New Jersey Air Brakes Practice Test 2025 – The All-in-One Guide to Master Your Exam Success!

The presence of moisture in the air brake system is a strong indicator of a failure in the air dryer. Air dryers are designed to remove moisture and contaminants from the compressed air before it enters the braking system. If moisture is present, it suggests that the air dryer is not functioning properly and is failing to perform its critical role in maintaining the integrity of the air brake system. Excess moisture can lead to issues such as freezing in cold weather, which can impede brake function and create potential safety hazards.

In contrast, optimal brake performance and increased fuel efficiency are signs of a well-functioning system, while lower air pressure readings might reflect other issues unrelated to the air dryer's capacity to remove moisture. These various factors help to understand the state of the air brake system, reinforcing the vital role of the air dryer in ensuring the system operates effectively and safely.