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15. To prevent rollovers in doubles and triples, a driver should:
16. When should you back a triple trailer combination?
17. What is the first step in coupling twin trailers?
18. After connecting the converter dolly to the second trailer and before coupling the dolly to the first trailer, what should you verify?
19. When uncoupling twin trailers, what should you do before disconnecting the converter dolly from the first trailer?
20. When coupling a triple trailer combination, in what order should the trailers be arranged from front to rear?
21. What component connects the converter dolly to the front trailer in a doubles or triples combination?
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