100-140 Question 51
Select 3You are tasked with replacing a faulty power supply unit (PSU) in a desktop computer. Which of the following safety procedures should you follow to ensure a safe operation?
- A
Turn off the computer and unplug it from the power source before starting the replacement.
- B
Use an anti-static wrist strap to ground yourself during the replacement process.
- C
Keep the computer plugged in to maintain grounding while working on the PSU.
- D
Inspect the new PSU for any physical damage before installation.
- E
Wear rubber gloves to protect against electrical shocks.
Show answer and explanation
Correct answers: A, B, D
Explanation
When replacing a PSU, it is important to follow basic safety procedures to prevent electrical hazards and protect sensitive components. This includes disconnecting the computer from power, grounding yourself with an anti-static wrist strap, and inspecting the new part for damage. Following these steps ensures both personal safety and successful maintenance.
- A. Correct.
Correct. Turning off the computer and unplugging it from the power source is a critical safety step to eliminate the risk of electrical shock.
- B. Correct.
Correct. Using an anti-static wrist strap prevents damage to sensitive components caused by electrostatic discharge (ESD).
- C. Incorrect.
Incorrect. Keeping the computer plugged in poses a risk of electrical shock and should be avoided during maintenance.
- D. Correct.
Correct. Inspecting the new PSU for physical damage ensures that the replacement component is safe and functional before installation.
- E. Incorrect.
Incorrect. While rubber gloves may provide some insulation, they are not a recommended or required safety measure for replacing computer components.