CDL · Doubles and triples
Which description best fits a converter dolly?
Correct answer: A coupling unit for hooking a semitrailer onto the rear of a tractor-trailer.
Answer options
- AAn electronic unit that sends power from a semitrailer back to the tractor.
- BAn adapter that converts electrical current so trailers from other countries can be towed.
- CA coupling unit for hooking a semitrailer onto the rear of a tractor-trailer. Correct
Why
A converter dolly is a unit with one or two axles and a fifth wheel that lets a semitrailer be coupled to the back of a tractor-trailer, making a double or triple combination. The name can fool you, since it has no connection to converting electrical power.
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
- You are unhooking the second semitrailer of a double. To what point do you crank down its landing gear?
- When hooking a converter dolly to the second or third trailer, how can you tell that the trailer is at the right height?
- You are about to hook up a second trailer that has no spring brakes. How can you hold it in place first?
- You are about to uncouple the rear trailer. What do you do first?
- What must be done with the rear shut-off valves before air can reach the second trailer's air tanks?
- Which statement about a converter dolly is true?
- What is unique about the way triple trailers are coupled?
- Which of these steps do you carry out first when uncoupling standard doubles?
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