Washington CDL Practice Test 2026 & Washington DOL Rules
Prepare for your commercial driver's license with the official Washington exam curriculum. TruckerPass combines the 985 federal FMCSA questions with Washington-specific commercial vehicle limits, air brake testing, and the 2026 Modernized Pre-Trip inspection.
Washington Cascade Mountain Passes & Tire Chain Laws
- WAC 204-24-050 mandates carrying tire chains on Snoqualmie Pass (I-90) and Stevens Pass (US-2) between November 1 and April 1.
- Commercial vehicles with gross weight ≥ 10,000 lbs must install chains when 'Chains Required' advisory signs are illuminated.
- Washington State Patrol Commercial Vehicle Division enforces strict brake adjustment and pushrod stroke limits.
- Washington DOL requires an 80% passing score on the 50-question General Knowledge exam.
Official Washington Test Format
- Licensing Agency: Washington State Department of Licensing (DOL)
- General Knowledge: 50 questions, 80% to pass (at least 40 correct).
- Air Brakes Endorsement: 25 questions, 80% to pass (required for air-equipped rigs).
- Combination Vehicles: 20 questions, 80% to pass (Class A tractor-trailers).
- Modernized Pre-Trip Inspection: 4-Zone component walkaround + 4-Step air brake test.
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