North Carolina Combination Vehicles CDL Practice Test
Practice with real NC 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
No time limit specified
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
When driving behind another vehicle, under good conditions, you should allow at least one second between your vehicle and the vehicle ahead for each ____ feet of your vehicle length.
Browse North Carolina Combination Vehicles Questions
- 1. When driving behind another vehicle, under good conditions, you should allow at least one second between your vehicle and the vehicle ahead for each ____ feet of your vehicle length.
- 2. After connecting the air lines but before backing under the trailer you should:
- 3. Sudden turns or aggressive braking will have the greatest effect on which trailer?
- 4. What is the purpose of the trailer air supply control?
- 5. Why should you lock the tractor glad hands to each other (or dummy couplers) when you are not towing a trailer?
- 6. Where should the tractor be when you inspect the landing gear after uncoupling the trailer?
- 7. Off-tracking or cheating causes which of these to follow the wider path while making a turn?
- 8. After you have coupled the trailer you should raise the landing gear by first using:
- 9. After you lock the kingpin into the fifth wheel, you should check the connection by:
- 10. Which task is NOT performed during the tractor protection valve test?
Study Tips for North Carolina
- 1Memorize the 7-step coupling procedure: position, back slowly, secure, connect air lines, etc.
- 2Know trailer height limits: 13'6" maximum height on most roads
- 3Learn the crack-the-whip effect: sudden steering with trailers causes jackknifing
- 4Remember the 4-inch rule: trailer should be 4 inches higher than tractor when coupling
- 5Master weight distribution: 34,000 lbs max per tandem, 12,000 lbs max on steer axle
North Carolina 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
North Carolina Division of Motor Vehicles (NCDMV)
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 North Carolina CDL Tests
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