Final answer:
Control lines in controlled access zones serve as safety barriers and must be highly visible, strong enough to withstand stress of at least 200 pounds, connected to stable structures, and extended along the entire length of hazardous edges.option b is correct
Step-by-step explanation:
When discussing controlled access zones in an engineering or safety context, certain criteria must be met for the control lines that delineate these zones. These control lines must be:
- Marked with high-visibility materials at regular intervals to ensure they are conspicuous.
- Constructed to be durable enough to withstand a considerable amount of stress, specifically at least 200 pounds, to ensure they remain intact and serve as an effective barrier.
- Securely connected on each side to fixed structures such as a guardrail or wall to provide stable demarcation points.
- Extended along the entire length of the unprotected or hazardous edge to provide a clear boundary for the zone.
Control lines are similar to the mobile guide lines described in missions that were positioned to create 'corridors' for divers to inspect. The lines would be moved as needed and served to clearly mark the path that should be followed or area that is to be managed, a principle that directly translates to the purpose of control lines in safety protocols.