If the time needed to build air pressure exceeds what limit, should the vehicle be rejected?

A vehicle should be rejected if the time needed to build air pressure exceeds 30 seconds. This standard is in place to ensure that the air brake system is functioning properly. In a well-maintained system, the air pressure should build up to the required pressure level within this time frame to guarantee that the brakes respond appropriately in critical situations. A prolonged build-up time may indicate issues such as air leaks, malfunctioning components, or inadequate air supply, which compromise the reliability and safety of the vehicle's braking system. Ensuring that the air pressure builds within the established time limit is crucial for the overall safety and operational integrity of vehicles equipped with air brakes.