CDL Prep 2026: Practice Test

Pass your CDL the first time. CDL Prep 2026 is a free CDL practice test app with 700+ real questions, clear explanations, and mock exams that mirror the actual CDL knowledge tests — general knowledge, air brakes, combination vehicles, hazmat and every endorsement.

Studying for your CDL permit test in Illinois, Texas, California, Pennsylvania, Wisconsin or North Carolina? CDL knowledge tests follow one national FMCSA model, so this CDL practice test works in every state.

🚛 EVERY CDL TEST, ONE APP
• General Knowledge — required for Class A, B and C
• Air Brakes — removes the L restriction
• Combination Vehicles — required for Class A
• Hazardous Materials (Hazmat, H)
• Tank Vehicles (N)
• Doubles & Triples (T)
• Passenger Transport (P)
• School Bus (S)
• Pre-Trip Inspection
700+ questions, ready the day you install. Nothing is a "coming soon".

📝 MOCK EXAMS THAT MATCH THE REAL TEST
Every mock exam uses the real question count and the real 80% pass line: 50 questions for the general knowledge test, 25 for air brakes, 30 for hazmat, 20 for each endorsement. Timed, graded instantly, with a full answer review. Questions you have not seen yet come first, so back-to-back CDL practice tests never feel repetitive.

🧠 SMART REVIEW THAT REMEMBERS YOUR MISSES
A five-box spaced-repetition system brings each question back right when you are about to forget it, and anything you miss goes to the front of the queue with its explanation. Keep a daily streak, star the tricky ones, and drill your missed list.

🔧 MASTER THE PRE-TRIP INSPECTION
The pre-trip is where most first-time CDL applicants lose the day, so it gets its own deck built around the inspection sequence: what you check on each component, what comes next, and the wording an examiner listens for.

🎯 KNOW EXACTLY WHEN YOU ARE READY
Set your CDL test date and the home screen shows a countdown beside your best mock exam score. Readiness blends how much of each deck you have mastered with your best full-format mock — honest numbers only, never a fabricated score.

👷 WHO IT IS FOR
First-time Class A, B and C applicants; CDL school and ELDT students; drivers adding a hazmat, tanker, doubles/triples, passenger or school bus endorsement; owner-operators before a renewal; and anyone retaking a CDL knowledge test. Drivers in Ohio, Georgia, Florida and Indiana use the same national question pool.

📵 OFFLINE, PRIVATE, NO ACCOUNT
Free download, no sign-up, no email. The whole CDL prep app works with no signal — study in the yard, in the sleeper, or in the DMV parking lot. Your progress stays on your phone.

🌎 ENGLISH INTERFACE
The app interface and all questions are in English.

ℹ️ NOT AFFILIATED WITH ANY GOVERNMENT AGENCY
CDL Prep is an independent study aid from Syanac — not affiliated with the FMCSA, any state DMV/DPS, or any government agency, and does not provide or facilitate government services. Practice scores are an estimate, not a guarantee.

📚 OFFICIAL SOURCES — THE COMPLETE LIST
Our questions are written from these official government publications, and no others:
• FMCSA regulations, 49 CFR Parts 380-397: https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III
• California DMV Commercial Driver Handbook: https://www.dmv.ca.gov/portal/driver-handbooks/
• Texas DPS Commercial Motor Vehicle Drivers Handbook: https://www.dps.texas.gov/section/driver-license
• U.S. FHWA Manual on Uniform Traffic Control Devices (MUTCD): https://mutcd.fhwa.dot.gov/
The same list appears in-app under About → Sources.

Download the free CDL practice test and walk into your CDL permit test ready.