CDL · Doubles and triples
What are the basic components of a converter dolly?
Correct answer: One or two axles and a fifth wheel.
Answer options
- ATwo or three axles and a fifth wheel.
- BTwo or three axles and a kingpin.
- COne or two axles and a fifth wheel. Correct
Why
A converter dolly is a short coupling unit with one or two axles topped by a fifth wheel, much like the back of a tractor, so a semitrailer's kingpin can lock onto it. Its drawbar eye hooks to the pintle hook of the trailer ahead.
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 have backed the converter dolly under the rear trailer of a double and are about to check the coupling. How should that trailer's landing gear be positioned?
- You release the pintle hook before the converter dolly has been pulled out from under the second trailer. What is the likely result?
- Your set of twins includes a loaded rear trailer that you are about to unhook. How low should its landing gear go?
- What is unique about the way triple trailers are coupled?
- The second trailer you need to couple has no spring brakes, and you have no wheel chocks. What should you do before you couple it?
- What must be done with the rear shut-off valves before air can reach the second trailer's air tanks?
- Once the converter dolly is hooked to the rear trailer, you check the connection by eye. How much of a gap should there be where the upper fifth wheel meets the lower one?
- You are about to hook up a second trailer that has no spring brakes. How can you hold it in place first?
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