Free Tennessee CDL practice test with real commercial driving questions. Prepare for your Tennessee CDL exam — General Knowledge, Air Brakes, HazMat, and all endorsements. Updated for 2026.
The Tennessee DDS 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. Tennessee's DDS requires 24 of 30 correct answers to pass the written permit test.
The Tennessee DDS knowledge exam tests your understanding of Tennessee 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 Tennessee CDL.
Air brake system components, inspection, emergency stops, and maintenance tested by the Tennessee DDS.
Hazardous materials classification, placarding, loading/unloading rules for Tennessee CDL endorsement.
Liquid surge, rollover prevention, loading and unloading procedures for Tennessee tanker endorsement.
Coupling, uncoupling, stability, and safe driving with multiple trailers under Tennessee CDL rules.
Passenger safety, school bus operations, railroad crossings, evacuation for Tennessee CDL.
The Tennessee DDS 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 Tennessee CDL endorsements: General Knowledge, Air Brakes, HazMat (Hazardous Materials), Tanker Vehicles, Doubles/Triples, Passenger Vehicles, and School Bus. All practice questions are based on Tennessee DDS CDL requirements.
Yes — DriveAce offers free CDL practice questions for Tennessee. Study General Knowledge and endorsement-specific questions that mirror the real Tennessee DDS CDL exam. Full access to all practice questions is available for a one-time $19.99 fee.
You need to score 80% on the Tennessee 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 Tennessee DDS.
Join thousands of drivers who passed their Tennessee 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.