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Key Facts: Washington CDL Doubles and Triples Endorsement Test Exam
20
Washington DOL Double/triple test questions
Washington DOL CDL knowledge test page
16
Correct answers required to pass
Washington DOL CDL knowledge test page
80%
Federal CDL knowledge-test passing standard
49 CFR 383.135
Knowledge only
Washington Double/triple endorsement test type
Washington DOL CDL knowledge test page and 49 CFR 383.93
Washington doubles/triples applicants take a 20-question DOL Double/triple knowledge test and need 16 correct to pass. DOL lists no skills test needed for the endorsement knowledge test. Study Washington Commercial Driver Guide Section 7 plus Sections 2, 5, and 6, with special attention to converter dollies, coupling and uncoupling order, air-flow checks to the rear trailer, valve positions, rollover prevention, crack-the-whip, rearward amplification, and 49 CFR Part 383.115 knowledge areas.
Sample Washington CDL Doubles and Triples Endorsement Test Practice Questions
Try these sample questions to test your Washington CDL Doubles and Triples Endorsement Test exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 300+ question experience with AI tutoring.
1What endorsement code does Washington use for double and triple trailers?
2How many questions are on Washington's Double/triple CDL knowledge test?
3How many correct answers does Washington require on the 20-question Double/triple test?
4Does Washington list a skills test as needed for the Double/triple endorsement test?
5Which Washington Commercial Driver Guide section covers Doubles and Triples?
6Which sections should doubles/triples applicants also study with Section 7?
7What is a converter dolly used for?
8What dolly part fits into the pintle hook on the trailer ahead?
9After coupling the dolly drawbar, what must be true of the pintle hook?
10What should be done with converter dolly support legs before travel?
About the Washington CDL Doubles and Triples Endorsement Test Exam
The Washington CDL Doubles and Triples Endorsement Test is the DOL knowledge test for drivers seeking T endorsement authority to pull sets of double or triple trailers. Study centers on Washington Commercial Driver Guide Section 7, including converter dollies, pintle hooks, safety chains, support legs, coupling order, rear trailer securement, uncoupling, shut-off valves, service and emergency air lines, glad hands, light cords, dolly ABS indicators, air-flow checks, trailer emergency and service brake tests, rollover prevention, crack-the-whip, rearward amplification, off-tracking, traffic space, speed management, and emergency handling.
Assessment
Washington DOL Double/triple CDL knowledge test with 20 multiple-choice questions; DOL lists 16 correct answers required and no separate skills test needed for this endorsement knowledge test.
Time Limit
No separate official Washington Double/triple-only time limit published by DOL
Passing Score
16 of 20 correct (80%)
Exam Fee
$35 Washington CDL knowledge test; separate CLP, CDL, license update, skills-test, medical, or training costs may apply depending on the applicant's full CDL transaction (Washington State Department of Licensing under FMCSA CDL double/triple trailers endorsement standards)
Washington CDL Doubles and Triples Endorsement Test Exam Content Outline
Endorsement Basics and Washington Logistics
T endorsement purpose, 20-question Washington test format, 16-correct passing score, knowledge-test-only status, score validity, CLP limits, and federal endorsement requirements.
Converter Dolly and Coupling
Converter gear, pintle hook, pintle eye, support legs, safety chains, spare tire securement, rear trailer securement, trailer height, visual coupling checks, and tug tests.
Uncoupling Procedures
Firm level ground, parking brakes, chocks, landing gear, line storage, fifth-wheel release, dolly pullout hazards, and sequence errors that can cause rollaway or equipment movement.
Inspection and Air/Electric Systems
Fifth wheels, kingpins, glad hands, service and emergency lines, shut-off valves, dolly drain valves, ABS indicators, light cords, air-flow checks, tractor protection valve, emergency brakes, and service brake tests.
Stability, Space, Speed, and Emergencies
Rollover prevention, crack-the-whip, rearward amplification, off-tracking, following distance, grades, freeway merging, splash and spray, aerodynamic buffeting, trailer sway, tire failure, and cargo shift.
How to Pass the Washington CDL Doubles and Triples Endorsement Test Exam
What You Need to Know
- Passing score: 16 of 20 correct (80%)
- Assessment: Washington DOL Double/triple CDL knowledge test with 20 multiple-choice questions; DOL lists 16 correct answers required and no separate skills test needed for this endorsement knowledge test.
- Time limit: No separate official Washington Double/triple-only time limit published by DOL
- Exam fee: $35 Washington CDL knowledge test; separate CLP, CDL, license update, skills-test, medical, or training costs may apply depending on the applicant's full CDL transaction
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
Washington CDL Doubles and Triples Endorsement Test Study Tips from Top Performers
Frequently Asked Questions
How many questions are on the Washington CDL Doubles and Triples test?
Washington DOL lists the Double/triple knowledge test as 20 total questions with 16 correct answers required to pass.
Is there a Washington skills test for the doubles/triples endorsement?
No separate skills test is listed for the Double/triple endorsement knowledge test. Washington DOL lists skills test needed as "No" for Double/triple.
What endorsement code is used for doubles and triples in Washington?
Washington DOL lists T as the Double and triple trailers endorsement required for drivers pulling sets of double or triple trailers.
What guide section should I study?
Study Washington Commercial Driver Guide Section 7, Doubles and Triples. The guide also directs applicants to study Sections 2, 5, and 6.
How long are Washington CDL knowledge test scores valid?
Washington DOL says CDL knowledge test scores are valid for 180 days from the date passed, and that double, triple, and hazardous materials cannot be renewed with a CLP and expire 180 days from the date passed.