Which safety procedure requires a device to be placed on a machine to prevent its start during maintenance?

Which safety procedure requires a device to be placed on a machine to prevent its start during maintenance?

• A. Lockout/Tagout
• B. Lockout
• C. Tagout
• D. Machine Shutdown Protocol

Answer: (A)

Isolating a machine from its energy sources to prevent it from starting while someone works on it is about creating a physical and visible safeguard against accidental energization. The standard approach combines a lock and a tag on the energy‑isolation device, which is known as lockout/tagout. The lock stops the machine from being powered, while the tag communicates that maintenance is in progress and records who placed the control and why. This dual protection is why lockout/tagout is the best answer: it provides a real physical barrier and a clear warning, and it supports proper procedures and verification before the equipment can be restarted. Using only a lock can prevent energizing the machine but lacks the warning for others, and using only a tag can warn but doesn’t physically prevent restarting. A Machine Shutdown Protocol isn’t the recognized method for ensuring energy isolation during maintenance.

Isolating a machine from its energy sources to prevent it from starting while someone works on it is about creating a physical and visible safeguard against accidental energization. The standard approach combines a lock and a tag on the energy‑isolation device, which is known as lockout/tagout. The lock stops the machine from being powered, while the tag communicates that maintenance is in progress and records who placed the control and why. This dual protection is why lockout/tagout is the best answer: it provides a real physical barrier and a clear warning, and it supports proper procedures and verification before the equipment can be restarted. Using only a lock can prevent energizing the machine but lacks the warning for others, and using only a tag can warn but doesn’t physically prevent restarting. A Machine Shutdown Protocol isn’t the recognized method for ensuring energy isolation during maintenance.