Practice Quiz

CompTIA A+ 220-902

Category - Operational Procedures

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You here a rattle in an employee’s computer and you open the case while the computer is still running. You notice a loose cable and reach in to tighten the connection. The fan is also making a noise so you use WD-40 to lubricate the fan. What safety errors have you just committed? Choose all that apply.
  1. Never use WD-40 to lubricate a fan.
  2. Never tighten a loose connection in a PC.
  3. Never reach into a PC case without taking ESD precautions.
  4. Never open a PC while it is running.
Explanation
Answer: A, C, and D - Opening a computer while it is running is a potential risk for inadvertent damage. WD-40 is not to be used for lubricating computer case fans.

Key Takeaway: Opening a computer case while it is running could inadvertently damage the inside of the machine or risk electrical shock. Never reach inside a computer without taking proper ESD precautions. WD-40 contains alcohol and will destroy the cooling fan. Use very lightweight oil for small equipment.
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