Free Tennessee CDL Practice Test (2026)
Practice the Tennessee CDL permit test the way it is really written, with the correct answer and an explanation on every question.
Tennessee CDL Requirements
5-Question TN Challenge
Real general knowledge questions, with the answer and an explanation after each one.
If you check the battery box and notice that the cell caps are missing, what should you do?
Tennessee CDL permit test: what to expect
The written exam most people call the Tennessee CDL permit test is the general knowledge test, and passing it is what gets you a commercial learner's permit rather than the license itself. You need 80% to pass, a federal standard that is the same in every state. The number of questions is set by Tennessee, and our practice tests use the common 50-question format.
Once you hold the permit you have to keep it for at least 14 days before you are allowed to attempt the skills test, so it is worth sitting the written exam as early as you can. Practice below until you are clearing Tennessee's standard comfortably rather than scraping it.
How to get a CDL in Tennessee
To obtain a Commercial Driver's License in the Tennessee, you must first pass the General Knowledge exam. Depending on the type of vehicle you intend to drive, additional endorsements like Air Brakes, Tanker, or Hazmat may be required.
- Get a DOT medical exam, and if this is your first CDL, finish Entry-Level Driver Training with an FMCSA-registered provider.
- Study the Tennessee CDL manual and pass the vision and knowledge tests at a Driver Services Center. The general knowledge test has 50 questions and you need 80% to pass.
- Get your commercial learner permit (CLP) and hold it for at least 14 days before the skills test.
- Practice with a licensed CDL driver, then pass the three-part skills test: pre-trip inspection, basic control, and the road test.
- Return to the Driver Services Center to have your Tennessee commercial driver's license issued.
Official source: Tennessee Department of Safety & Homeland Security.
Practice every part of the Tennessee CDL test
Your Tennessee exam is split into separate knowledge tests. Drill each one until you're confident.
5 Tennessee CDL Practice Questions and Answers
Here are 5 sample Tennessee general knowledge questions with the right answer and a quick explanation for each. Read through them, then take the quiz above to see how you do without looking.
1. If you check the battery box and notice that the cell caps are missing, what should you do?
- A. Add distilled water and leave them open.
- B. Cover the holes with duct tape.
- C. Consider it a defect; battery caps must be present and secure. (correct answer)
- D. Nothing, modern batteries are designed to vent freely.
Why: Battery cell caps must be securely in place. Missing caps allow dangerous battery acid to spill out, which is a significant safety defect.
2. Where do multi-speed rear axles and auxiliary transmissions provide extra gears?
- A. Only in the reverse range.
- B. Only in the high-speed overdrive range.
- C. They provide a series of extra gears for varying driving conditions and loads. (correct answer)
- D. They only provide gears used during engine braking.
Why: Multi-speed rear axles and auxiliary transmissions provide extra forward gears to help control heavy loads across different terrains.
3. Why should a commercial driver be especially wary of bridges during freezing weather?
- A. They are structurally weaker in the cold.
- B. They freeze before the rest of the roadway because cold air surrounds them. (correct answer)
- C. They expand and cause massive bumps at the seams.
- D. They are illegal for commercial vehicles to cross below 32 degrees Fahrenheit.
Why: Bridges and overpasses do not have earth underneath to insulate them. Cold air circulates above and below, causing them to freeze and become icy before the adjoining roads do.
4. Why is it illegal and dangerous to coast down a hill with the transmission in neutral?
- A. It damages the clutch brake
- B. It consumes more fuel than being in gear
- C. You lose the braking effect of the engine and risk losing control (correct answer)
- D. It causes the transmission fluid to overheat
Why: Coasting in neutral removes the engine's braking effect, forcing the service brakes to do all the work. This leads to brake fade and a complete loss of control.
5. You are driving during a heavy rainstorm and see a pool of standing water in your lane. What is the immediate danger?
- A. Washing the grease off your fifth wheel.
- B. Hydroplaning and losing completely steering and braking control. (correct answer)
- C. Engine block cracking due to rapid cooling.
- D. Failing an unexpected DOT inspection.
Why: Standing water poses a serious risk of hydroplaning, where the tires ride up on a film of water, causing a total loss of steering and braking control.
CDL Job Market in Tennessee
Tennessee has FedEx's global air hub plus several big carrier headquarters, Covenant Transport among them, so there's no shortage of work for new and experienced drivers alike. Memphis by itself is a top-five US freight market by volume, and Nashville's fast growth has sent last-mile delivery demand through the roof. There's no state income tax here, so a strong regional paycheck stretches further than the same wage would in neighboring states.
Covenant Transport (HQ), FedEx (Global Hub), Roadmaster Drivers School, Dollar General Corp.
Tennessee CDL average: about $52,000 in 2026. Nashville and Memphis are both top-10 US distribution hubs, and Memphis is home to the FedEx global sorting center that handles millions of packages nightly.
Tennessee CDL Test FAQs
How old do you have to be to get a CDL in Tennessee?
You can drive commercially within Tennessee at 18. To drive across state lines or carry hazardous materials, you have to be 21.
What score do I need to pass the Tennessee CDL knowledge test?
The general knowledge test has 50 questions and you need at least 80% correct. Our free Tennessee CDL practice tests use the same style of questions so you'll know you're ready.
Where do I take the Tennessee CDL test?
The Tennessee Department of Safety & Homeland Security handles CDL knowledge and skills testing at Driver Services Centers around the state. Check its site for locations and current fees.
How long do I have to hold my Tennessee commercial learner permit?
You must hold your CLP for at least 14 days before you can take the skills test. That waiting period is a federal rule Tennessee follows.
Do I need Entry-Level Driver Training for a Tennessee CDL?
Yes. If this is your first CDL, you have to complete ELDT with an FMCSA-registered provider before you test.