4.4 Given a scenario, use proper safety procedures
📘CompTIA A+ Core 2 (220-1202)
When working with computers, servers, or other IT equipment, safety is critical. Personal safety means protecting yourself from injuries, electric shocks, or exposure to harmful substances while repairing or maintaining devices. Below are the key areas you need to know:
1. Disconnect Power Before Repairing a PC
- Why it’s important:
Computers and servers run on electricity, and even when turned off, some parts may still have live power (like the power supply). Touching components while powered can cause electric shock or damage hardware. - Best practices in IT:
- Always shut down the device properly before opening it.
- Unplug the power cord from the wall or power strip.
- For laptops, remove the battery if possible.
- If working on large servers, follow the data center power-off procedures, which may include locking out circuits.
- Exam tip: Remember: “Never work on a live PC”. This is often tested as a scenario question.
2. Lifting Techniques
- Why it’s important:
IT equipment like servers, UPS units, or network racks can be heavy. Improper lifting can cause back injuries or muscle strain. - Safe lifting steps in IT:
- Assess the weight before lifting. Ask for help if it’s too heavy.
- Keep your back straight and bend your knees.
- Lift with your legs, not your back.
- Use handles or grips on equipment if available.
- Use tools like carts or trolleys for heavy servers or multiple boxes of devices.
- Exam tip: Questions may show a scenario with a heavy device and ask for the proper lifting technique.
3. Fire Safety
- Why it’s important:
Electrical components can overheat and sometimes cause fires. IT environments, especially data centers, must prevent and respond to fire risks. - Fire safety in IT:
- Know the fire extinguisher types:
- Class C: For electrical fires (most common in IT).
- Class ABC: Can handle electrical and general fires.
- Keep fire extinguishers accessible in server rooms or work areas.
- Avoid blocking emergency exits with equipment.
- Do not use water on electrical fires—it’s dangerous.
- Regularly inspect power cables and outlets to prevent overheating.
- Know the fire extinguisher types:
- Exam tip: Many scenarios ask which extinguisher to use in an electrical fire. Remember Class C for live electronics.
4. Safety Goggles
- Why it’s important:
When working inside computers or servers, tiny components or debris can fly out and injure your eyes. This can happen when:- Using screwdrivers or other tools near boards
- Cleaning with compressed air
- Removing damaged parts
- Best practices:
- Always wear safety goggles when performing hardware repairs that may produce flying debris.
- Ensure goggles fit snugly and are anti-scratch for clear visibility.
- Exam tip: Questions may describe a scenario of cleaning or repairing hardware and ask which safety item to use—answer: safety goggles.
5. Air Filter Mask
- Why it’s important:
Server rooms and old computers can have dust, mold, or fine particles that are harmful if inhaled. These can come from:- Inside old PCs or laptops
- Network racks and cooling vents
- Cleaning dust with compressed air
- Best practices:
- Wear an air filter mask (respirator or N95 type) to prevent inhaling dust.
- Ensure masks fit properly to be effective.
- Combine with good ventilation in rooms where dust is present.
- Exam tip: Scenario questions may describe cleaning old computers or servers; the correct safety tool is an air filter mask.
✅ Key Takeaways for the Exam
- Always disconnect power before working on computers.
- Use proper lifting techniques to prevent injury.
- Know fire safety rules and extinguisher types (Class C for electrical fires).
- Wear safety goggles when working on components that could produce flying debris.
- Wear an air filter mask when cleaning dusty hardware.
This section focuses entirely on protecting yourself while working in IT environments. Questions often use scenarios like:
- “You are cleaning a dusty server rack. Which personal safety equipment should you use?” → Air filter mask + safety goggles
- “You need to move a heavy UPS unit. How should you lift it?” → Lift with legs, keep back straight
- “A short circuit starts a fire in a PC. Which extinguisher should you use?” → Class C extinguisher
