TestOut LabSim A+ Certification Practice Exam

Which action could be most physically harmful to you?

1. Adjusting a printer

2. Looking into the end of a fiber optic cable

3. Replacing a mouse battery

4. Connecting external devices

The correct answer is: Looking into the end of a fiber optic cable

Looking into the end of a fiber optic cable can be particularly harmful because fiber optic cables transmit light, and that light can be very intense. When you look directly into the end of an active fiber optic cable, you risk damaging your eyes due to the concentrated beam of light. This is especially concerning if the cable is carrying laser light, which is commonly used in fiber optic technology. The potential for eye injury means that this action can be deemed the most physically dangerous among the options provided. In contrast, adjusting a printer, replacing a mouse battery, and connecting external devices generally involve low risks of physical harm when appropriate safety precautions are followed. These tasks typically do not involve exposure to harmful light or significant physical hazards, making them safer in comparison.