Which sequence lists the essential steps of lockout/tagout prior to maintenance?

Which sequence lists the essential steps of lockout/tagout prior to maintenance?

• A. Shut down equipment, apply lockout, start equipment to test, perform maintenance.
• B. Identify energy sources, shut down equipment, isolate energy, lockout/tagout with devices, test zero energy state, and verify with a checklist.
• C. Identify energy sources, apply safety gloves, lockout, run test.
• D. Isolate energy, clean surfaces, verify with a checklist, tagout.

Answer: (B)

The essential idea is preventing any unexpected machine energization during maintenance by following a proper lockout/tagout sequence and confirming zero energy before work begins. The best order starts with identifying all energy sources and how they could energize the equipment. Then shut the machine down using its normal controls. Next, isolate every energy source and apply lockout devices along with a tag to clearly indicate that maintenance is in progress. After isolation, verify there is no residual or stored energy by testing the system to confirm a zero energy state. Finally, use a checklist to verify that all steps are complete and nothing was missed before work starts. This sequence ensures that the machine cannot be restarted accidentally and that maintenance personnel work in a verified safe state. Other options skip or mishandle key pieces—like attempting a start to test energy, or including actions that aren’t part of lockout/tagout (such as gloves or cleaning)—which do not provide the required level of safety and verification.

The essential idea is preventing any unexpected machine energization during maintenance by following a proper lockout/tagout sequence and confirming zero energy before work begins. The best order starts with identifying all energy sources and how they could energize the equipment. Then shut the machine down using its normal controls. Next, isolate every energy source and apply lockout devices along with a tag to clearly indicate that maintenance is in progress. After isolation, verify there is no residual or stored energy by testing the system to confirm a zero energy state. Finally, use a checklist to verify that all steps are complete and nothing was missed before work starts.

This sequence ensures that the machine cannot be restarted accidentally and that maintenance personnel work in a verified safe state. Other options skip or mishandle key pieces—like attempting a start to test energy, or including actions that aren’t part of lockout/tagout (such as gloves or cleaning)—which do not provide the required level of safety and verification.