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15. If you must back a doubles combination, you should:
16. What should you inspect on the converter dolly fifth wheel during a pre-trip inspection?
17. What is the danger of improperly crossed or unsecured safety chains on a converter dolly?
18. When coupling a triple trailer combination, after coupling the tractor to the first trailer, what is the next step?
19. Why is it important to test the trailer brakes individually when inspecting a doubles or triples combination?
20. When driving doubles or triples in strong crosswinds, you should:
21. What should you check regarding the glad hands before starting a trip with doubles or triples?
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