What is the primary purpose of lockout/tagout procedures during maintenance?

What is the primary purpose of lockout/tagout procedures during maintenance?

• A. To improve productivity.
• B. To isolate energy sources and prevent unexpected machine startup.
• C. To test machinery under load.
• D. To document maintenance procedures.

Answer: (B)

The main idea is safety: lockout/tagout procedures are used to keep a machine from starting unexpectedly and to prevent the release of stored energy while someone is working on it. By de-energizing the equipment, isolating all energy sources (electrical, hydraulic, pneumatic, mechanical, gravitational, etc.), and applying a lock or tag, the controls cannot be re-energized until the maintenance is finished and the devices are removed in a controlled way. The lock physically prevents someone from re-energizing the machine, while the tag provides a warning and identifies who is responsible. Verifying zero energy before starting work and rechecking before removing locks ensures a safe, predictable environment for maintenance. This focus on preventing unexpected startup and energy release is why it’s the best answer, unlike options aimed at productivity, testing under load, or simply documenting procedures.

The main idea is safety: lockout/tagout procedures are used to keep a machine from starting unexpectedly and to prevent the release of stored energy while someone is working on it. By de-energizing the equipment, isolating all energy sources (electrical, hydraulic, pneumatic, mechanical, gravitational, etc.), and applying a lock or tag, the controls cannot be re-energized until the maintenance is finished and the devices are removed in a controlled way. The lock physically prevents someone from re-energizing the machine, while the tag provides a warning and identifies who is responsible. Verifying zero energy before starting work and rechecking before removing locks ensures a safe, predictable environment for maintenance. This focus on preventing unexpected startup and energy release is why it’s the best answer, unlike options aimed at productivity, testing under load, or simply documenting procedures.