CDL Practice Test
Updated October 2026Facts verified Oct 18, 2026 against U.S. Department of Transportation – Federal Motor Carrier Safety Administration (49 CFR Part 383); TSA for the hazmat th
- To pass each Commercial Driver's License (CDL) knowledge test, an applicant must correctly answer at least 80 percent of the questions. (ecfr.gov)
- The TSA fee for a new or renewing Hazardous Materials Endorsement (HME) threat assessment is $85.25, effective January 1, 2025. (tsa.gov)
- The TSA fee for a new or renewing Hazardous Materials Endorsement (HME) threat assessment is reduced to $41.00 for applicants who already hold a valid TWIC card. (tsa.gov)
- A state must use a different version of the test when a Commercial Driver's License applicant retakes a previously failed knowledge test. (ecfr.gov)
- A commercial learner's permit (CLP) is valid for no more than one year from its initial issue date unless the holder retakes the general and endorsement knowledge tests. (ecfr.gov)
- CDL knowledge tests may be given in written form, verbally or in automated format, and in a foreign language as long as no interpreter is used. (ecfr.gov)
- A commercial learner's permit holder must be at least 18 years old and cannot take the CDL skills test in the first 14 days after the permit is first issued. (ecfr.gov)
Facts verified Oct 18, 2026 against Federal Motor Carrier Safety Administration (FMCSA), U.S. DOT; tests administered by each state driver licensing agency. Dates that have passed are removed automatically.
CDL Exam at a Glance
| Item | Detail | Official source |
|---|---|---|
| Passing score | 80% on each knowledge test | ecfr.gov |
| Exam fee (Hazmat endorsement (TSA threat assessment)) | $85.25 | tsa.gov |
| Exam fee (Hazmat endorsement, TWIC holder) | $41.00 reduced rate | tsa.gov |
| Retake policy | Retake must use a different test version | ecfr.gov |
| Validity (Commercial learner's permit) | Max 1 year from initial issuance without retesting | ecfr.gov |
| Delivery | Written, verbal or computer; foreign language allowed, no interpreter | ecfr.gov |
| Eligibility (Commercial learner's permit) | Age 18+; 14-day wait before the skills test | ecfr.gov |
Facts verified Oct 18, 2026 against Federal Motor Carrier Safety Administration (FMCSA), U.S. DOT; tests administered by each state driver licensing agency. Dates that have passed are removed automatically.
Note: The exact number of questions and fees for the CDL license may vary slightly by state. Always verify with your local DMV for specific CDL class cost and testing requirements.
CDL Flashcards
Quick review for key Commercial Driver's License concepts
🛑What is the air compressor governor?
The governor controls when the air compressor pumps air into the air storage tanks.
START CDL PRACTICE TEST🚛What is the maximum width of a commercial vehicle?
The maximum width for most commercial vehicles is 102 inches or 8.5 feet.
GET CDL EXAM PREP⚠️What does a Hazmat placard indicate?
Placards warn others of hazardous materials and indicate the class of hazard contained.
REVIEW CDL QUESTIONS🔍How often should you check your mirrors?
You should check your mirrors every 5 to 8 seconds while driving.
TRY CDL MOCK EXAM🌧️What is hydroplaning?
Hydroplaning occurs when tires lose contact with the road and ride on a layer of water.
ACCESS CDL STUDY GUIDE🔄What is off-tracking?
Off-tracking is when the rear wheels follow a different path than the front wheels during a turn.
PRACTICE CDL TEST NOWCDL Exam Study Guide
Our CDL study guide breaks down everything you need to know about the CDL license process. From registration to salary expectations, explore the tabs below for detailed information on how to become a professional driver.
CDL Score Calculator
Total Scored Questions
50
35 out of 50 correct
70%
Required to Pass: ~70% (Estimated)
Many trucking companies offer paid CDL training or tuition reimbursement in exchange for a work commitment. Look for "company-sponsored CDL programs" to lower your CDL course cost. Practice with the free CDL practice test on PracticeTestGeeks (850+ questions with answer explanations).
Free CDL Study Tools
Interactive CDL resources on PracticeTestGeeks, free to start:
- CDL Road Signs and Signals Practice Test 1 — 25 questions with instant scoring and answer explanations
- CDL flashcards — review key terms and concepts card by card
- CDL study guide — topic-by-topic overview of what the exam covers
- CDL cheat sheet — one-page printable summary for last-minute review
CDL Practice Test Questions
Prepare for the CDL - Commercial Driver's License exam with our free practice test modules. Each quiz covers key topics to help you pass on your first try.
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CDL Exam Questions covering Alabama CDL Combination Vehicles Practice Test. Master CDL Test concepts for certification prep.
CDL Alabama General Knowledge CDL Practice...
CDL Mock Exam on Alabama General Knowledge CDL Practice Test. CDL Study Guide questions to pass on your first try.
CDL Airbrakes Practice Test
CDL Test Prep for Airbrakes Practice Test. Practice CDL Quiz questions and boost your score.
CDL CLASS A COMMERCIAL DRIVER'S LICENSE PR...
CDL Mock Test covering CLASS A COMMERCIAL DRIVER'S LICENSE PRACTICE TEST. Online CDL Test practice with instant feedback.
CDL Hazmat Practice Test
CDL Mock Test covering Hazmat Practice Test. Online CDL Test practice with instant feedback.
CDL Pre-Trip Inspection
CDL Practice Questions for Pre-Trip Inspection. Build confidence for your CDL certification exam.
