What is the function of a multiple-circuit safety valve in an air brake system?

The multiple-circuit safety valve plays a critical role in the air brake system of vehicles, particularly in heavy transport and commercial vehicles. Its primary functions involve sealing off leaking circuits to prevent total brake system failure while ensuring that the remaining circuits still receive the necessary supply of compressed air to function properly.

By selecting both statements regarding the valve's function, you correctly identified its purpose to seal off a leaking circuit and to ensure that intact circuits maintain air supply. This is important for maintaining safety and control in the vehicle, as failing to address a leaking circuit could lead to a loss of braking force, creating hazardous driving conditions.

In accordance with German traffic regulations, ensuring the integrity and functionality of the braking system is paramount. This highlights the significance of the multiple-circuit safety valve in preventing accidents and ensuring that all brake circuits operate effectively, even if one is compromised. Understanding this helps in the maintenance and operation of vehicles within legal standards, thereby promoting road safety.