Which is not a minimum requirement for installed physical safeguards?

Which is not a minimum requirement for installed physical safeguards?

• A. Guard surfaces are smooth
• B. Interlocks function properly
• C. Allow automatic start up after power failures
• D. Close-fitting guards

Answer: (C)

The main idea is what installed physical safeguards must do to keep workers from hazards posed by moving parts: they should physically block access, stay in place, and stop the machine when protection is breached. Guard surfaces should be smooth so clothing or skin can’t snag or cut on rough edges, and the guards should fit closely to prevent gaps that could allow contact with the danger area. Interlocks must work properly because opening or removing a guard should immediately stop the machine, preventing exposure. Allowing automatic restart after a power failure isn’t a safety requirement for guards; in fact, machines should not automatically restart—operator reset or manual restart is typically needed to ensure the operator is ready and aware. So the option that isn’t a minimum requirement is allowing automatic start-up after power failures.

The main idea is what installed physical safeguards must do to keep workers from hazards posed by moving parts: they should physically block access, stay in place, and stop the machine when protection is breached. Guard surfaces should be smooth so clothing or skin can’t snag or cut on rough edges, and the guards should fit closely to prevent gaps that could allow contact with the danger area. Interlocks must work properly because opening or removing a guard should immediately stop the machine, preventing exposure. Allowing automatic restart after a power failure isn’t a safety requirement for guards; in fact, machines should not automatically restart—operator reset or manual restart is typically needed to ensure the operator is ready and aware. So the option that isn’t a minimum requirement is allowing automatic start-up after power failures.