If your commercial vehicle is equipped with S-cam air brakes, and you notice a slow release of the brakes in cold weather, what is the most likely cause?

Question: If your commercial vehicle is equipped with S-cam air brakes, and you notice a slow release of the brakes in cold weather, what is the most likely cause?

Answer options: ✅ Moisture in the air lines freezing and restricting air flow.

• Overheating of the brake drums causing expansion.
• A fully charged air tank system.
• Excessive lubrication of the S-cam mechanism.

Correct answer: Moisture in the air lines freezing and restricting air flow.

Explanation: Moisture in the air lines can freeze in cold temperatures, restricting the flow of air to and from the brake chambers, leading to slow brake application and release.