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Free Idaho CDL HazMat Endorsement Practice Test 2025

Avg. pass rate on our ID tests: 69%.
Average pass rate for this test: 61%.
Hard
7 min
76% fail this test first try • Better here than at DMV
Score distribution:
90-100=>15%
80-89=>18%
70-79=>27%
60-69=>20%
<60%=>20%
Avg. first-try score: 76%

Permitting you to transport materials the U.S. government has judged hazardous, the Hazardous Materials (Hazmat) endorsement added to your Commercial Driver’s License (CDL) will open a host of new career opportunities and higher income potential. Ensuring your safety as well as protecting the people and environment along your routes is the primary objective of the endorsement process. We’ll also discuss some of the financial benefits in more detail in just a moment!

The minimum age for the Hazmat endorsement is 21 for interstate travel. Idaho, however, is one of the states that allow drivers aged 18–20 the endorsement, but they cannot transport cargo across state lines until they turn 21. All drivers must go through a couple of steps before this endorsement can be added to their CDL. This process includes a background check, fingerprinting, and the DMV knowledge test. The test covers topics like federal regulations, handling and packaging of hazardous materials, allowed quantities, and approved transport configurations. Idaho’s knowledge test is made up of 30 questions and must be passed with a score of at least 80% (24 out of 30 answers must be correct) (Idaho CDL Handbook 2025).

Free Idaho CDL HazMat Endorsement Practice Test 2025
ID commercial driver's license
Original questions by our team Based on 2025 ID CDL Handbook
Steven Litvintchouk, M.S., Chief Educational Researcher at Driving-Tests.org

Reviewed for legal and handbook accuracy

Steven Litvintchouk

M.S., Chief Educational Researcher (ACES member)

Last verified for accuracy on

Andrei Zakhareuski, Co-founder & CEO, Driving-Tests.org

Test design and learning experience oversight

Andrei Zakhareuski

Co-founder & CEO, Driving-Tests.org

Questions are created and maintained by the Driving-Tests.org content team following our multi-layer editorial process and updated whenever the Idaho DMV changes its handbook or website information. Official sources we check: 

Real Idaho drivers who passed first try

Verified student reviews • Shared with permission

Flying colors yay!
I got the hazmat and then decided to upgrade and take the tanker preparation testing too. Within a few days I felt prepared so I went in to DMV and took both tests and passed with 100% on each. Did not miss a single question.
JGB
Amazing program.
Practice tests are simply the best out there for CLP written test. Customer service is also amazing. Fast responses on the live chat during normal business hours. Amazing wealth of knowledge that's easy to understand. I passed my written test for CDL class A with air brakes, double/ triple, tanker, and Hazmat on the first attempt all on the same day after completing the program.
SP
I have passed my knowledge test.
I have passed my air brakes, combinations, and Doubles and triples, got my eldt for hazmat and cdl A, only thing left is the tanker endorsement and im good to go, 5 stars for them they deserve it👌🏼👌🏼🙏🏼🙏🏼
AL
Hazmat course.
Already had my CDL and signed up for the Hazmat course. If you know your stuff, you can complete the course in a few short hours. They sent my certification straight over to the FMCSA. I had my Hazmat endorsement the next day.
MTD

About the Idaho CDL

Let’s get back to the potential income increase available with this endorsement. According to the 2025 Idaho CDL manual, the Hazmat endorsement opens up an entire arena of cargo transport options that are not available to non-holders! In Idaho, there are multiple industries with cargo transport that require the Hazmat endorsement, such as agriculture (pesticides and fertilizers), mining (explosives and chemicals), manufacturing (solvents, paints, and cleaning agents), and energy production (petroleum and natural gas). This sounds very lucrative and a little overwhelming, right? It doesn’t have to be. Let’s simplify things a bit.

You’ll quickly find that searching online for study material will return an overwhelming amount of information. Our Idaho DMV Hazmat Endorsement practice tests are strategically designed to zero in on the necessary information for the test and avoid a lot of the extraneous information not needed to pass. Our tests replicate both the structure and content of the official DMV test, both reinforcing the material and getting you very comfortable with the test process. When you feel prepared, you’ll take your necessary documents to the DMV, pay any related fees, and take the official knowledge test.

More ID CDL test resources

  1. HazMat Test 1 (you are here)
  2. HazMat Test 2
  3. HazMat Test 3

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