Installed mechanical safeguards are required around all these machine areas except

Installed mechanical safeguards are required around all these machine areas except

• A. Grinding machines
• B. Lathes
• C. Trajectory Zone
• D. Milling machines

Answer: (C)

The idea here is that mechanical safeguards are placed where there are actual moving parts and points of operation that could injure a worker, or where debris and chips could be ejected. Grinding machines, lathes, and milling machines all have exposed rotating spindles, wheels, or cutting tools, so guards or barriers are installed to prevent contact and to contain hazards. The trajectory zone is the area where the moving parts could travel or reach during operation. It’s a useful way to think about risk, but it isn’t a specific machine area that you bolt a physical guard onto. Guards are used around the actual points of operation and moving components, not to enclose an abstract path of movement. Therefore, while guards are required for the machines mentioned, they are not installed around the trajectory zone in the same sense.

The idea here is that mechanical safeguards are placed where there are actual moving parts and points of operation that could injure a worker, or where debris and chips could be ejected. Grinding machines, lathes, and milling machines all have exposed rotating spindles, wheels, or cutting tools, so guards or barriers are installed to prevent contact and to contain hazards.

The trajectory zone is the area where the moving parts could travel or reach during operation. It’s a useful way to think about risk, but it isn’t a specific machine area that you bolt a physical guard onto. Guards are used around the actual points of operation and moving components, not to enclose an abstract path of movement. Therefore, while guards are required for the machines mentioned, they are not installed around the trajectory zone in the same sense.