What is a yard line in train operations?

What is a yard line in train operations?

• A. An air supply line used in yards and other areas to charge car air brake systems for testing purposes. A yard line may also be used to supply air to a train or block of cars that have already been tested.
• B. A type of signaling device used at stations.
• C. A storage container for air hoses during maintenance.
• D. A fixed pipe on freight cars for cooling air.

Answer: (A)

In yard operations, a yard line is the air supply line located in yards or maintenance areas used to charge the brake systems on cars or trains for testing. Connecting to this line brings the car’s or block’s air brake system up to the proper testing pressure so brakes can be checked to ensure they release and apply correctly before moving. This line may also continue to supply air to a train or block of cars that have already been tested for ongoing testing or recharging during inspection. It’s not a signaling device, a storage container, or a fixed cooling pipe on freight cars, which serve other purposes.

In yard operations, a yard line is the air supply line located in yards or maintenance areas used to charge the brake systems on cars or trains for testing. Connecting to this line brings the car’s or block’s air brake system up to the proper testing pressure so brakes can be checked to ensure they release and apply correctly before moving. This line may also continue to supply air to a train or block of cars that have already been tested for ongoing testing or recharging during inspection. It’s not a signaling device, a storage container, or a fixed cooling pipe on freight cars, which serve other purposes.