CDL · Doubles and triples
Which statement about a converter dolly is true?
Correct answer: It has a separate air tank of its own.
Answer options
- AIt has no brakes of its own.
- BIt has an air compressor of its own.
- CIt has a separate air tank of its own. Correct
Why
Every wheel in a combination vehicle must have brakes, including the wheels on converter dollies. A dolly therefore carries its own air brakes and its own air tank, which is filled by the tractor's compressor through the air lines.
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 about to uncouple the rear trailer. What do you do first?
- Which of these steps do you carry out first when uncoupling standard doubles?
- 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 getting ready to hook a second trailer to your rig. What can you use to hold that trailer in place?
- Which description best fits a converter dolly?
- When you uncouple twin trailers, which of these is the final step?
- You are unhooking the second semitrailer of a double. To what point do you crank down its landing gear?
- 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?
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