California Combination Vehicles CDL Practice Test
Practice with real CA Combination Vehicles exam questions and detailed explanations. Rated 4.8 stars by 1,000+ drivers.
Written by CDL holders and exam prep experts · Updated April 2026
Free Questions
10
Passing Score
80%
Time Limit
30 minutes
Prerequisites
General Knowledge and Air Brakes tests must be completed first
What is the Combination Vehicles Test?
The Combination Vehicles test is required to obtain a Class A CDL, which allows you to drive truck-trailer combinations where the trailer weighs more than 10,000 pounds. This test covers the skills and knowledge needed to safely operate tractor-trailers and other combination vehicles.
Required for Class A CDL (tractor-trailers)
Topic Breakdown
Coupling and Uncoupling
~6 questions
- Pre-coupling inspection procedures
- Proper coupling techniques
- Safe uncoupling procedures
Vehicle Inspection
~5 questions
- Trailer inspection procedures
- Fifth wheel and kingpin checks
- Air line and electrical connections
Driving Techniques
~5 questions
- Backing with trailers
- Turning and cornering safely
- Managing trailer swing
Safety Considerations
~4 questions
- Rollover prevention
- Brake usage and stopping distance
- Weight distribution effects
Free Practice Questions
10 questionsQuestion 1 of 10
After you lock the kingpin into the fifth wheel, you should check the connection by:
Browse California Combination Vehicles Questions
- 1. After you lock the kingpin into the fifth wheel, you should check the connection by:
- 2. There are two things that a driver can do to prevent a rollover. They are: (1) keep the cargo as close to the ground as possible and (2):
- 3. Why should you be sure that the fifth wheel plate is greased as required?
- 4. What is the purpose of the trailer air supply control?
- 5. The crack-the-whip effect is related to:
- 6. Glad hands are usually connecting which of these?
- 7. What is the most common cause of a tractor-trailer jackknife?
- 8. Off-tracking or cheating causes which of these to follow the wider path while making a turn?
- 9. Which task is NOT performed during the tractor protection valve test?
- 10. Which part of the kingpin should the locking jaw close around?
Study Tips for California
- 1Practice coupling and uncoupling procedures step-by-step
- 2Learn the fifth wheel inspection points thoroughly
- 3Study trailer backing techniques and reference points
- 4Understand weight distribution and bridge laws
- 5Review California combination vehicle regulations
- 6Understand California bridge laws and weight restrictions
California CDL Information
Age Requirements
Intrastate: 18+ · Interstate: 21+
CDL Renewal
Every 5 years
ELDT Required
Yes — ELDT (Entry-Level Driver Training) from FMCSA-registered provider
California DMV
Official CDL Portal →Career Opportunities
Frequently Asked Questions
You need to pass the Combination Vehicles test to obtain a Class A CDL, which allows you to drive truck-trailer combinations where the trailer weighs more than 10,000 pounds.
Combination Vehicles Study Resources
Other California CDL Tests
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