CDL Practice Tests
Free Commercial Driver's License practice tests for all 8 knowledge areas — General Knowledge, Air Brakes, Hazmat, and every major endorsement. Based on official FMCSA guidelines.
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Every CDL applicant must pass General Knowledge first. Add endorsements based on the vehicle types you will operate.
General Knowledge
RequiredRequired for all CDL applicants. 100 questions covering FMCSA regulations, vehicle inspection, cargo, shifting, and safe driving. 80% to pass.
Air Brakes
Restriction RemovalRemoves the air brake restriction from your CDL. 25 questions on dual air systems, brake inspection, stopping distance, and emergency braking.
Hazmat
EndorsementFederal hazmat endorsement. 30 questions on placarding, shipping papers, loading/unloading, and emergency response procedures.
Passenger
EndorsementBus and passenger vehicle endorsement. 20 questions covering safe passenger transport, on-board procedures, and emergency exits.
School Bus
EndorsementSchool bus endorsement. 20 questions on student loading zones, railroad crossings, emergency evacuation, and school bus-specific rules.
Tanker Vehicles
EndorsementTanker endorsement. 20 questions covering liquid surge, high center of gravity, tank inspections, and safe tanker operation.
Doubles & Triples
EndorsementT endorsement for pulling multiple trailers. 20 questions on coupling/uncoupling, handling, and safe operation of double and triple combinations.
Combination Vehicles
KnowledgeSection 6 of the CDL exam. 20 questions on coupling, uncoupling, and safe operation of tractor-trailer combination vehicles.
CDL Test At a Glance
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