Career upgrade: Learn practical AI skills for better jobs and higher pay.
Level up
PracticeVideosBlogFlashcardsEspañol
All Practice Exams

200+ Free California CDL Combination Vehicles Test Practice Questions

Pass your California Commercial Driver License Combination Vehicles Test exam on the first try — instant access, no signup required.

✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately
200+ Questions
100% Free
1 / 200
Question 1
Score: 0/0

What is the risk if a trailer is too low before coupling?

A
B
C
D
to track
Same family resources

Explore More CDL Combination Vehicles Test

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

Alabama CDL Combination Vehicles Test

Practice Questions

Alaska CDL Combination Vehicles Test

Practice Questions

Arizona CDL Combination Vehicles Test

Practice Questions

Arkansas CDL Combination Vehicles Test

Practice Questions

Colorado CDL Combination Vehicles Test

Practice Questions

Florida CDL Combination Vehicles Test

Practice Questions
2026 Statistics

Key Facts: California CDL Combination Vehicles Test Exam

20

Combination Test Questions

FMCSA National CDL Program Training

80%

Minimum Passing Score

49 CFR 383.135

3

Knowledge-Test Attempts Per California Application

California DMV

14 days

Minimum CLP Hold Before Skills Test

California DMV

$100

Original California Commercial Class A/B Application Fee

California DMV Licensing Fees

California DMV Section 6 is the core study source for combination vehicles, including driving risks, coupling/uncoupling, and inspection. FMCSA CDL training materials identify the Combination Vehicles test as a 20-question knowledge test for Group A vehicles, and 49 CFR 383.135 requires at least 80% correct. California applicants must pass required knowledge tests before CLP issuance, have three attempts per test on an application, and hold a CLP at least 14 days before skills testing.

Sample California CDL Combination Vehicles Test Practice Questions

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

1Which California CDL class is generally required for a tractor-semitrailer combination with GCWR at least 26,001 pounds and a trailer over 10,000 pounds GVWR?
A.Noncommercial Class C
B.Commercial Class C
C.Motorcycle Class M1
D.Commercial Class A
Explanation: California DMV defines Commercial Class A for legal combinations meeting the 26,001-pound GCWR threshold when the towed unit exceeds 10,000 pounds GVWR.
2Who needs the Combination Vehicles knowledge test in the CDL process?
A.Only motorcycle applicants
B.All passenger-car applicants
C.Applicants seeking Group A or Class A combination-vehicle authority
D.Only drivers renewing a Class C license
Explanation: FMCSA materials tie the Combination Vehicles knowledge test to applicants who want to operate Group A combination vehicles such as tractor-trailers.
3What minimum score is required on each CDL knowledge test under 49 CFR 383.135?
A.60 percent correct
B.80 percent correct
C.70 percent correct
D.A score set by the training school
Explanation: Federal CDL rules require at least 80 percent correct on each knowledge test, including the combination-vehicle portion.
4Before applying for the California CDL skills test, how long must an applicant hold the CLP?
A.At least 14 days
B.At least 24 hours
C.Exactly 30 days
D.No minimum holding period
Explanation: California DMV says a CLP must be held for at least 14 days before applying to take the CDL skills test.
5What trailer part locks into the fifth wheel jaws?
A.The trailer marker lamp
B.The landing gear crank
C.The service glad hand
D.The kingpin
Explanation: The kingpin is the trailer pin that enters the fifth wheel throat and is locked by the jaws during coupling.
6What is the fifth wheel used for on a tractor-semitrailer?
A.It powers the trailer lights
B.It inflates the trailer tires
C.It supports and locks the semitrailer kingpin to the tractor
D.It drains trailer air tanks
Explanation: The fifth wheel is the mechanical coupling plate that supports the trailer front and secures the kingpin.
7What does a tug test verify after coupling?
A.The trailer doors are painted correctly
B.The kingpin is held by the fifth wheel lock
C.The fuel tanks are full
D.The cargo paperwork is complete
Explanation: With trailer brakes set, a gentle pull confirms the tractor does not separate from the trailer and that the coupling is holding.
8What is a high coupling?
A.The kingpin is not properly seated in the fifth wheel jaws, often riding above closed jaws
B.The trailer load is stacked neatly
C.The landing gear is fully raised
D.The trailer lights are mounted high
Explanation: High coupling is dangerous because the trailer can appear attached while the kingpin is not locked correctly.
9Which glad hand color normally identifies the trailer emergency or supply line?
A.White
B.Blue
C.Green
D.Red
Explanation: The red glad hand is used for the trailer emergency or supply line that charges the trailer air system.
10Which glad hand color normally identifies the trailer service line?
A.Yellow
B.Red
C.Blue
D.Orange
Explanation: The blue glad hand is used for the trailer service line that carries brake-application signals.

