Before adjusting hoses with hands, what must you ensure?

Before adjusting hoses with hands, what must you ensure?

• A. Both anglecocks are closed
• B. Both anglecocks are open
• C. One anglecock is closed
• D. No anglecocks are required

Answer: (A)

Before touching hoses, you must isolate the air lines to prevent any pressurized air from moving or releasing suddenly. Closing both anglecocks on the hoses achieves this, keeping the brake system protected while you work. If the anglecocks were open, air could flow or be released unexpectedly, which could cause the brakes to engage or release and could injure your hands or cause equipment damage. Having only one closed wouldn’t fully isolate the system, and saying no anglecocks are required isn’t correct because the air lines must be controlled for safe work.

Before touching hoses, you must isolate the air lines to prevent any pressurized air from moving or releasing suddenly. Closing both anglecocks on the hoses achieves this, keeping the brake system protected while you work.

If the anglecocks were open, air could flow or be released unexpectedly, which could cause the brakes to engage or release and could injure your hands or cause equipment damage. Having only one closed wouldn’t fully isolate the system, and saying no anglecocks are required isn’t correct because the air lines must be controlled for safe work.