CDL Doubles/Triples (T) Endorsement Practice Test

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Practice Test Instructions:

  • Choose the best answer and receive instant feedback.
  • Click next to go to the next question.
  • Check your results at the end.
  • Start a new version and keep studying!

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

Good luck -!


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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 CDL Doubles/Triples Exam Simulation.

What is the CDL Doubles/Triples Knowledge Test?

  • Number of Questions: 20
  • Passing Score: 80%
  • Format: Multiple Choice & True/False

The Doubles/Triples Knowledge Exam covers information from the Doubles and Triples section (Section 7) of the CDL Manual.

Information in this section includes:

  • Pulling double/triple trailers.
  • Coupling and uncoupling.
  • Inspecting double and triple trailers.
  • Double/Triples Air Brake Checks

The test consists of 20 multiple choice and true/false questions. You must get a score of 80% to pass (16 questions answered correctly.)

You can prepare for the doubles/triples written test by studying the appropriate section of the CDL Manual and taking some free practice tests.

Who needs to take the Doubles/Triples Test?

The Doubles/Triples Test is required for anyone who wants to add a T Endorsement to their CDL.

A Doubles/Triples (T) Endorsement allows the CDL holder to operate commercial vehicles pulling combinations of 2 or 3 trailers.

The T Endorsement opens up your CDL to many different Class A CDL vehicles.

Other written tests required for this endorsement include: