Oregon CDL Combination Vehicles: Uncoupling Test 2026

Separating a tractor from a trailer safely takes as much care as coupling did, and this uncoupling drill covers the order that keeps the trailer from dropping. You will practice positioning the rig, lowering the landing gear until it just supports the load, disconnecting the air and electrical lines, and releasing the fifth wheel lock before easing the tractor forward. These CDL combination uncoupling steps prevent an expensive and dangerous mistake.

The questions emphasize supporting the trailer weight properly, chocking the wheels when needed, and confirming the area is clear before you pull out. Getting this sequence right is a standard expectation on an Oregon combination vehicle test.

Since the scored question count is a state decision, check the current figure in your Oregon CDL Manual before test day. Rehearse this uncoupling procedure until it flows without hesitation, then pull everything together with the combination practice test for 2026.

Keep going:

• Oregon CDL Combination Practice Test
• Oregon CDL Combination Practice Test 2
• Oregon CDL Combination Practice Test 3
• Oregon CDL Combination Vehicles Test
• Oregon CDL Practice Test
• Oregon Air Brakes Practice Test
• Oregon CDL Pre-Trip Inspection Practice Test
• Oregon Hazmat Practice Test
• Oregon Class A CDL Practice Test
• Oregon CDL Practice Test

Every question traces back to the Oregon CDL Manual - skim the right-of-way and signs chapters before your retake.