CDL · Doubles and triples
In the official CDL manual, the section on doubles and triples generally explains coupling and uncoupling for which combinations?
Correct answer: Only the most widely used combinations.
Answer options
- AOnly the most widely used combinations. Correct
- BDoubles only; for triples you must use another source.
- CEvery type of combination in use.
Why
The manual describes the procedures for the more common combinations only, because there are too many types in use to cover them all. For any other setup, learn the correct method from the manufacturer or the owner.
About this question
Topic: Doubles and triples License: CDL
Part of these practice sets:
Where it applies: Asked in every state.
Practice the whole set
This question is part of Coupling Doubles and Converter Dollies (28 questions). Take the full set and check your score.
Practice Coupling Doubles and Converter DolliesMore questions from Coupling Doubles and Converter Dollies
- When you drop the rear trailer from a double combination, what should you do with the air shut-off valve at the back of the front trailer?
- Compared with an A-dolly, what is the main thing a B-dolly or C-dolly adds?
- When you uncouple twin trailers, which of these is the final step?
- What should you use to hold the second trailer still before you couple it to the rest of the doubles combination?
- You are getting ready to hook a second trailer to your rig. What can you use to hold that trailer in place?
- What is the reason for moving a dolly clear of the rear trailer before releasing it from the lead trailer?
- Which of these steps do you carry out first when uncoupling standard doubles?
- Which statement about converter dollies is accurate?
Practice on your phone.
Practice here in your browser, or use the app with the same questions and explanations. It's free on the App Store.