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WA-CDL Cheat Sheet 2026: One-Page Review of Must-Know Facts

TL;DR
  • Class A requires passing General Knowledge (40/50), Combination Vehicles (16/20), and Air Brakes (20/25).
  • The knowledge-test fee is $35 per attempt within a 90-day window; passed scores stay valid 180 days.
  • The CLP costs $40, is valid 180 days, and must be held 14 days minimum before skills testing.
  • Class A needs 160 training hours; Class B needs 80, both tied to ELDT completion.

Quick Facts Snapshot

If you only have five minutes before heading to the driver licensing office, this is the page to bookmark. It condenses everything the WA-CDL Study Guide 2026: How to Pass on Your First Attempt covers in depth into a single scannable reference. Every number below comes straight from Washington State Department of Licensing testing rules - no guesswork, no borrowed figures from other credentials.

What WA-CDL Actually Tests: The Washington CDL Permit Test verifies you know general trucking rules, air brake systems, and how to safely operate combination vehicles before the state issues a Commercial Learner's Permit (CLP). It is a knowledge exam, not a road test.

Fees, Validity Windows & Timelines

Money and deadlines trip up more applicants than the actual questions do. Keep these numbers straight:

  • $35 knowledge-test fee - covers one attempt at each required test, and that attempt must happen within a 90-day window.
  • 180 days - how long a passed knowledge-test score stays valid before you'd need to retest.
  • $40 - the Commercial Learner's Permit (CLP) fee.
  • 180 days - CLP validity period.
  • 14 days - minimum time you must hold the CLP before you're eligible to take the skills test.

For a full breakdown of how these fees stack up against training costs and re-test scenarios, see WA-CDL Certification Cost 2026: Complete Pricing Breakdown. And if you want the exact calendar logic behind the 90-day and 180-day windows, the WA-CDL Exam Dates 2026: Testing Windows, Deadlines & Scheduling guide maps it out week by week.

Key Takeaway

Book your knowledge tests close together - the 90-day attempt window and 180-day score validity mean procrastinating between General Knowledge and Air Brakes can force a costly retest cycle.

The Three Knowledge Test Domains

Washington's Class A knowledge testing is built from three distinct domains. Each has its own question count and its own passing threshold - treat them as three separate mini-exams, not one combined test.

Domain 1: General Knowledge

50 questions, 40 correct required. This is the foundation exam every CDL applicant takes, covering vehicle inspection, basic control, shifting, backing, and general driving rules that apply across all classes.

  • Pre-trip inspection sequence and purpose
  • Speed management and space management on grades
  • Hazard perception and emergency maneuvers

Domain 2: Air Brakes

25 questions, 20 correct required. Skip this test only if your vehicle uses hydraulic brakes exclusively - otherwise it's mandatory for anyone driving air-braked equipment.

  • Dual air brake system components and warning devices
  • Air loss rates and low-pressure warning thresholds
  • Parking brake and emergency brake application logic

Domain 3: Combination Vehicles

20 questions, 16 correct required. Required for any Class A applicant pulling trailers.

  • Coupling and uncoupling procedures
  • Trailer air brake and emergency air line function
  • Combination vehicle stability, off-tracking, and rollover risk

For a deeper walkthrough of how these three areas interact and which one candidates underestimate most, read WA-CDL Exam Domains 2026: Complete Guide to All 3 Content Areas. If you're still deciding how tough this really is compared to what you expected, How Hard Is the WA-CDL Exam? Complete Difficulty Guide 2026 breaks down the honest difficulty level domain by domain.

DomainTotal QuestionsCorrect Needed to Pass
General Knowledge5040
Air Brakes2520
Combination Vehicles2016

Eligibility & Documentation Checklist

Before you even sit down at a testing terminal, confirm you meet every one of these conditions. Washington DOL will not process your application if any item is missing.

  • At least 18 years old (21 required for interstate operation)
  • Hold a valid Washington driver license
  • Provide approved citizenship or lawful-residency documentation
  • Satisfy medical certification and self-certification requirements
  • Complete applicable Entry-Level Driver Training (ELDT) before testing
Residency Restriction: DOL has stopped all non-domicile CLP and CDL transactions. If Washington isn't your state of domicile, you cannot complete these transactions here - plan your permit and license process in your home state instead.

