Final answer:
4) All of the above. Guardrails, safety nets, and personal fall arrest systems are engineers in control that can be installed to mitigate fall hazards.
Step-by-step explanation:
The engineer in control that is installed to mitigate fall hazards can include a combination of different safety measures. These measures are:
- Guardrails: These are physical barriers installed along the edges of elevated platforms or walkways to prevent falls. They act as a barrier and provide support to individuals.
- Safety nets: Safety nets are installed below elevated work areas to catch a falling person. They absorb the impact and prevent injuries.
- Personal fall arrest systems: These systems consist of a full-body harness, a lanyard, and an anchor point. They are worn by workers to stop their fall and protect them from experiencing a serious impact.
Therefore, the correct answer is All of the above as all the listed options are engineers in control that can be installed to mitigate fall hazards.