CDL Tanker Practice Test
Free CDL Practice Test featuring Tanker Practice Test. Improve your CDL Exam score with mock test prep.
CDL Class A Commercial Driver's License Pr...
CDL Mock Exam on Class A Commercial Driver's License Practice Test -1. CDL Study Guide questions to pass on your first try.
CDL Test Day Checklist
- ✓Valid Driver's License
- ✓Commercial Learner's Permit (CLP)
- ✓Medical Examiner's Certificate
- ✓Vehicle Registration & Insurance
- ✓Test Appointment Confirmation
- ✓Correct Class Vehicle
- ✓Payment for Fees
- ✓Pre-trip Inspection Knowledge
CDL Renewal Requirements
Renewal Cycle
5-8 Years
Medical Card Every
2 Years
Renewal Fee
$75 - $150
Keep your CDL medical card current. Driving with an expired medical certificate can lead to the downgrade of your CDL license to a non-commercial status.
Related Driving Practice Tests
If you are preparing for a career in driving, you may also find these related practice tests helpful:
Prepare for the DMV - Department of Motor Vehicles — the Department of Motor Vehicles written knowledge test for obtaining a US driving permit or license.
Prepare for the G1 - Ontario G1 Driver's License — the Ontario G1 knowledge test for new drivers in Ontario, covering road signs and traffic rules.
Prepare for the DVSA - UK Driving Theory Test — the UK DVSA driving theory test covering highway code, hazard perception, and road safety.
Prepare for the DKT - Driver Knowledge Test — the Australian Driver Knowledge Test for learner drivers in New South Wales.
Prepare for the UK Car Theory Test — the UK car driving theory test covering road signs, rules, and hazard perception.
If you want more targeted practice, the cdl questions and answers pdf page covers the same material with additional questions and explanations.
If you want more targeted practice, the air brakes practice test page covers the same material with additional questions and explanations.
CDL: Pros and Cons
- +cdl — cDL exam preparation strengthens your knowledge across all domains
- +Passing the exam proves competency to employers and clients
- +Study materials and practice tests are widely available
- +Exam-based credentials are portable across states and employers
- +Clear exam objectives help focus your study plan effectively
- −Exam anxiety can affect performance — practice tests help reduce it
- −Registration fees are non-refundable if you miss your test date
- −Limited retake opportunities may apply with waiting periods
- −Exam content updates periodically — use current study materials
- −Testing center availability may require advance scheduling
Pros and Cons at a Glance
| Pros | Cons |
|---|---|
| cdl — cDL exam preparation strengthens your knowledge across all domains | Exam anxiety can affect performance — practice tests help reduce it |
| Passing the exam proves competency to employers and clients | Registration fees are non-refundable if you miss your test date |
| Study materials and practice tests are widely available | Limited retake opportunities may apply with waiting periods |
| Exam-based credentials are portable across states and employers | Exam content updates periodically — use current study materials |
| Clear exam objectives help focus your study plan effectively | Testing center availability may require advance scheduling |
Sample CDL Practice Questions
Try these questions from our free CDL practice tests. The correct answer and an explanation follow each question.
During the CDL skills test for a Class A vehicle, which of the following is NOT one of the three required test components?
- A. Pre-trip vehicle inspection
- B. Basic vehicle control maneuvers
- C. Emergency brake pressure test
- D. On-road driving test
Answer: C. Emergency brake pressure test
The three mandatory components of the CDL skills test are the pre-trip inspection, basic vehicle controls (backing, turning, coupling/uncoupling), and the on-road driving test. An emergency brake pressure test is not a standalone required component.
For your pre-trip vehicle inspection test, your entry doors should be in what condition?
- A. Entry doors should be in working condition.
- B. Entry doors should operate smoothly from the outside.
- C. Your entry doors should be undamaged.
- D. All of the listed answers.
Answer: D. All of the listed answers.
For your pre-trip vehicle inspection test, the entry doors must be thoroughly checked to ensure they are safe and functional. This means they should be undamaged, operate smoothly from both the inside and outside, and be in overall working condition. Proper door function is essential for driver and passenger safety, as well as for securing cargo.
On the CDL pre-trip vehicle inspection test, you can expect to ________.
- A. To explain why you want a commercial driver's license.
- B. To be asked to explain to the examiner what parts of your vehicle you would inspect and why.
- C. To answer general CDL questions.
- D. To park your school bus.
Answer: B. To be asked to explain to the examiner what parts of your vehicle you would inspect and why.
The CDL pre-trip vehicle inspection test assesses a driver's ability to identify and explain critical vehicle components and their proper functioning. You are expected to demonstrate your knowledge by explaining what parts you would inspect and why they are important for safe operation. This ensures you can detect potential mechanical issues before driving, which is crucial for commercial vehicle safety.
Which of the following is a necessary step to test your service brakes?
- A. Release the parking brake.
- B. Move the vehicle forward slowly.
- C. All of the listed answers.
- D. Wait for normal air pressure.
Answer: C. All of the listed answers.
Testing your service brakes involves several critical steps to ensure they are functioning correctly. You must first wait for normal air pressure to build up, then release the parking brake. Finally, move the vehicle forward slowly and apply the brakes to check for proper stopping action, ensuring the vehicle stops smoothly and in a straight line.
Take the full CDL practice test
CDL Exam Questions and Answers
Disclaimer: This app is not affiliated with or endorsed by any state DMV or the FMCSA and is intended for educational and practice purposes only. Official CDL requirements and regulations may vary by state - always verify current information with your local DMV or authorized testing center.
How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy
Sources & references
Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy