How to Pass the CDL Doubles/Triples Written Test: A Complete Guide
Understand the specifics of towing multiple trailers with our Doubles/Triples test guide, emphasizing connection and stability techniques.
Written by Andrei Zakhareuski. With over 16 years of expertise, Andrei leads Driving-Tests.org, a top online resource for driver education. His leadership has established vital partnerships with over 2,600 libraries, educational bodies, and state agencies.
Understanding the Test
Exam Overview
Exam Overview
This test evaluates your knowledge and skills in handling and operating combination vehicles with more than one trailer, focusing on aspects unique to these types of vehicles.
Key Topics Covered
Key Topics Covered
Expect questions on coupling and uncoupling, vehicle inspection, air brake systems (if applicable), and driving safety for doubles and triples.
Start a free Doubles/Triples practice test:
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- West Virginia - WV - West Virginia Doubles/Triples Practice Test
- Wisconsin - WI - Wisconsin Doubles/Triples Practice Test
- Wyoming - WY - Wyoming Doubles/Triples Practice Test
How to Prepare
Study the CDL Manual
Focus on the doubles/triples section in your state’s CDL manual, which covers all the essentials you need to know.
Understand Coupling Procedures
Pay special attention to the safe and correct methods of coupling and uncoupling trailers.
Practice Tests
Leverage online practice tests to familiarize yourself with the format and types of questions you’ll encounter. You can find practice tests at Driving-Tests.org.
Sample Questions
Here are some sample questions to give you an idea of what to expect on the test.
Question 1: Inspecting Air Brake Systems
Question 1: Inspecting Air Brake Systems
What should you check for when inspecting the air brake system on a double/triple trailer?
- A) Air pressure levels
- B) Leaks in the system
- C) Both A and B
- Correct Answer: C) Both A and B
Question 2: Coupling Trailers
Question 2: Coupling Trailers
When coupling a second (or third) trailer, the correct order of operations is:
- A) Back up, connect air lines, lock pintle hook
- B) Connect air lines, lock pintle hook, back up
- C) Lock pintle hook, back up, connect air lines
- Correct Answer: B) Connect air lines, lock pintle hook, back up
Details
| Exam Feature | Details |
|---|---|
| Number of Questions | Typically 20-30 multiple-choice questions |
| Passing Score | 80% or higher |
| Time Limit | Varies by state, usually around 30-60 minutes |
| Key Topics | Coupling and uncoupling, air brakes, driving safety, vehicle inspection |
| Test Format | Computer-based in most states |
| Retake Policy | Varies by state; may include waiting periods and additional fees for retakes |
| Prerequisite | Valid CDL; specific additional requirements may apply |
Pro Tip: Hands-on experience with doubles/triples, if possible, can greatly enhance your understanding and preparation for the test.
The CDL Doubles/Triples Written Test is essential for those looking to operate vehicles with multiple trailers. Thorough preparation is key to ensuring safety and compliance on the road. For comprehensive study materials and practice tests, visit Driving-Tests.org.
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