The PASS position on the BVCOV is ONLY used under which condition?

The PASS position on the BVCOV is ONLY used under which condition?

• A. Used for passenger comfort
• B. Used during freight service
• C. Only used when there is an equalizing reservoir leak
• D. Always used

Answer: (C)

The PASS setting is a fault-condition mode in the BVCOV that is used only when there is a leak in the equalizing reservoir. The equalizing reservoir smooths and distributes air pressure to brake springs and cylinders across the train; when it leaks, normal operation can’t guarantee safe, even braking. The PASS position is designed to handle that specific fault, limiting how the system behaves to prevent further air loss and to maintain controllable braking until the problem is fixed. It isn’t used for passenger comfort, it isn’t a routine setting for freight service, and it isn’t a mode you leave engaged in normal operation.

The PASS setting is a fault-condition mode in the BVCOV that is used only when there is a leak in the equalizing reservoir. The equalizing reservoir smooths and distributes air pressure to brake springs and cylinders across the train; when it leaks, normal operation can’t guarantee safe, even braking. The PASS position is designed to handle that specific fault, limiting how the system behaves to prevent further air loss and to maintain controllable braking until the problem is fixed. It isn’t used for passenger comfort, it isn’t a routine setting for freight service, and it isn’t a mode you leave engaged in normal operation.