Texas Doubles and Triples Test
Hauling doubles on I-10 through the Permian Basin? You'll need this endorsement.
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Reviewed by Jack Mahana, CDL Instructor (13+ years)
Last verified: August 2026
All questions sourced from the official Texas CDL handbook and FMCSA regulations.
Practice for the Texas Doubles and Triples endorsement with 20 real questions. You'll get instant feedback on each answer.
Key Topics
- •Coupling and uncoupling procedures
- •Braking and stopping distances
- •Wind and stability control
About the Texas Doubles and Triples Test
Topics Covered
- ✓Coupling and uncoupling – crucial for Texas oil field pickups and drop-offs
- ✓Safe driving practices – handling long combinations on narrow rural roads
- ✓Air brake systems – essential for heavy loads on steep grades like the Hill Country
- + 3 more topics
📘 Study Tips & State Info
Focus on the Texas-specific rules in the CDL handbook. For example, Texas requires you to inspect the converter dolly every time you couple. Don't skip that step on the skills test.
Practice with our test until you score 85% or higher. Then schedule your appointment at a Texas DMV or third-party testing site. Bring your learner's permit and valid ID. The written test for doubles and triples costs $10 plus the regular CDL fee.
You can take the Texas Doubles and Triples knowledge test at any DMV office that offers CDL services. Many drivers prefer third-party testers because they offer more appointment slots. Check the Texas DMV website for a list of certified testing locations.
Appointments are required — no walk-ins. You'll pay a $10 endorsement fee when you pass. The test itself has 20 multiple-choice questions, and you need at least 16 correct to pass. Study the handbook and our practice test to get there.
About the Texas Doubles and Triples Test
Texas highways like I-35 and I-10 see plenty of double and triple trailer rigs. You'll often share the road with oil field traffic hauling long combinations across the state. That's why the Texas DMV requires a separate endorsement for doubles and triples.
Our practice test covers the same topics you'll face on the real exam. You'll answer questions about coupling procedures, braking distances, and how wind affects your rig. Texas weather can change fast — high winds near Amarillo or sudden gusts on the coastal plains. Knowing how to handle your trailers in those conditions keeps you safe.
Each question comes from the latest Texas CDL handbook. You get a detailed explanation after every answer. That way you learn the material, not just guess. We won't waste your time with fluff.
This test has 20 questions, and you need 80% to pass. That matches the real Texas CDL requirement. Ready? Dive in and see what you know.
Topics Covered
Study Tips
Focus on the Texas-specific rules in the CDL handbook. For example, Texas requires you to inspect the converter dolly every time you couple. Don't skip that step on the skills test.
Practice with our test until you score 85% or higher. Then schedule your appointment at a Texas DMV or third-party testing site. Bring your learner's permit and valid ID. The written test for doubles and triples costs $10 plus the regular CDL fee.
Texas Specific Information
You can take the Texas Doubles and Triples knowledge test at any DMV office that offers CDL services. Many drivers prefer third-party testers because they offer more appointment slots. Check the Texas DMV website for a list of certified testing locations.
Appointments are required — no walk-ins. You'll pay a $10 endorsement fee when you pass. The test itself has 20 multiple-choice questions, and you need at least 16 correct to pass. Study the handbook and our practice test to get there.