CDL Help: CDL Prep Test 2026
Permit Practice: HazMat
| Revenue % | |||||
|---|---|---|---|---|---|
| Monthly | 175 | $20.36 – $41.43 | 24.8% | +18.0% | |
| Weekly | 175 | $7.94 – $15.08 | 24.8% | +18.0% | |
| 3 months | 175 | $50.90 – $91.80 | 24.8% | +18.0% | |
| 6 months | 175 | $79.42 – $151.11 | 24.8% | +18.0% | |
| Annual | 175 | $122.15 – $214.25 | 24.8% | +18.0% |
Description
CDL Practice Test — 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.
PRACTICE TESTS
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.
STUDY TOOLS
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
LEARN CDL AND ENGLISH TOGETHER
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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