What is the correct procedure when making a cut between two PA5 cars?

The procedure for making a cut between two PA5 cars is focused on ensuring the safety and readiness of the equipment involved. The correct approach involves keeping the train keyed up but not fully charged, which prevents any unintended movements during the process.

Applying parking brakes is a crucial step in this procedure because it secures the cars in place, ensuring that they do not roll away while the cut is being made. Additionally, using a vapor key is necessary as it allows for proper isolation and handling of the compressed air systems between the cars. By following this procedure, the engineer can perform the cut in a controlled manner, reducing the risk of accidents or damage to the train.

Other options may not encompass the comprehensive safety measures required for such operations. For instance, while applying the parking brakes and turning the coupler key switch off might seem appropriate, it doesn’t involve the step of ensuring the train is keyed up, which is critical for safety. Ensuring the train is powered and charging the brakes could create risks of movement, and simply inspecting the cars and notifying the yard foreman lacks the immediate actions necessary for the cut process.