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200+ Free Washington CDL Combination Practice Questions

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Key Facts: Washington CDL Combination Exam

20

Washington Combination Questions

Washington DOL CDL knowledge test

16

Correct Answers to Pass

Washington DOL CDL knowledge test

$35

CDL Knowledge Test Fee

Washington DOL Driver licensing fees

180 days

Knowledge Score Validity

Washington DOL CDL knowledge test

14 days

CLP Wait Before Skills Test

Washington DOL CDL skills test

80%

Federal CDL Knowledge Passing Standard

49 CFR Part 383.135

Washington Class A CDL combination applicants must pass the CDL combination (A) knowledge test: 20 questions with 16 correct required. The test is based on the Washington State Commercial Driver Guide and federal CDL standards, with emphasis on Section 6 topics: driving combinations safely, rollover, off-tracking, backing, trailer skids, jackknife prevention, trailer air lines and brakes, fifth wheel and kingpin coupling, landing gear, uncoupling, and combination inspection. Washington lists the CDL knowledge-test fee as $35 and knowledge-test scores as valid for 180 days from the date passed.

Sample Washington CDL Combination Practice Questions

Try these sample questions to test your Washington CDL Combination exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 200+ question experience with AI tutoring.

1Which Washington CDL knowledge test is listed for Class A combination applicants?
A.CDL combination (A)
B.Passenger only
C.Hazardous materials only
D.School bus only
Explanation: Washington DOL lists CDL combination (A) as the knowledge test for Class A combination applicants. Source basis: Washington DOL CDL knowledge-test and fee pages, Washington State Commercial Driver Guide Section 6, FMCSA CDL Manual, and 49 CFR Part 383.
2How many questions are on Washington's CDL combination (A) knowledge test?
A.10
B.20
C.25
D.50
Explanation: Washington DOL lists 20 total questions for the CDL combination (A) knowledge test. Source basis: Washington DOL CDL knowledge-test and fee pages, Washington State Commercial Driver Guide Section 6, FMCSA CDL Manual, and 49 CFR Part 383.
3What score passes Washington's 20-question CDL combination (A) knowledge test?
A.12 correct
B.14 correct
C.16 correct
D.20 correct only
Explanation: Washington DOL lists 16 correct answers as the passing score for the 20-question combination test. Source basis: Washington DOL CDL knowledge-test and fee pages, Washington State Commercial Driver Guide Section 6, FMCSA CDL Manual, and 49 CFR Part 383.
4What fee does Washington DOL list for a CDL knowledge test?
A.$20
B.$40
C.$175
D.$35
Explanation: Washington DOL lists the CDL knowledge test fee as $35; $175 is the CDL skills-test fee. Source basis: Washington DOL CDL knowledge-test and fee pages, Washington State Commercial Driver Guide Section 6, FMCSA CDL Manual, and 49 CFR Part 383.
5What must you do with required CDL knowledge tests before Washington issues a CLP?
A.Pass them
B.Only schedule them
C.Take only a practice test
D.Skip them if trained
Explanation: Washington DOL says you must pass the knowledge test to get a commercial learner's permit. Source basis: Washington DOL CDL knowledge-test and fee pages, Washington State Commercial Driver Guide Section 6, FMCSA CDL Manual, and 49 CFR Part 383.
6How old must a Washington CDL driver be for interstate commercial operation?
A.At least 16
B.At least 21
C.At least 18
D.Any age with a CLP
Explanation: Washington DOL says applicants may apply at 18, but interstate commercial operation requires at least 21. Source basis: Washington DOL CDL knowledge-test and fee pages, Washington State Commercial Driver Guide Section 6, FMCSA CDL Manual, and 49 CFR Part 383.
7How long are Washington CDL knowledge-test scores generally valid from the date passed?
A.30 days
B.90 days
C.180 days
D.Two years
Explanation: Washington DOL says CDL knowledge-test scores are valid for 180 days from the date passed. Source basis: Washington DOL CDL knowledge-test and fee pages, Washington State Commercial Driver Guide Section 6, FMCSA CDL Manual, and 49 CFR Part 383.
8Which official guide should you study for the Washington combination test?
A.A competitor practice-test site
B.A passenger-car-only guide
C.A tire catalog
D.Washington State Commercial Driver Guide
Explanation: Washington DOL tells applicants to study the Commercial Driver Guide for CDL knowledge tests. Source basis: Washington DOL CDL knowledge-test and fee pages, Washington State Commercial Driver Guide Section 6, FMCSA CDL Manual, and 49 CFR Part 383.
9After an original or upgraded CLP, how long must you wait before taking a Washington CDL skills test?
A.14 calendar days
B.24 hours
C.3 days
D.90 days
Explanation: Washington DOL says you must wait 14 calendar days after an original or upgraded CLP before the CDL skills test. Source basis: Washington DOL CDL knowledge-test and fee pages, Washington State Commercial Driver Guide Section 6, FMCSA CDL Manual, and 49 CFR Part 383.
10Which language rule does Washington publish for CDL knowledge testing?
A.Any interpreter may translate
B.The test is available in four listed languages and interpreters are not allowed
C.Only English is offered
D.The combination test is oral only
Explanation: Washington DOL lists English, Spanish, Russian, and Serbian-Croatian for CDL knowledge tests and says interpreters are not allowed. Source basis: Washington DOL CDL knowledge-test and fee pages, Washington State Commercial Driver Guide Section 6, FMCSA CDL Manual, and 49 CFR Part 383.

