What is the Branch Pipe Cut-Out Cock used for?

What is the Branch Pipe Cut-Out Cock used for?

• A. A device used for cutting in and cutting out the control valve on a locomotive or car.
• B. A valve that drains reservoir pressure to zero.
• C. A switch for horn control.
• D. A filter for brake line.

Answer: (A)

The branch pipe cut-out cock is a valve that lets you isolate or connect the control valve in the braking system by cutting in or cutting out the branch pipe. This is handy when you need to service a locomotive or car or remove a unit from the train without disturbing the rest of the brake system. It specifically applies to the path feeding the control valve from the branch pipe, not to draining reservoir pressure, handling horn controls, or filtering the brake line.

The branch pipe cut-out cock is a valve that lets you isolate or connect the control valve in the braking system by cutting in or cutting out the branch pipe. This is handy when you need to service a locomotive or car or remove a unit from the train without disturbing the rest of the brake system. It specifically applies to the path feeding the control valve from the branch pipe, not to draining reservoir pressure, handling horn controls, or filtering the brake line.