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CDL Tanker and Hazmat Combo Endorsement X -2

Our Free CDL Practices Tests are designed to help you pass your CDL Tanker and Hazmat Combo Endorsement Test on the first try. This practice tests has 25 multiple choice questions each question is designed to help you learn the material in the CDL Handbook.
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Combo Tanker/HAZMAT Endorsement Practice Test

Earn two endorsements in one with help from our free online tanker/HAZMAT combo practice test! The combo endorsement, called the “X” endorsement, qualifies you to drive tank vehicles hauling liquid or gaseous cargo as well as carry hazardous materials… many of which are transported in tanker trucks. It’s the perfect solution to expand your career and take on increased responsibility as a commercial driver.

Our free online practice mimics the multiple-choice structure of the DMV tanker/HAZMAT combo endorsement exam, with 25 real CDL questions pulled directly from the most updated commercial driver laws and regulations found in your CDL manual. The practice test format benefits your memory recall, allowing you to study more efficiently and helping you quickly remember the information when you take your actual CDL endorsement exam. Our test includes detailed answers and explanations, along with a full round-up of any missed questions, so you know which topics to go back and study before you retake this test again to track your progress. Once you’ve passed your practice test with flying colors, you’ll be ready to ace your tanker/HAZMAT endorsement exam at the DMV!

Combo Tanker/HAZMAT Endorsement Practice Test FAQs:

Do I need the combo CDL tanker/HAZMAT endorsement?

You need a tanker/HAZMAT combo endorsement if your current or future career requires hauling hazardous materials in liquid or gaseous form, both of which would be carried in a tanker truck. You may also wish to earn the CDL X endorsement if you know you’ll be carrying liquids and HAZMAT separately, perhaps for different companies, and you want to handle both endorsements at the same time.

What questions are on the tanker/HAZMAT combo test?

The tanker/HAZMAT combo endorsement test is essentially two exams. You’ll be asked questions on the safe operation of tanker vehicles, such as how to drive top-heavy commercial vehicles, safe loading and off-loading of liquid and gaseous cargo, and others. You’ll also get

questions about types of hazardous materials, like poisons and batteries, as well as the procedures to safely haul them and how to handle emergencies like spills and crashes.

Does this practice test include real DMV questions from my CDL tanker/HAZMAT exam?

Yes, our practice tests are created using the FMCSA materials, along with the latest CDL handbooks, which your DMV uses to create their CDL endorsement exams.

CDL Sample Test Questions

A baffled liquid tank _______.
  • Has nothing to slow down the flow of liquid.
  • Has bulkheads in them with holes that let the liquid flow through.
  • Has very confusing controls
  • Does not work effectively.
A tank has a high center of gravity. This means _______.
  • Much of the load's weight is carried high up off the road.
  • Much of the load's weight is carried low off the road.
  • The vehicle is very heavy.
  • None of the listed answers.
An outage is defined as _______.
  • The loss of power to your hydraulics.
  • The liquid that needs to be drained to prevent your tank from exceeding the legal weight limits.
  • The process of liquid expansion as it becomes warm.
  • None of the listed answers.
Baffles in liquid cargo tanks do not usually prevent the liquid surge movement from _______.
  • Side to side.
  • Front to back.
  • Top to bottom.
  • All of the listed answers.
Because of outage, you should always _________.
  • Leave room for expanding liquids.
  • Bring an extra battery.
  • Remember to fill your tank.
  • To have a well-equipped safety kit.


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