CDL Doubles and Triples Test
Hooking up and driving with two or three trailers.
Start practicing · Topic Study · Sample questions
What's on the Test
- Procedures for assembly and hookup of the units (4 questions): Coupling and Uncoupling, Inspecting Doubles and Triples
- Proper placement of heaviest trailer (4 questions): Coupling and Uncoupling
- Handling and stability characteristics (4 questions): Pulling Double/Triple Trailers
- Potential problems in traffic operations (4 questions): Pulling Double/Triple Trailers
- Operating practices and procedures not otherwise specified (4 questions): Pulling Double/Triple Trailers, Inspecting Doubles and Triples, Doubles/Triples Air Brake Check
How the Exam Works
- Who takes it
- Class A drivers adding the T endorsement.
- Format
- 20 questions, each with three options.
- To pass
- 16 right (80%), as on every CDL knowledge test (49 CFR 383.135).
Frequently Asked Questions
How many questions are on the CDL Doubles and Triples test?
20, and you need 16 right to pass. A few states differ; your state's CDL manual says.
Is there a skills test for doubles and triples?
No. The T endorsement needs only the knowledge test (49 CFR 383.93(c)(1)).
Are these the real test questions?
No. They're our own, written from the federal rules and the CDL manual's facts, in the real test's format: three options each and the same number of questions. We're not affiliated with any state, FMCSA or AAMVA.
After the Test
The doubles and triples endorsement needs only this knowledge test, and a Class A CDL. CDL Classes and Endorsements