State CDL preparation
Oregon CDL tests
Choose a category, then study with practice tests, flashcards, or exam simulation. Use the current official Oregon CDL manual as your primary source.
Official government resource
Oregon CDL manual
Open the official state licensing-agency page to read or download the latest Commercial Driver License manual. State agencies may update or replace their PDF without notice.
Select a category
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Required for every CDL applicant
General Knowledge
Core commercial-driving rules, safe operation, emergencies, cargo, communication, and vehicle control.
Choose learning mode →For vehicles equipped with air brakes
Air Brakes
Air-brake components, inspections, warning devices, stopping, and safe brake operation.
Choose learning mode →For Class A tractor-trailer applicants
Combination Vehicles
Coupling, uncoupling, trailer control, rollover prevention, and combination-vehicle inspection.
Choose learning mode →For the H endorsement
Hazardous Materials
Hazard classes, shipping papers, placards, loading rules, emergencies, and secure transportation.
Choose learning mode →For the N endorsement
Tanker Vehicles
Liquid surge, outage, smooth control, inspection, and safe operation of tank vehicles.
Choose learning mode →For the P endorsement
Passenger Vehicles
Passenger safety, loading, prohibited practices, emergency equipment, and vehicle inspection.
Choose learning mode →For the S endorsement
School Bus
Student loading, danger zones, warning systems, railroad crossings, and emergency procedures.
Choose learning mode →For the T endorsement
Doubles & Triples
Converter dollies, coupling order, inspections, handling, and preventing trailer rollover.
Choose learning mode →Prepare for the vehicle inspection test
Pre-Trip Inspection
Engine compartment, cab checks, brakes, lights, coupling, tires, suspension, and safety equipment.
Choose learning mode →