Pass Your CDL Written Exam on the First Try
670 updated practice questions across General Knowledge, Air Brakes, HazMat, Tanker, and every other endorsement — plus a 210-page CDL study guide eBook. Try 10 questions free, right here.
Take 10 free CDL practice questions now
Questions are pulled from the General Knowledge section that every CDL applicant must pass. You'll see your score, the correct answers, and detailed explanations at the end.
- 10 multiple-choice questions
- Takes about 5 minutes
- Real-style CDL exam questions
- Score and explanations shown immediately
No sign-up required to take the free quiz.
The complete CDL written exam prep system
Three study tools that work together. Buy once, use everywhere — web, iOS, Android, and PDF.
670 Practice Questions
All sections covered — General Knowledge (270), Air Brakes, Combination Vehicles, HazMat, Tanker, Doubles/Triples, Passenger Transport, and School Bus.
210-Page Study Guide eBook
Comprehensive PDF covering every CDL topic in plain English. Real diagrams, memory aids, and test-day strategies.
Free Mobile App
The companion CDL Prep Practice Test app on iOS and Android. Free to download, study anywhere — even offline.
Study how you learn best
Study Mode
See the correct answer and a detailed explanation after every question. Best for learning new material.
- Answer + explanation after each question
- Filter by section
- Bookmark difficult questions
Exam Mode
Simulate real test conditions with 10-question and 30-question timed exams. Answers shown only at the end.
- 10Q quick exams
- 30Q full exams
- Pass/fail scoring (80% threshold)
Practice Quiz
Quick refreshers across any section. Track which questions you've mastered and which need more work.
- Section-specific quizzes
- Progress tracking
- Missed-questions review
All 8 CDL test sections covered
Whether you're getting your Class A or adding endorsements, we have the questions.
The 210-page CDL Study Guide eBook
Written for new CDL applicants in plain English, this comprehensive eBook covers every CDL topic — from the basics of the DOT physical to advanced HazMat regulations. 27 chapters, dozens of diagrams, memory aids, and a 50-question bonus practice test at the back.
- Full coverage of General Knowledge + every endorsement
- Plain-English explanations and memory aids
- Pre-trip inspection memory script
- 30+ trucking term glossary
- Test-day strategies that actually work
Study on the go with our free CDL app
The CDL Prep Practice Test 2026 app is free to download on iOS and Android — no account required. Perfect for studying during breaks, in the cab, or anywhere you have your phone.
- 100% free to download
- Works offline once installed
- Practice on your phone, take exams on web
- Highly rated on the App Store and Google Play
Ready to pass your CDL written exam?
Take the free quiz above to see where you stand, then unlock 660 more questions and the full study guide eBook for $49.95.