CDL Tank & HAZMAT (X) Endorsement Practice Test

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Practice Test Instructions:

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Each test contains questions based on information in the official driver's handbook.

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How to Use this Free CDL Written Practice Test

Each free practice test includes 15 multiple-choice questions based on the CDL manual. You can take the test as many times as you want.

Each time you take the test, you will receive a new set of 15 questions. The questions are generated randomly, so you can be sure that you are practicing a wide range of topics.

Before you know it, you will be ready to pass your written test and get your Commercial Learner’s Permit!

Get some more practice with the Tank/HAZMAT Exam Simulation.

What is the CDL Tank & HAZMAT Knowledge Test?

  • Number of Questions: 50 Total (20 N Knowledge Test & 30 H (HAZMAT) Knowledge Test)
  • Passing Score: 80% on each
  • Format: Multiple Choice & True/False

The Tank/HAZMAT Knowledge test is a combination of the Tanker and Hazmat Tests. These tests cover the Tank Vehicles section (Section 8) and the Hazardous Materials section (Section 9) of the CDL Manual.

Passing both of these knowledge tests require you to demonstrate your understanding of both transporting hazardous materials properly as well as handling a commercial tanker vehicle safely.

You’ll need to pass both the Tanker Knowledge Test and the Hazardous Materials Knowledge Test to satisfy the requirements for the Tank and HAZMAT endorsement.

The Tanker Test consists of 20 questions. The HAZMAT test consists of 30 questions. You’ll need to score an 80% on both of these tests to pass.

Who needs to take the Tanker HAZMAT written test?

The Tanker and HAZMAT written knowledge tests are required for CDL holders who want to transport hazardous materials in a tanker vehicle.

Passing both tests gets you the combination Tanker/HAZMAT (X) Endorsement added to your CDL.

Satisfying the full requirements of the X endorsement requires you to meet all criteria required for both the HAZMAT (H) Endorsement and the Tanker (N) Endorsement.