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Practice quizzes / Iowa CDL Combination Vehicles Test Practice Questions - Iowa Commercial Driver License Combination Vehicles Test Exam / Question 106333
Practice question

What can happen if a trailer is too high when coupling?

  1. It always couples safer
  2. It lowers itself automatically
  3. It prevents air leaks
  4. It may not couple correctly

Answer: D — It may not couple correctly

The correct answer is shown above. Try the full quiz for additional practice.

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