About the California CDL Combination Vehicles Test Exam

The California CDL Combination Vehicles test is required for applicants seeking Group A/Class A authority to drive tractor-trailers and other combination vehicles. It is based on California Commercial Driver Handbook Section 6 and federal FMCSA CDL standards in 49 CFR Part 383. The test covers safe operation, rollover risk, coupling and uncoupling, fifth wheel and kingpin inspection, trailer air/electric lines, trailer brakes, backing, turning, and combination-specific vehicle inspection.

Assessment

20 multiple-choice Combination Vehicles knowledge questions for Group A/Class A applicants, covering coupling/uncoupling, combination inspection, and operating practices

Time Limit

No separate official time limit published; California DMV says knowledge tests are not administered within 30 minutes of closing

Passing Score

80% minimum under 49 CFR 383.135

Exam Fee

$100 original Commercial Class A/B application; no separate Combination Vehicles-only fee published by DMV (California Department of Motor Vehicles under FMCSA CDL standards)

California CDL Combination Vehicles Test Exam Content Outline

25%

Coupling and Uncoupling

Trailer height, fifth wheel condition, kingpin and locking jaws, tug test, visual inspection, landing gear, release handle, chocks, and line stowage.

20%

Combination Vehicle Inspection

Fifth wheel lower and upper, sliding fifth wheel, air and electric lines, trailer lights, tires, suspension, frame, landing gear, and load security.

20%

Trailer Brakes and Air Lines

Red supply line, blue service line, glad hands, trailer air supply control, tractor protection valve, hand valve use, ABS, leaks, and brake checks.

15%

Safe Turns, Backing, and Space

Off-tracking, tail swing, wide turns, blind spots, mirror checks, backing corrections, spotters, pull-ups, following distance, and gap selection.

15%

Rollover, Skids, and Jackknife

Center of gravity, cargo placement, curve speed, empty-trailer braking, wet roads, trailer swing, skid recovery, jackknife prevention, and downgrade control.

5%

California and FMCSA Rules

Class A/Group A thresholds, 20-question combination test format, 80% pass rule, CLP timing, ELDT, attempts, and tractor-trailer restriction basics.

How to Pass the California CDL Combination Vehicles Test Exam

What You Need to Know

  • Passing score: 80% minimum under 49 CFR 383.135
  • Assessment: 20 multiple-choice Combination Vehicles knowledge questions for Group A/Class A applicants, covering coupling/uncoupling, combination inspection, and operating practices
  • Time limit: No separate official time limit published; California DMV says knowledge tests are not administered within 30 minutes of closing
  • Exam fee: $100 original Commercial Class A/B application; no separate Combination Vehicles-only fee published by DMV

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

California CDL Combination Vehicles Test Study Tips from Top Performers

1Read California Commercial Driver Handbook Section 6 before drilling questions; most testable details come from that section.
2Memorize the coupling safety chain: inspect, align, trailer height, back under, tug test, visual check, connect lines, charge air, test brakes, raise landing gear.
3For trailer skid questions, remember that locked trailer wheels need rolling traction restored before the trailer can come back in line.
4Treat every visible fifth wheel gap, failed tug test, crossed glad hand, or air leak as a stop-and-fix condition.
5Keep California logistics separate from driving technique: CLP issuance follows knowledge tests, CLP hold is at least 14 days, and federal pass score is 80%.

Frequently Asked Questions

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

FMCSA National CDL Program training materials describe the Combination Vehicles test as a 20-question test for Group A combination vehicles. California DMV administers CDL knowledge testing under federal CDL standards.

What score do I need to pass the California CDL Combination Vehicles test?

49 CFR 383.135 requires at least 80% correct on each CDL knowledge test. Failing the combination-vehicle portion below 80% means a Group A CLP or CDL must not be issued.

What should I study for the California Combination Vehicles test?

Study California Commercial Driver Handbook Section 6, especially rollover risks, steering and space, trailer skids, coupling, uncoupling, combination inspection, air/electric lines, and trailer brake checks.

How much does the California CDL Combination Vehicles test cost?

California DMV publishes commercial license application fees rather than a separate Combination Vehicles-only fee. The original Commercial Class A or B application fee is $100.

Do I need ELDT for a California Class A CDL?

Yes. Covered first-time Class A or B applicants and Class B-to-A upgrades must complete federal ELDT. California also requires original Class A/B CDL applicants to complete 15 hours of behind-the-wheel training before CDL issuance.