What is the first step in conducting an Application and Release Test?

The first step in conducting an Application and Release Test is to charge the brake system to within 15 psi of the regulating valve setting. This initial step ensures that the brake system has adequate pressure to operate effectively during the test. Charging the brake system allows for proper functioning of the air brakes and sets the stage for making a controlled test of both the application and release of the brakes.

When the brake system is charged correctly, it creates a foundation for evaluating the response of the train’s braking system, including how quickly the brakes apply and release once commanded. This is essential for determining whether the braking system is operating within required parameters, which is critical for train safety and performance.

By starting with the correct pressure charge, the conductor can proceed to make the necessary reductions and observe the gauges to confirm that the braking system is responding properly during the test phases.