Which item is NOT listed as one of the three means of safeguarding machinery?

Which item is NOT listed as one of the three means of safeguarding machinery?

• A. Devices
• B. Guards
• C. Location/Distance
• D. Interlocks

Answer: (D)

The three ways to safeguard machinery are physical barriers that block access, automatic mechanisms that stop or control the machine to keep it safe, and arranging access so exposure is minimized (distance or location). An interlock is a safety feature that works with guards to ensure the guard is in place before the machine can run or to stop the machine if the guard is opened. Because it’s a mechanism used to support safeguarding rather than a separate category, interlocks aren’t listed as one of the three independent means. That’s why the item describing interlocks isn’t part of the three main means.

The three ways to safeguard machinery are physical barriers that block access, automatic mechanisms that stop or control the machine to keep it safe, and arranging access so exposure is minimized (distance or location). An interlock is a safety feature that works with guards to ensure the guard is in place before the machine can run or to stop the machine if the guard is opened. Because it’s a mechanism used to support safeguarding rather than a separate category, interlocks aren’t listed as one of the three independent means. That’s why the item describing interlocks isn’t part of the three main means.