Washington CDL Combination Vehicles: Uncoupling Test 2026

Uncoupling a trailer is its own sequence with its own failure points, and this drill walks through the order Washington's CDL combination exam expects - setting the trailer brakes, lowering the landing gear to just touch the ground, releasing the fifth wheel locking lever, and pulling forward slowly to separate.

Expect questions about what happens if the landing gear isn't properly set before the fifth wheel is released, how to confirm the trailer brakes are actually holding before you disconnect air lines, and the order electrical and air connections should come apart in. Uncoupling questions on the exam often test sequence as much as they test facts.

Work through this uncoupling drill step by step, then check the order against your Washington CDL Manual if anything feels off. Getting this sequence wrong isn't just a test question - it's how trailers end up damaged or dropped in a Washington truck yard.

Keep going:

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

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