Name two common types of machine guarding used in the workplace.

• A. Warning labels and color-coded tapes.
• B. Physical barriers (guards) and interlocked safety devices.
• C. Safety posters and mindfulness reminders.
• D. Lockout/Tagout procedures and PPE only.

Answer: (B)

Machine guarding aims to stop workers from coming into contact with dangerous moving parts. Two common guarding methods are physical barriers (guards) and interlocked safety devices. Physical barriers create a solid boundary that you can’t reach through or around, like guards, fences, or enclosures. Interlocked safety devices are switches that detect when a guard is opened or removed and automatically stop the machine, preventing operation while access is possible. Together, they provide both a visible boundary and an automatic stop mechanism, reducing injury risk. The other options offer warnings, reminders, or personal protective measures rather than actual guarding of the hazard.