We've added this question to your Challenge Bank™
All your missed questions are saved automatically for extra practice.
– / –
Already in your
Challenge Bank!™
We save your wrong answers to help you master them after this test or later. Keep going — each mistake brings you closer to perfection!
Premium Members Only
Adding difficult questions to Challenge Bank™ is an exclusive Premium feature. Unlock access to 650+ exam-like questions, a Pass Guarantee, personalized study plans, and more.
Explore Premium benefits
Ask DMV Genie AI
new
Close
IA CDL Double/Triple Trailers Practice Test 2025
- Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
- Based on 2025 IA commercial driver's license manual
- Triple-checked for accuracy
- Updated for March 2025
Taking your IA CDL Double/Triple Trailers endorsement can be stressful. Take some of the stress out of the equation by taking the Iowa CDL D/T Trailers practice test. This 20-question practice test closely resembles the authorized test so you can build up your confidence prior to the day of the test. Then, when you finally walk into the DMV, you’ll be ready to take your endorsement test with ease, knowing that you’re ready to get all of the answers right.
Getting to Know the Practice Test
If you’ve never taken a CDL practice test before, you might not be sure what’s coming. First, it’s important to know that the questions from the test are taken directly from the 2025 Iowa state CDL manual. That means that each question is specific to your state, just like the ones you’ll find on the official exam. When you take the actual test at the DMV, you’ll realize that the questions are very similar to the ones that were here on the practice test. They might be worded slightly differently, but they contain the same information. That is why this practice test is such a helpful tool.
Make Sure You’re Ready
When test day comes, some people head straight to the DMV. It’s a good idea to take your practice test once more to make sure you’re fully prepared. Those questions will refresh your memory. As you go through the questions, you might realize that you aren’t quite as sharp on a particular subject. Then, you need to take out your CDL manual and immerse yourself in that subject before you head out to take your test. Then, when you finally walk through those doors, you will be ready to handle anything that comes your way. No one will stop you from walking back out the doors with your CDL Double/Triple Trailers endorsement!
If you want to be successful the first time you take your IA CDL Double/Triple Trailers exam, a practice test is the key. With the aid of a practice test, you won’t have any trouble making it through the questions in the official test. Good luck with your endorsement!
8 min to complete
Available in EN and ES
Ensuring the accuracy and quality of our program is paramount. Learn more about our rigorous standards in our Commitment to Accuracy article. 
Verified by Steven Litvintchouk,
Chief Educational Researcher, Member of ACES.
Chief Educational Researcher, Member of ACES.
This test is a Premium member exclusive. You'll get:
What to expect on the actual IA DOT exam
20
questions
16
correct answers to pass
80%
passing score
More IA DOT Written Exam Resources
Are you in another state?
- Alabama: Test 1 / Test 2
- Alaska: Test 1 / Test 2
- Arizona: Test 1 / Test 2
- Arkansas: Test 1 / Test 2
- California: Test 1 / Test 2
- Colorado: Test 1 / Test 2
- Connecticut: Test 1 / Test 2
- Delaware: Test 1 / Test 2
- District of Columbia: Test 1 / Test 2
- Florida: Test 1 / Test 2
- Georgia: Test 1 / Test 2
- Hawaii: Test 1 / Test 2
- Idaho: Test 1 / Test 2
- Illinois: Test 1 / Test 2
- Indiana: Test 1 / Test 2
- Iowa: Test 1 / Test 2
- Kansas: Test 1 / Test 2
- Kentucky: Test 1 / Test 2
- Louisiana: Test 1 / Test 2
- Maine: Test 1 / Test 2
- Maryland: Test 1 / Test 2
- Massachusetts: Test 1 / Test 2
- Michigan: Test 1 / Test 2
- Minnesota: Test 1 / Test 2
- Mississippi: Test 1 / Test 2
- Missouri: Test 1 / Test 2
- Montana: Test 1 / Test 2
- Nebraska: Test 1 / Test 2
- Nevada: Test 1 / Test 2
- New Hampshire: Test 1 / Test 2
- New Jersey: Test 1 / Test 2
- New Mexico: Test 1 / Test 2
- New York: Test 1 / Test 2
- North Carolina: Test 1 / Test 2
- North Dakota: Test 1 / Test 2
- Ohio: Test 1 / Test 2
- Oklahoma: Test 1 / Test 2
- Oregon: Test 1 / Test 2
- Pennsylvania: Test 1 / Test 2
- Rhode Island: Test 1 / Test 2
- South Carolina: Test 1 / Test 2
- South Dakota: Test 1 / Test 2
- Tennessee: Test 1 / Test 2
- Texas: Test 1 / Test 2
- Utah: Test 1 / Test 2
- Vermont: Test 1 / Test 2
- Virginia: Test 1 / Test 2
- Washington: Test 1 / Test 2
- West Virginia: Test 1 / Test 2
- Wisconsin: Test 1 / Test 2
- Wyoming: Test 1 / Test 2
