Illinois Combination Vehicles CDL Practice 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.
Questions
20
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
Study Tips for Illinois
- 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
Illinois CDL Information
Age Requirements
Intrastate: 18+ · Interstate: 21+
CDL Renewal
Every 4 years
ELDT Required
Yes — ELDT (Entry-Level Driver Training) from FMCSA-registered provider
Illinois Secretary of State
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.
Ready to Pass Your Illinois Combination Vehicles Test?
Practice with real exam questions and detailed explanations.