What is one purpose of the brake test prior to departure?

One purpose of the brake test prior to departure is to verify the effectiveness of the braking system. This is crucial for ensuring safety during operation. A properly functioning brake system is essential for controlling the train under various conditions, especially when stopping or in emergencies. Conducting a brake test allows the crew to confirm that all components of the braking system are operating correctly, which directly impacts the safety of the train, crew, and passengers.

While other options might touch on aspects related to overall operation, such as focusing on comfort or aesthetic concerns, they do not align with the primary safety-related focus of the brake test. The effectiveness of the brakes is fundamental to prevent accidents and ensure the safe transport of passengers and cargo.