CDL Help: CDL Prep Test 2026

CDL Prep & Practice Test 2026 — CDL Help

Prepare with confidence for your CDL permit test.

CDL Help is a CDL practice test app for the Class A and Class B commercial driver's license. Study 2,500+ practice questions with detailed explanations — offline, in 10 languages.

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PRACTICE TESTS
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Core CDL tests:
• General Knowledge — vehicle rules, safe driving, cargo, vehicle inspection. Required for all CDL applicants.
• Combination Vehicles — coupling and uncoupling, rollover prevention, inspection. Required for Class A.
• Air Brakes — system parts, dual air brakes, checks and correct use.

Endorsement tests:
• HazMat (H) — hazardous materials, placards, emergency response.
• Tanker (N) — loading and unloading, liquid surge, tanker driving.
• Doubles & Triples (T) — coupling more than one trailer, safe driving, inspection.

Also in the app: pre-trip inspection questions, and US road signs with a quiz.

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STUDY TOOLS
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• Complete version (the exam essentials) or Expanded version (extra questions from the CDL handbook)
• Flashcards for quick review
• Reading mode: the question, the correct answer and the explanation together
• Text-to-speech: hear questions read aloud in English
• Bookmark questions to review later
• Practice the questions you missed most
• Shuffle questions
• Timed mock exam
• Set your exam date and get a daily study plan with a countdown
• Progress by topic: questions answered and accuracy
• Your state's CDL handbook in the app — many explanations link to the page they come from
• Detailed explanations based on federal FMCSA regulations

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LEARN CDL AND ENGLISH TOGETHER
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Federal rules require commercial drivers to read and speak English (49 CFR 391.11).

Study in your language and switch any question to English with one tap. You learn the CDL rules and the English words for them at the same time.

When you can read road signs, talk with inspectors and fill in reports in English, you protect yourself, your CDL and everyone on the road.

Languages in the app: English, Spanish, Russian, Chinese, Arabic, Portuguese, Korean, Turkish, Ukrainian, Uzbek.

Some tests and features require an in-app purchase.

Download CDL Help and start studying today.

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SOURCES & DISCLAIMER
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Government-related information in CDL Help comes from these sources:

• FMCSA (Federal Motor Carrier Safety Administration) — federal CDL standards and regulations: https://www.fmcsa.dot.gov
• Federal regulations, Title 49 CFR (including the English proficiency rule, 391.11): https://www.ecfr.gov
• Your state's CDL manual, published by your state driver licensing agency — directory: https://www.usa.gov/state-motor-vehicle-services

DISCLAIMER: CDL Help is a private study app and does not represent any government entity. We are not affiliated with, endorsed by, or connected to the FMCSA, U.S. DOT, or any state DMV or driver licensing agency. We do not issue permits or licenses. Always confirm current requirements with your state's driver licensing agency.

Terms of Use: https://www.cdlhelp.com/terms-conditions
Privacy Policy: https://www.cdlhelp.com/privacy-policy

Recent changes:
New on the home screen: the pre-trip inspection simulator. Practice the walk-around on a full truck and trailer, part by part, with the checklist read aloud in your language. Plus bug fixes and stability improvements.