Colorado CDL Combination Test (CO) 2026

4.9 out of 5 (96 votes)
80% Passing score
20 Questions
4 Mistakes allowed
Get ready for your Commercial Driver's License (CDL) combination vehicles endorsement with our Colorado CDL combination practice test. This test is designed to closely replicate the real DMV experience, helping you prepare thoroughly for the actual test. While the DMV doesn't release official questions and answers, our Colorado practice permit test features carefully crafted multiple-choice questions that mirror the format and content of the DMV test. Each combination CDL practice test consists of 20 questions, covering essential topics like coupling and uncoupling, pre-trip inspections, driving techniques, backing and maneuvering, and air brake systems. To pass, you need to answer at least 16 questions correctly. This ensures that you're well-versed in the critical aspects of operating combination vehicles, such as understanding the increased stopping distances required due to their greater weight. Our Colorado DMV practice test provides an authentic practice experience, allowing you to familiarize yourself with the type of questions you'll encounter on the real test. With a large pool of permit test practice questions, you can be confident that you're covering all the necessary topics. This variety helps you understand and remember the essential concepts, giving you the confidence to tackle the real test. One of the key benefits of our Colorado combination vehicle test is the ability to take it multiple times. This means you can practice as much as you need until you feel comfortable with the material. Each attempt will help you get better, reinforcing your knowledge and ensuring you're ready for the actual DMV test. By focusing on these critical areas and providing an authentic practice experience, our Colorado CDL combination practice test is an invaluable tool in your preparation. You'll gain the confidence and knowledge needed to handle the unique challenges of driving combination vehicles safely. Prepare effectively, practice thoroughly, and ensure you're ready to succeed on the road.
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Sample Colorado Combination Test Questions

Question 1

Rearward amplification can turn a quick steering movement at the tractor into greater side-to-side movement at the rear trailer.

  1. A TRUE
  2. B FALSE

Correct answer: A – TRUE

Colorado's CDL manual explains that rearward amplification produces the crack-the-whip effect in combination vehicles. A sudden steering input or quick lane change can create greater movement toward the rear of the combination, increasing rollover risk. Drivers pulling trailers should steer gently and smoothly and reduce speed before entering turns.

Source: Commercial Driver License Manual — § 6.1.2, “Steer Gently”

Question 2

The fifth-wheel jaws have closed around the kingpin, but the locking lever is not in the locked position. What must you do?

  1. A Perform a tug test and begin the trip
  2. B Replace the entire fifth wheel immediately
  3. C Correct the coupling problem before driving
  4. D Slide the fifth wheel to balance the axle weight

Correct answer: C – Correct the coupling problem before driving

During the coupling inspection, verify that the jaws are closed around the kingpin's shank and that the locking lever is in the locked position. The safety latch must also be positioned over the lever when equipped. If any part of the coupling is not correct, do not drive the combination until the problem is corrected.

Source: Commercial Driver License Manual — § 6.4.1, “Coupling Tractor-Semitrailers”

Question 3

Which fifth-wheel component projects from the semitrailer and is held by the locking jaws?

  1. A The kingpin
  2. B The glad hand
  3. C The axle spindle
  4. D The landing-gear pin

Correct answer: A – The kingpin

The kingpin is the pin that attaches a semitrailer to a tractor through the fifth-wheel coupling. When coupling is completed correctly, the fifth-wheel locking jaws close around the shank of the kingpin. The kingpin must be inspected for bending, damage, or excessive wear that could affect the security of the connection.

Source: Commercial Driver License Manual — § 11M, “Kingpin, Apron & Gap”

Question 4

Which action is part of safely preparing to back a trailer?

  1. A Inspect the intended path and use both outside mirrors
  2. B Increase speed to complete the maneuver quickly
  3. C Watch only the mirror on the driver's side
  4. D Proceed without checking side or overhead clearance

Correct answer: A – Inspect the intended path and use both outside mirrors

Colorado's CDL manual instructs drivers to examine the line of travel before backing, including getting out and walking around the vehicle. Check side and overhead clearance and use the outside mirrors on both sides frequently. Back slowly and stop to inspect the path again whenever you are unsure about clearance or position.

Source: Commercial Driver License Manual — § 6.1.7, “Backing with a Trailer”

Question 5

During a coupling inspection, how should the trailer air lines be arranged?

  1. A Properly connected and secured, with enough slack for turns
  2. B Stretched tightly with no available slack
  3. C Disconnected until the combination reaches the roadway
  4. D Hanging where they can contact moving tractor parts

Correct answer: A – Properly connected and secured, with enough slack for turns

Trailer air lines should be connected to the proper glad hands, free of leaks, and safely secured. They need enough slack to allow the tractor and trailer to turn without stretching or pulling apart. The lines must also be protected from moving parts and inspected for cuts, wear, or other damage.

Source: Commercial Driver License Manual — § 6.5.1, “Additional Things to Check During a Walk-around Inspection”

Question 6

Which practices help reduce the risk of a combination-vehicle rollover?

  1. A Keeping the cargo as low as possible
  2. B Driving slowly around turns
  3. C Steering gently and smoothly
  4. D All of the above

Correct answer: D – All of the above

Keeping cargo low reduces the vehicle's center of gravity, and centering the load improves stability. Combination vehicles should be driven slowly around corners, ramps, and other curves. Gentle, smooth steering is also important because sudden movements can create rearward amplification and cause a trailer to tip over.

Source: Commercial Driver License Manual — § 6.1.1, “Rollover Risks”, Commercial Driver License Manual — § 6.1.2, “Steer Gently”

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