In a standing brake test, to what pressure should Straight Air be reduced?

In a standing brake test, Straight Air pressure should be reduced to 30 psi to effectively test the braking system. This pressure is essential for simulating realistic operating conditions without over-stressing the braking components. At 30 psi, engineers can accurately assess the brake's responsiveness and efficiency while ensuring that the test remains within safe operational parameters.

This standard helps to prevent potential damage to the braking system or the train itself, allowing for a thorough evaluation of the brakes' performance. A lower pressure might not provide enough force to test the brakes adequately, while a higher pressure could lead to excessive wear or unintended braking performance results. Therefore, 30 psi strikes the right balance, providing a safe environment for effective training and testing of brake functionalities.