Missouri (MO) CDL Practice Tests
Earning a Minnesota Commercial Driver’s License (CDL) starts with passing the required written knowledge exams. This page features Minnesota CDL practice tests designed to help drivers evaluate their understanding of essential CDL topics, including vehicle control, braking systems, and combination vehicle operation.
By using practice questions as part of your study routine, you can identify weak areas before taking the official Minnesota CDL knowledge test. These resources are especially helpful for first-time CDL applicants who want to approach the exam with greater confidence and familiarity.
Missouri (MO) CDL applicants can use these five practice questions to review key exam topics and get ready for the Commercial Learner’s Permit (CLP) written test..
Question 1
What is the best way to determine how many seconds of following distance you have?
Question 2
In which situation should you use your vehicle’s horn?
Question 3
When stopped on a hill, what is the proper way to start moving without rolling back?
Question 4
Total stopping distance is a combination of:
Question 5
What is the minimum tire tread depth required for front tires?
Missouri CDL Practice Tests: General Knowledge, Combination Vehicle & Air Brakes
Drivers preparing for a Missouri Commercial Driver’s License (CDL) should focus on three core CDL practice tests. These tests align with the written knowledge exams administered by the Missouri Department of Revenue (DOR).
- General Knowledge CDL Practice Test
- Combination Vehicle CDL Practice Test
- Air Brakes CDL Practice Test
Using CDL practice tests alongside the official Missouri CDL manual can help reinforce key concepts and improve readiness for the state knowledge exams.
Preparing for the Missouri CDL Exam
Commercial driver licensing standards are established at the federal level by the Federal Motor Carrier Safety Administration (FMCSA). Each state is responsible for administering CDL testing and licensing.
In Missouri, CDL licensing and testing are handled by the Missouri Department of Revenue (DOR). The DOR publishes the official CDL manual used for written and skills testing:
The Missouri CDL manual applies to all commercial license classes, including:
- Class A CDL
- Class B CDL
- Class C CDL
Missouri CDL Eligibility Requirements
Age Requirements:
You must be at least 18 years old to obtain a CDL for intrastate (Missouri-only) driving.
You must be at least 21 years old to operate interstate or transport hazardous materials.
Valid Missouri Driver’s License
You must hold a valid Missouri non-commercial driver’s license before applying for a CDL.
Medical Certification
All Missouri CDL applicants must pass a DOT physical examination conducted by a certified medical examiner listed on the National Registry.
FMCSA medical certification requirements
CDL Knowledge Tests and Endorsements
Applicants must pass written knowledge tests covering general CDL topics, air brakes (if applicable), and any endorsements required for their intended type of driving.
Common CDL endorsements include:
- Hazardous Materials (H)
- Tank Vehicles (N)
- Passenger (P)
- School Bus (S)
Entry-Level Driver Training (ELDT)
Federal Entry-Level Driver Training (ELDT) requirements apply to many Missouri CDL applicants. ELDT includes classroom instruction and behind-the-wheel training completed through an FMCSA-registered provider.
ELDT is required for:
- First-time CDL applicants
- Drivers upgrading from Class B to Class A
- Applicants adding Hazardous Materials (H), Passenger (P), or School Bus (S) endorsements
FMCSA Training Provider Registry
Background Checks and Documentation
Certain endorsements, including Hazardous Materials, require a federal background check. Applicants must also provide documentation verifying identity, Missouri residency, and lawful U.S. presence.
Missouri CDL Application Process
CDL applications must be completed in person at a Missouri license office.
Missouri CDL application and testing information
Missouri CDL Fees
CDL fees in Missouri are set by the Missouri Department of Revenue and may vary based on license class, endorsements, and testing requirements.
- Commercial Learner’s Permit (CLP): Fee required at time of application
- New or Renewed CDL (Class A, B, or C): Fees vary based on license type and duration
- Skills Test: Additional testing fees may apply depending on testing provider
Additional costs may apply for endorsement testing or background checks, such as fingerprinting for Hazardous Materials endorsements.
This page was updated on: 1/9/2026