100-140 Question 53
Select 3You are tasked with replacing a power supply unit (PSU) in a desktop computer. Before starting the procedure, which safety precautions should you take to minimize risks such as electrical shock, ESD damage, and personal injury?
- A
Wear an anti-static wrist strap and ensure it is properly grounded.
- B
Ensure the computer is powered off and unplugged from the electrical outlet.
- C
Keep liquids nearby to clean any dust or debris during the replacement process.
- D
Touch the PSU connectors to confirm they are safe to handle before starting the replacement.
- E
Inspect the area for potential fire hazards such as flammable materials near the workspace.
Show answer and explanation
Correct answers: A, B, E
Explanation
When working with computer hardware, safety is paramount. Wearing an anti-static wrist strap prevents ESD, which can damage components, while ensuring that the computer is powered off and unplugged minimizes electrical shock risks. Checking for fire hazards like flammable materials ensures the workspace is safe. Avoid bringing liquids near electronics and do not touch connectors unnecessarily to further reduce risks.
- A. Correct.
Wearing an anti-static wrist strap that is properly grounded prevents electrostatic discharge (ESD), which can damage sensitive computer components.
- B. Correct.
Ensuring the computer is powered off and unplugged minimizes the risk of electrical shock while working on the system.
- C. Incorrect.
Keeping liquids nearby is unsafe as they could spill onto electronic components, causing short circuits and damage.
- D. Incorrect.
Touching the PSU connectors is dangerous and unnecessary. Instead, always assume they may carry residual charge and avoid direct contact.
- E. Correct.
Inspecting the area for potential fire hazards helps ensure a safe working environment and reduces the risk of accidental fires during the procedure.