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Practice quizzes / Michigan CDL Combination Practice Questions - Michigan CDL Combination Vehicles Test Exam / Question 127122
Practice question

What should you do after connecting trailer air lines?

  1. Disconnect the electrical cord
  2. Lower landing gear for travel
  3. Charge the trailer air system and check leaks and brake operation
  4. Drive immediately at highway speed

Answer: C — Charge the trailer air system and check leaks and brake operation

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

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