OR CDL Combination

It tests knowledge needed to operate a combination vehicle: pre-trip inspection and coupling/uncoupling, safe driving with turns, braking, speed and space management, air brake checks, skid control and rollover prevention, and cargo securement and weight distribution. Expect multiple-choice questions drawn from the combination vehicles and air brakes sections of the Oregon CDL manual.

The Oregon DMV page used as the basis for this material does not state the question count or passing score, so treat any specific number you hear as unverified. Check the CDL Tests page on oregon.gov/odot/dmv or call DMV at 1-503-945-5000 before your appointment so you know exactly what to expect.

Neither the time limit nor the fee is given on the Oregon DMV CDL page this material was built from. Fees and testing arrangements can change, so confirm the current amount and any appointment requirements directly with DMV rather than relying on secondhand figures.

Oregon's retake and waiting-period rules are not stated on the CDL page used here, so this cannot be answered from the source. Ask DMV staff when you schedule or when you receive your result; they can tell you whether a waiting period or additional fee applies before you can test again.

Oregon's CDL pages separate getting a CDL or CLP, CDL tests, qualifying for a CDL, and required identity documentation into distinct steps. In practice you generally complete permitting requirements before knowledge testing, but confirm the exact order and documents with DMV, since the page does not spell out the sequence.

Oregon's CDL site includes an Entry Level Driver Training (ELDT) section alongside CDL tests and medical examination information, which indicates ELDT is part of the overall process for applicable drivers. Whether it applies to you depends on your situation, so verify your obligations with DMV or your training provider before testing.

Weak spots tend to be the air brake checks and the coupling/uncoupling order, because those are memorized sequences rather than concepts. Skid and rollover questions also trip people who confuse which axle loses traction first. Practicing the sequences aloud and studying why each step exists fixes most of these errors.

Start with the pre-trip inspection and coupling/uncoupling sequence, then air brakes, then safe driving topics like turns, braking distance and space management, and finish with skid control, jackknifing, rollover prevention and cargo securement. Inspection and brake knowledge underpin everything else, so building those first makes the driving sections easier.

Oregon DMV posted a notice that effective March 16, 2026, it no longer issues or reinstates limited-term (non-domiciled) CDLs and CLPs. That date was in the future when this source was retrieved, so check the current notice on the Oregon DMV CDL page for your situation.