The full prerequisite list, including how documentation requirements interact with ELDT scheduling, is covered in WA-CDL Requirements 2026: Eligibility, Prerequisites & How to Qualify. If you're still unclear on what a Washington CDL actually authorizes you to drive, start with What Is WA-CDL? or WA-CDL Meaning for the plain-language explanation.

Training Hour Requirements

Washington layers state-specific training hour minimums on top of federal ELDT requirements:

  • Class A: at least 160 total training hours
  • Class B: at least 80 total training hours

These hours must be logged through an approved training provider and align with your ELDT curriculum before you're cleared for skills testing. See WA-CDL Training for how to find a provider and structure these hours around your knowledge-test schedule.

Passing Score Cheat Sheet

Memorize this table. It's the single most-searched piece of information among WA-CDL applicants, and it's worth having it exact rather than approximate.

RequirementValue
General Knowledge minimum40 of 50 correct
Air Brakes minimum20 of 25 correct
Combination Vehicles minimum16 of 20 correct
Knowledge-test fee$35 per attempt (90-day window)
Passed score validity180 days
CLP fee / validity$40 / 180 days
Minimum hold before skills test14 days

For the reasoning behind why these specific thresholds exist and how they compare across classes, read WA-CDL Passing Score 2026: Exactly What You Need to Pass. And if you're curious how many applicants actually clear these bars on their first try, WA-CDL Pass Rate 2026: What the Data Shows has the current picture.

One-Week Cram Schedule

If your CLP eligibility window is closing fast, sequence your review so the hardest, most technical domain gets the most repetition. Air Brakes tends to require the most memorization of numeric thresholds and system names, so front-load it.

Days 1-2

General Knowledge

  • Run full practice sets until consistently above the 40/50 line
  • Drill pre-trip inspection order and terminology
Days 3-4

Air Brakes

  • Memorize air pressure warning levels and dual system parts
  • Practice until scoring above 20/25 with margin to spare
Days 5-6

Combination Vehicles

  • Review coupling/uncoupling steps in exact sequence
  • Target consistent scores above 16/20
Day 7

Mixed Review & Scheduling

This condensed schedule works best as a supplement to, not a replacement for, the full multi-week plan in the WA-CDL Study Guide 2026: How to Pass on Your First Attempt. Using timed practice sessions on our practice test platform before each domain deadline is the fastest way to know if you're actually ready or just familiar.

Common Pitfalls to Avoid

  • Letting scores expire: A passed test is only good for 180 days - don't pass Air Brakes in January and forget to schedule Combination Vehicles until August.
  • Skipping the 14-day CLP hold: You cannot rush to skills testing before two weeks pass, so plan backward from your intended license date.
  • Assuming residency doesn't matter: Non-domicile applicants cannot complete CLP or CDL transactions in Washington right now.
  • Under-logging training hours: 160 hours for Class A and 80 for Class B are floors, not suggestions tied to ELDT completion.
  • Treating all three domains as equal weight: Air Brakes and Combination Vehicles have fewer questions but tighter margins for error than General Knowledge.

Key Takeaway

Print this cheat sheet's scoring table and keep it next to your practice sessions - knowing the exact correct-answer thresholds keeps your study time focused instead of open-ended.

Once you're certified, it's worth understanding what the credential actually opens up. See WA-CDL Jobs for who hires Class A and Class B drivers in Washington, WA-CDL Salary Guide 2026: Complete Earnings Analysis for earnings context, and Is the WA-CDL Certification Worth It? Complete ROI Analysis 2026 for the bigger-picture return on the time and fees invested.

Frequently Asked Questions

How much does the WA-CDL knowledge test cost per attempt?

The knowledge-test fee is $35, and it covers one attempt at each required test within a 90-day window.

How long is a passed knowledge test score valid in Washington?

A passed score stays valid for 180 days, the same validity period as the Commercial Learner's Permit itself.

What's the passing score for each domain?

General Knowledge requires 40 of 50 correct, Air Brakes requires 20 of 25 correct, and Combination Vehicles requires 16 of 20 correct.

How soon after getting my CLP can I take the skills test?

You must hold the CLP for at least 14 days before you're eligible to take the skills test.

Can out-of-state residents get a Washington CLP or CDL right now?

No. DOL has stopped all non-domicile CLP and CDL transactions, so Washington testing is currently limited to state residents.

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