What safety procedure should be followed to minimize the risk of electrical shock?

A technician needs to replace a faulty power supply unit (PSU) inside a desktop computer.

What safety procedure should be followed to minimize the risk of electrical shock?
A . Disconnect the PSU from the motherboard but leave the computer plugged in for grounding
B . Ensure the computer is unplugged and press the power button to discharge any residual power
C . Wear rubber gloves and proceed to replace the PSU without unplugging the computer
D . Spray the interior with compressed air while the computer is plugged in to remove dust before
proceeding

View Answer

Answer: B

Explanation:

Correct Answer. B. Ensure the computer is unplugged and press the power button to discharge any residual power Unplugging the computer and pressing the power button to discharge any stored energy in capacitors minimizes the risk of electrical shock when replacing the power supply unit. This procedure ensures that no residual power is present that could cause an electrical shock.

Option A is incorrect because leaving the computer plugged in poses a risk of electrical shock.

Option C is incorrect as wearing rubber gloves does not eliminate the hazard of working on a powered device.

Option D is incorrect because using compressed air on a plugged-in computer does not adhere to safety standards and increases the risk of electrical discharge.