Which component is designed to prevent air from rapidly escaping from the reservoirs in the event of a significant leak in a line or chamber downstream?

Question: Which component is designed to prevent air from rapidly escaping from the reservoirs in the event of a significant leak in a line or chamber downstream?

Answer options:

• Pressure relief valve ✅ Dual check valve (or one-way check valves isolating circuits)
• Service brake chamber
• Air gauge

Correct answer: Dual check valve (or one-way check valves isolating circuits)

Explanation: Dual check valves or multiple one-way check valves are strategically placed to ensure that a major leak in one part of a split air system (e.g., front axle vs. rear axle service brake circuit) does not deplete the air from the other, independent circuit or shared supply reservoirs. This ensures that some braking capability remains.