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8. During the coupling procedure, what height should the trailer be?
9. What is the first step when uncoupling a trailer?
10. What should you inspect the fifth wheel for during a pre-trip inspection?
11. What does off-tracking mean in combination vehicles?
12. What is the crack-the-whip effect?
13. What is rearward amplification?
14. How can you help prevent a jackknife?
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