1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
All tests
/
 
 
 
 
 
Advertisement

CO CDL Tanker Vehicles Endorsement Practice Test 2025

  • Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
  • Based on 2025 CO commercial driver's license manual
  • Triple-checked for accuracy
  • Updated for July 2025

It’s a great time to add a tanker endorsement to your Colorado Commercial Driver’s License (CDL). By adding a tanker endorsement, you will instantly increase your job opportunities to carry more types of cargo. You will gain access to jobs offering higher earnings potential and attractive incentives for qualified drivers. There’s no better way to experience a Rocky Mountain High than taking in the natural scenery of the Centennial State, and your CDL tanker endorsement can set you on your way. It’s only a matter of obtaining the appropriate training to enhance your driving skills.

With our Colorado DMV CDL tanker endorsement practice test, you’ll receive the training necessary to exhibit your knowledge and ability to operate these vehicles. Although the tanker endorsement will help you expand your driving opportunities, you should also consider the benefits of including a Hazardous Materials (HazMat) endorsement on your CDL (https://driving-tests.org/colorado/co-cdl-hazmat-practice-test/). The HazMat endorsement grants you the certification to transport cargo that requires higher safety standards, such as petroleum products and explosives. Both of these endorsements require you to correctly answer a minimum of 80% of the 20 questions on the official knowledge test. For the HazMat endorsement, you must also successfully complete a background check by the Transportation Security Administration (TSA).

Our free Colorado DMV CDL tanker endorsement practice test uses an innovative approach to learning that you will find preferable to traditional study methods. Unlike traditional study methods, such as study guides, the practice test provides you with critical information to address your specific misconceptions. The practice test is based on the most recent Colorado DMV CDL manual (Colorado CDL Handbook 2025) and is up to date as of July 2025. It is designed to allow you to learn at your own pace without a time limit and increase your chances of passing the official knowledge test on your first attempt. The practice test contains 20 multiple-choice questions, similar to those on the official knowledge test, to evaluate your current skills level. Unlike study guides, the practice test will specifically identify your knowledge gaps based on your incorrect answers and provide the information to correct them. In comparison, a study guide trains you to memorize the answers to the questions without explaining the logic supporting them. The practice test equips you with the skills you need to pass the official knowledge test and enjoy a successful tanker driving career.

Mork from Ork traveled to Boulder from the future to study human behavior. You can move forward in the present by learning exceptional driving skills to benefit you for many years to come by using the practice tests at https://driving-tests.org/colorado/.

CO commercial driver's license
  • Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
  • Triple-checked for accuracy
This test is a Premium member exclusive. You'll get

All 650 exam-like questions specific to Colorado

Interactive learning with AI personal tutor

Unique 360° Virtual Road Simulations

Get your money back if you don’t pass

About this test

10 min to complete
Available in EN and ES
Verified by Steven Litvintchouk, M.S., Chief Educational Researcher, Member of ACES. See our detailed commitment to accuracy and quality in our practice tests.
Ensuring the accuracy and quality of our program is paramount. Learn more about our rigorous standards in our Commitment to Accuracy article.

What to expect on the actual CO DMV exam

20

questions

16

correct answers to pass

80%

passing score

Are you in another state?

Your go-to, trusted source

Experience the Driving-Tests difference
Since our foundation in 2010, Driving-Tests.org has led the way in online driver's education, with over a decade of experience. Our dedicated experts, bringing together more than 50 years of collective expertise, have established us as the largest non-governmental organization in the U.S. solely focused on driver education. We go beyond the official manuals, offering unique interactive experiences and support like audio guides and an AI Assistant, to cater to different learning styles and needs.
Helping hundreds of thousands to ace their tests, our resources have earned a 4.7-star rating from over 14,500 reviews. Our goal is to make your path to becoming a confident driver as straightforward and effective as possible.
 (4 mistakes allowed to pass)
Restart
Ask AI Coach
Hi there! I'm Officer Frank