Free Missouri CDL practice test with real commercial driving questions. Prepare for your Missouri CDL exam — General Knowledge, Air Brakes, HazMat, and all endorsements. Updated for 2026.
The Missouri DOR CDL knowledge test has 50 questions for General Knowledge, with additional 20–30 question tests for each endorsement (Air Brakes, HazMat, Tanker, etc.). You need 80% to pass each section. Missouri requires 20 of 25 correct answers at License Offices operated by contractors statewide.
The Missouri DOR knowledge exam tests your understanding of Missouri traffic laws, road signs, and safe driving practices. DriveAce covers every topic you'll encounter on test day.
Vehicle inspection, cargo management, driving techniques, and documentation for Missouri CDL.
Air brake system components, inspection, emergency stops, and maintenance tested by the Missouri DOR.
Hazardous materials classification, placarding, loading/unloading rules for Missouri CDL endorsement.
Liquid surge, rollover prevention, loading and unloading procedures for Missouri tanker endorsement.
Coupling, uncoupling, stability, and safe driving with multiple trailers under Missouri CDL rules.
Passenger safety, school bus operations, railroad crossings, evacuation for Missouri CDL.
The Missouri DOR CDL General Knowledge test has 50 questions. You need 80% (40 correct) to pass. Each CDL endorsement — Air Brakes, HazMat, Tanker, Doubles/Triples, Passenger, School Bus — has an additional 20–30 question test, each also requiring 80%.
DriveAce covers all major Missouri CDL endorsements: General Knowledge, Air Brakes, HazMat (Hazardous Materials), Tanker Vehicles, Doubles/Triples, Passenger Vehicles, and School Bus. All practice questions are based on Missouri DOR CDL requirements.
Yes — DriveAce offers free CDL practice questions for Missouri. Study General Knowledge and endorsement-specific questions that mirror the real Missouri DOR CDL exam. Full access to all practice questions is available for a one-time $19.99 fee.
You need to score 80% on the Missouri CDL General Knowledge test and each endorsement test. DriveAce practice tests use the same 80% passing threshold, so you always know when you're ready for the real exam at the Missouri DOR.
Join thousands of drivers who passed their Missouri CDL exam on the first try with DriveAce. No subscription. No ads. Just the knowledge you need.
Start Free Practice Test →$19.99 one-time for full access. 20 free questions included.