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CO CDL Combination Vehicles Practice Test 4 2025

Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements.

Colorado winters can be harsh and unforgiving, creating serious challenges for beginner drivers. From September through May, commercial drivers are required to carry tire chains when their route goes through mountain corridors. If a truck gets stuck and blocks traffic without proper equipment, the fines can be just as steep as the grades. The official Commercial Driver License Manual (Colorado CDL Handbook 2025) describes safe driving practices for combination vehicles, jackknife prevention, and handling emergency situations. Please read its contents multiple times to familiarize yourself with this subject.

To legally drive combination vehicles with a gross combination weight rating (GCWR) of 26,001 pounds or more, where the trailer itself weighs over 10,000 pounds, you must pass the official combination vehicles knowledge exam and meet several other requirements. This exam is based on Section 6 (Combination Vehicles) of the official Commercial Driver License Manual. You must score 80% or higher to pass, leaving little room for error. Upon passing, you will receive a CLP (Commercial Learner’s Permit), which you can use to practice driving combination vehicles under the supervision of a full Class A CDL holder.

We have created a series of practice tests that add flexibility to your learning process. This particular Colorado CDL Combination Vehicles Practice Test consists of 25 questions similar to those you will encounter in the official exam. Each question has multiple answer choices, but only one is correct. You get unlimited attempts and nonstop access to this intuitive tool, which can significantly boost your learning potential when used regularly. Many of our practice tests are untimed, including this one. Please finish each training session at your own pace and avoid rushing.

Your personal Challenge Bank™ stores all the questions you get wrong. Visit this section to identify areas that need improvement and learn from your mistakes. Practice with the questions you previously got wrong and remove them from your Challenge Bank by answering them correctly.

Mastering general commercial driving theory can take several weeks. Our Free Colorado CDL Permit Practice Test makes it easier for you to study this subject, helping you become an expert in this field before taking your first official exam.

Real exam-style pitfalls you’ll practice:
Common Traps
Distractors
Trick Wording
Double Negatives
CO CDL Combination Vehicles Practice Test 4 2025
Commercial Driver's License
Based on official CO exam questions
Steven Litvintchouk, M.S., Chief Educational Researcher at Driving-Tests.org

Authored and fact-checked by Steven Litvintchouk, M.S.

Chief Educational Researcher, Driving‑Tests.org (ACES member)
Last verified for accuracy on
Methodology & Editorial Policy

10 min to complete
Available in EN and ES

What to expect on the actual CO permit test

20

questions

16

correct answers to pass

80%

passing score

More CO CDL test resources

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