Final answer:
Workers must be protected with guardrail systems, safety nets, or personal fall arrest systems when working over dangerous equipment to prevent falls and injuries as mandated by OSHA.
Step-by-step explanation:
When working over dangerous equipment that one could fall onto or into, one must be protected by guardrail systems, safety nets, or personal fall arrest systems.
These measures are essential for workplace safety and are mandated by agencies such as OSHA (Occupational Safety and Health Administration) to reduce the risks of falls and injuries on worksites.
Fall protection systems, such as safety harnesses and lines, should be provided by employers along with other necessary safety equipment to ensure a safe working environment.