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Want to drive big rigs or buses as a licensed commercial driver? You have a series of requirements to meet first. If you haven’t been a commercial driver before, you must obtain a commercial learner’s permit (CLP) before you can apply for a commercial driver’s license (CDL). Your CLP will allow you to practice operating commercial motor vehicles (CMVs) while supervised by a CDL holder. In addition to the documentation and medical requirements for a CLP, you must pass a set of knowledge tests for the class and type of vehicles you plan to drive. For all vehicles, however, you must pass the official General Knowledge test, which covers general commercial driving theory.
The official General Knowledge test covers pre-trip inspections and many other commercial driving topics. Your test will likely include some questions on defects or faults to look for in your vehicle’s components and systems. All questions on the General Knowledge test are based on the official Colorado CDL manual (Colorado CDL Handbook 2025). You should study the manual, but it may leave you feeling you could use more help to absorb the material and pass the General Knowledge test. That’s what we’re here for.
M.S., Chief Educational Researcher (ACES member)
Last verified for accuracy on
This Colorado CDL Pre-Trip Inspection Practice Test, one of several we offer, can help you learn how to correctly answer the General Knowledge test questions on pre-trip inspections. Like the official knowledge test, this practice test is multiple choice. Each question comes with several answer options. You must choose the best or most complete answer. You can also get help from our AI assistant on any question. At your request, it can supply hints and explanations and answer your specific questions on commercial driving. If you still miss a question, the AI assistant will immediately let you know and provide an explanation of the correct answer.
The information you’ll learn through our pre-trip practice tests won’t just help you pass the General Knowledge test. It will also prove helpful as you practice pre-trip inspections to pass the official skills test. And it may prove helpful in your commercial driving career when you must perform pre-trip inspections for real.
Some roads in Colorado can present challenging or even hazardous driving conditions. Some examples are the steep grades and hairpin curves on Wolf Creek Pass, the heavy snowfalls that can occur on Interstate 70 and U.S. Route 40, and the high winds and snow on I-76 in winter. A thorough pre-trip inspection will help ensure your vehicle is ready to tackle these conditions safely.
Be sure to try our other Colorado CDL Pre-Trip Inspection Practice Tests, too!
Driver’s Ed is - nobody wants to set foot inside the DMV. That’s why millions of learners trust us for simple, visual, effective prep.
We are an officially recognized FMCSA Entry-Level Driver Training provider and a proud partner to over 2,500 libraries. We work with safety organizations like GHSA and the National Safety Council to help create safer roads for everyone.
Our trademarked system automatically saves questions you miss, creating personalized tests that target your weak spots until you’ve mastered the material.
Get smarter as you study. Our new AI-powered feedback provides detailed, question-level insights to help you understand the why behind each answer.
Go beyond the boring black-and-white manual. Our interactive handbook lets you read, listen with an MP3 audio version, or even chat with it to find the information you need, faster.
We build our practice questions from the current 2025 CO Driver Handbook and refine them using patterns recent test‑takers report.
Driver handbook • Knowledge‑test/permit overview • Fees & ID requirements • Office/appointment info
We mirror recurring themes (e.g., right‑of‑way traps, sign look‑alikes) and use similar distractors and wording styles.
We don’t collect or publish actual test items and we’re not affiliated with DMV.
