CDL · Doubles and triples
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?
Correct answer: Raised just a little.
Answer options
- ARaised just a little. Correct
- BLowered as far as it will go.
- CRaised as far as it will go.
Why
Set the trailer brakes and crank the landing gear up only until its pads leave the ground. Keeping it slightly raised protects the gear from damage if the trailer moves while you test the hookup.
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
- Your set of twins includes a loaded rear trailer that you are about to unhook. How low should its landing gear go?
- What are the basic components of 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?
- You release the pintle hook before the converter dolly has been pulled out from under the second trailer. What is the likely result?
- 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?
- What is unique about the way triple trailers are coupled?
- How can you release the brakes on a converter dolly?
- What must be done with the rear shut-off valves before air can reach the second trailer's air tanks?
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