Missouri CDL Practice Test 2026
The Missouri CDL knowledge test covers 50 questions on commercial vehicle operation, safety regulations, and pre-trip inspections. A 80% score is required to pass. Start with a free CDL practice test to gauge your readiness.
Last verified May 2026 · Missouri Commercial Driver License Manual
How we help you prepare
9 CDL test sections - 35-159 questions each. Pick a section to start a focused practice test or drill - each one mirrors a real Missouri DOR CDL exam section.
Missouri requirement to pass
50 questions on the real test, 80% passing score (40 of 50), no time limit
Set your CDL goal
We'll focus your study path and IQ Readiness Score on what you actually need.
License class
Endorsements
Optional
Combined endorsements
Missouri CDL test sections
The Missouri CDL exam is made up of a general knowledge test plus separate endorsement and section tests. Pick a section to start a focused practice test or drill.
Practice Runs
Complete practice runs to test your knowledge. Runs 1-2 are free.
Missouri CDL Test 1: General Knowledge
Safe driving techniques, vehicle systems, cargo basics, hours of service
Missouri CDL Test 2: Air Brakes & Pre-Trip
Air brake systems, inspection procedures, stopping distances, pre-trip checklist
Pro Study Tools
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Missouri CDL Exam Simulator 2026
ProIQ Readiness Score™ Analysis
ProMissouri CDL Quick Quiz
ProKnow exactly when you're ready
The IQ Readiness Score™ measures six dimensions of CDL test readiness: memory stability, test performance, content coverage, recent accuracy, difficulty mastery, and reaction speed.
About the Missouri CDL Knowledge Test
To obtain a Commercial Driver's License in Missouri, you must first pass the CDL general knowledge written test administered by the DOR. The general knowledge exam consists of 50 multiple-choice questions covering vehicle inspection, basic control, safe driving, transporting cargo, and federal regulations. A score of 80% or higher (40 correct) is required to pass.
CDL Classes and Endorsements
Missouri issues three CDL classes. Class A covers combination vehicles over 26,001 lbs GVWR when the towed unit exceeds 10,000 lbs - this is what you need for tractor-trailers and most heavy hauling. Class B covers single vehicles over 26,001 lbs such as straight trucks, large buses, and dump trucks. Class C covers vehicles designed for 16+ passengers or those carrying hazardous materials that don't meet Class A or B criteria.
Beyond the general knowledge test, you may need additional written tests for endorsements: Hazardous Materials (H), Tanker (N), Passenger (P), School Bus (S), Doubles/Triples (T), or the combined HazMat-Tanker (X). Each endorsement requires its own written exam, and HazMat also requires a TSA background check.
Entry-Level Driver Training (ELDT)
Since February 2022, federal law requires Entry-Level Driver Training (ELDT) through an FMCSA-registered training provider before you can take the CDL skills test for a Class A or B CDL. ELDT is also required before adding Hazardous Materials, Passenger, or School Bus endorsements. This applies in Missouri and every other state.
Where to Take the Test
The CDL knowledge test is taken at a Missouri State Highway Patrol driver examination station Note: the written test is taken at Highway Patrol stations, not DOR license offices.. Walk-ins are typically accepted, though scheduling ahead is recommended. The test is available in English, Spanish, Chinese, French. Results are delivered immediately - pass/fail shown after completing the test.
Preparing for Your CDL Test
The CDL test draws from the Missouri CDL Manual and the federal Motor Carrier Safety Regulations. Key topics include pre-trip vehicle inspection procedures, air brake systems, coupling and uncoupling, cargo securement, hours-of-service rules, hazard perception, and accident procedures. Missouri-specific regulations on weight limits, required permits, and designated truck routes may also appear.
Taking practice tests before your appointment is one of the most effective ways to prepare. Focus on understanding road signs and the concepts behind each question rather than memorizing answers - the real test may phrase questions differently than what you studied.
Retake Policy
Can retake the next business day. After 3 failures within 90 days, the application is closed and you must restart the process.
How hard is Missouri's CDL test, really?
14th hardest of 51.
Know exactly when you're ready
The IQ Readiness Score™ measures six dimensions of CDL test readiness: memory stability, test performance, content coverage, recent accuracy, difficulty mastery, and reaction speed.