Free Oklahoma CDL practice test with real commercial driving questions. Prepare for your Oklahoma CDL exam — General Knowledge, Air Brakes, HazMat, and all endorsements. Updated for 2026.
The Oklahoma DPS 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. Oklahoma has one of the lowest DMV permit fees in the country at just $4.
The Oklahoma DPS knowledge exam tests your understanding of Oklahoma 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 Oklahoma CDL.
Air brake system components, inspection, emergency stops, and maintenance tested by the Oklahoma DPS.
Hazardous materials classification, placarding, loading/unloading rules for Oklahoma CDL endorsement.
Liquid surge, rollover prevention, loading and unloading procedures for Oklahoma tanker endorsement.
Coupling, uncoupling, stability, and safe driving with multiple trailers under Oklahoma CDL rules.
Passenger safety, school bus operations, railroad crossings, evacuation for Oklahoma CDL.
The Oklahoma DPS 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 Oklahoma CDL endorsements: General Knowledge, Air Brakes, HazMat (Hazardous Materials), Tanker Vehicles, Doubles/Triples, Passenger Vehicles, and School Bus. All practice questions are based on Oklahoma DPS CDL requirements.
Yes — DriveAce offers free CDL practice questions for Oklahoma. Study General Knowledge and endorsement-specific questions that mirror the real Oklahoma DPS CDL exam. Full access to all practice questions is available for a one-time $19.99 fee.
You need to score 80% on the Oklahoma 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 Oklahoma DPS.
Join thousands of drivers who passed their Oklahoma 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.