New Jersey Air Brakes Practice Test 2025 - Free Air Brakes Practice Questions and Study Guide.

The maximum allowable brake fade during a vehicle descent must be minimal; if excessive, it requires auxiliary braking. Brake fade refers to the reduction in braking effectiveness that can occur when brakes overheat during prolonged use, such as during a descent. When brakes are continuously applied, the heat generated can cause the braking system to lose its effectiveness, leading to longer stopping distances and potentially dangerous situations.

Maintaining minimal brake fade is essential for safety, as it ensures that the braking system remains responsive and reliable. If the brakes begin to fade significantly, the driver must utilize auxiliary braking systems, such as engine braking or compression release brakes, to assist with slowing down the vehicle and maintaining control. This approach minimizes the risk of losing braking power entirely and helps prevent accidents.

The emphasis on auxiliary braking highlights the critical balance between relying on primary braking and understanding when additional measures are necessary, reinforcing the notion that drivers must be knowledgeable about their vehicle's braking capabilities and the techniques necessary for safe driving on descents.