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Practice quizzes / Massachusetts CDL Combination Practice Questions - Massachusetts CDL Combination Vehicles Test Exam / Question 122614
Practice question

Why should glad hand seals be inspected?

  1. They control turn-signal color
  2. They set trailer ride height
  3. Damaged seals can leak air and reduce brake reliability
  4. They lubricate the kingpin

Answer: C — Damaged seals can leak air and reduce brake reliability

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

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