What is the purpose of machine guarding and interlocks?

• A. To decorate the machine.
• B. To protect against noise.
• C. To ensure machines run faster.
• D. To prevent contact with moving parts and to stop machinery when guards are opened or not secured.

Answer: (D)

Protecting people from moving parts is the main purpose of machine guarding and interlocks. Guards create a physical barrier to prevent contact with belts, gears, blades, and other moving components, while interlocks ensure the machine automatically stops whenever a guard is opened or not securely in place. This combination dramatically lowers the risk of serious injuries such as crushing, cutting, or amputation by making it impossible to run the machine with an unguarded or improperly secured guard. Guards should reliably interrupt all energy sources so the machine cannot operate when the guard isn’t properly in place. The other options don’t address safety: decorating the machine doesn’t protect anyone, reducing noise isn’t the primary function, and making machines run faster would undermine safety.