Whenever possible, how should air hoses be separated?

Whenever possible, how should air hoses be separated?

• A. After closing 'Appropriate Anglecock' allow train movement to separate hoses
• B. Before closing anglecock
• C. While trains are moving
• D. By tying hoses together

Answer: (A)

Air hoses carry brake pipe pressure, so when you uncouple you must isolate the braking system first. Closing the angle cocks on the hoses shuts off the flow of air, preventing a sudden release or explosion of pressure into the disconnected hose. Once the hoses are isolated, you can begin to move the locomotives apart so the hoses separate cleanly without whipping or kinking. This sequence protects crew and equipment from unexpected brake application or hose damage. Moving while not isolating, tying hoses together, or trying to separate while the brakes are still pressurized is unsafe and can cause damage or injury.

Air hoses carry brake pipe pressure, so when you uncouple you must isolate the braking system first. Closing the angle cocks on the hoses shuts off the flow of air, preventing a sudden release or explosion of pressure into the disconnected hose. Once the hoses are isolated, you can begin to move the locomotives apart so the hoses separate cleanly without whipping or kinking. This sequence protects crew and equipment from unexpected brake application or hose damage. Moving while not isolating, tying hoses together, or trying to separate while the brakes are still pressurized is unsafe and can cause damage or injury.