About the Washington CDL Combination Exam

The Washington CDL Combination Vehicles Test is the knowledge test for drivers seeking Class A commercial driving privileges for qualifying tractor-trailer and other combination vehicles. Washington DOL lists the CDL combination (A) knowledge test as 20 questions with a 16-correct passing score, and the Washington State Commercial Driver Guide Section 6 supplies the tested combination-vehicle material. Study fifth wheel and kingpin coupling, trailer height, tug and visual checks, landing gear, air and electrical lines, trailer brakes, off-tracking, rollover prevention, backing, trailer skids, jackknife recovery, speed, space management, and combination inspection.

Assessment

Washington DOL-administered multiple-choice CDL knowledge test for Class A combination applicants; Washington lists CDL combination (A) as 20 total questions with 16 correct required to pass.

Time Limit

Washington DOL does not publish a separate time limit for the CDL combination (A) knowledge test

Passing Score

16 correct out of 20 questions (80 percent)

Exam Fee

$35 CDL knowledge test fee (Washington State Department of Licensing)

Washington CDL Combination Exam Content Outline

State/federal logistics

Washington CDL Basics

Washington CDL combination (A) test count, 16-of-20 passing score, $35 CDL knowledge-test fee, CLP score validity, age, medical self-certification, ELDT, and 14-day skills-test wait.

Core section

Driving Combination Vehicles Safely

Rollover risk, high center of gravity, steering response, off-tracking, wide turns, low-clearance crossings, backing, trailer swing, jackknife recovery, speed, and space management.

Core section

Combination Vehicle Air Brakes

Trailer hand valve, tractor protection valve, trailer air supply control, service and emergency lines, glad hands, crossed-line faults, trailer ABS, leaks, and trailer brake tests.

Core section

Coupling and Uncoupling

Fifth wheel, kingpin, locking jaws, trailer height, high coupling, tug test, visual lock check, landing gear, chocks, air/electric line stowage, and safe release sequence.

Core section

Inspecting Combinations

Coupling area, fifth wheel mounting, locking pins, kingpin, apron, gap, trailer frame, suspension, tires, brakes, lights, reflectors, landing gear, cargo security, and pre-departure checks.

How to Pass the Washington CDL Combination Exam

What You Need to Know

  • Passing score: 16 correct out of 20 questions (80 percent)
  • Assessment: Washington DOL-administered multiple-choice CDL knowledge test for Class A combination applicants; Washington lists CDL combination (A) as 20 total questions with 16 correct required to pass.
  • Time limit: Washington DOL does not publish a separate time limit for the CDL combination (A) knowledge test
  • Exam fee: $35 CDL knowledge test fee

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 Combination Study Tips from Top Performers

1Memorize Washington DOL logistics: CDL combination (A) has 20 questions, 16 correct to pass, and the CDL knowledge test fee is $35.
2Read Washington CDL Guide Section 6 and write out the coupling sequence from fifth wheel inspection through wheel-chock removal.
3Practice identifying high-coupling clues: trailer too high, visible apron-to-fifth-wheel gap, and jaws not closed around the kingpin.
4Drill glad hand functions: red is emergency/supply, blue is service, and crossed lines or leaks must be fixed before driving.
5Tie every control question back to safety: slow before curves, leave extra following distance, avoid abrupt steering, and release brakes during a locked-wheel trailer skid.
6Use the Washington DOL pages before test day to confirm appointment rules, score validity, fees, and CLP/skills-test timing.

Frequently Asked Questions

How many questions are on the Washington CDL Combination Vehicles test?

Washington DOL lists CDL combination (A) as 20 total questions with 16 correct required to pass. That is an 80 percent score.

What should I study for the Washington CDL combination test?

Study the Washington State Commercial Driver Guide, especially Section 6 on combination vehicles. Focus on safe driving, rollover, off-tracking, backing, trailer brakes and air lines, coupling, uncoupling, fifth wheel, kingpin, landing gear, and combination inspection.

How much does the Washington CDL knowledge test cost?

Washington DOL lists the CDL knowledge test fee as $35. CLP, skills-test, license, transfer, and endorsement fees are separate and vary by transaction.

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, with a limited additional 180 days when the CLP is renewed within the stated window.

When can I take the Washington CDL skills test after getting a CLP?

Washington DOL says you must wait 14 calendar days after an original or upgraded CLP is issued before taking the CDL skills test, and required training must be completed and entered.

Does the Washington CDL combination test replace the air brakes test?

No. Combination vehicles and air brakes are separate knowledge areas. Most tractor-trailers use air brakes, so Class A applicants commonly need air-brake knowledge as well as the combination test to avoid restrictions.