and 200 feet
- 300 feet and 500 feet
Answers are revealed on the results page after you finish.