Texas Doubles and Triples Test

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.

What This Test Covers

• 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
• Speed and stopping distances – longer rigs need more space, especially on I-35
• Wind effects – strong crosswinds on TX-114 and the Panhandle can flip you
• Inspecting converter dollies – common failure point for Texas doubles operators

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 DMV 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.

Frequently Asked Questions

Related Resources

Other Texas CDL Practice Tests

Test Details

• State: Texas
• Test: Doubles and Triples Test
• Questions: 93
• Passing Score: 80%
• Time Limit: 25 minutes
• Cost: Free

Need ELDT Training?

If you're getting your first CDL, you need ELDT theory training before your skills test.