CDL · Doubles and triples
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?
Correct answer: None of these is correct.
Answer options
- ABetween 1/2 and 3/4 inch.
- BIt varies with the weight of the load.
- CNone of these is correct. Correct
Why
When the dolly is coupled correctly, the two fifth wheel surfaces sit tight against each other with no space, and the locking jaws are closed on the kingpin. If you can see daylight between them, the coupling is faulty and must be redone before you move.
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
- How can you release the brakes on a converter dolly?
- 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?
- On a set of doubles, where should the rear trailer's landing gear be while you test the coupling?
- Your set of twins includes a loaded rear trailer that you are about to unhook. How low should its landing gear go?
- 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?
- What are the basic components of a converter dolly?
- You release the pintle hook before the converter dolly has been pulled out from under the second trailer. What is the likely result?
- What is unique about the way triple trailers are coupled?
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