CDL Practice Tests by State and Subject

Every CDL knowledge test in the United States is built on the same federal model: General Knowledge for everyone, plus endorsement tests such as Air Brakes and Combination Vehicles. Pick a state for local exam facts, or jump straight into a subject below.

States now live

• California
• Florida
• New York
• Pennsylvania
• Texas

Additional states are in production. The core question bank is federally aligned, so any live state’s practice tests are valid study material wherever you test.

Subjects

• General Knowledge

  Required for every CDL class: vehicle inspection, safe driving, cargo, and hazard awareness. 400 questions live now.

• Air Brakes

  Required if your vehicle has air brakes: system parts, dual systems, inspection, and safe use. 250 questions live now.

• Combination Vehicles

  Required for combination vehicles: coupling and uncoupling, rollover prevention, and combination inspection. 250 questions live now.

What the real test looks like

The General Knowledge test is typically 50 multiple-choice questions, and most states require about 80% correct to pass. Endorsement tests are shorter. Questions cover vehicle inspection, safe driving, cargo, and hazard awareness — exactly the topics drilled here, each with a written explanation.

Ready for exam conditions? Try the timed Exam Simulator.