CompTIA A+ Core 2 (220-1202)Operational ProceduresEasy
Before opening a desktop computer case to replace a component, a technician should attach an anti-static wrist strap. What is the PRIMARY purpose of this device?
- ATo reduce electrical current flowing to the power supply
- BTo ground the technician and prevent electrostatic discharge from damaging components
- CTo insulate the technician from AC voltage while the system is powered on
- DTo prevent the technician from dropping small screws
Show answer & explanationAnswer & explanation
Correct answer: B. To ground the technician and prevent electrostatic discharge from damaging components
An anti-static wrist strap grounds the technician's body, equalizing electrical potential and preventing electrostatic discharge (ESD) that can silently damage sensitive electronic components.
Why the other options are wrong
- A. The strap does not regulate current to the power supply.
- C. The strap does not protect against AC voltage; the system should be unplugged for that.
- D. Wrist straps are unrelated to physically holding screws.
ESD Wrist Strap
A grounding device worn on the wrist and connected to a grounded point to equalize electrical potential and prevent electrostatic discharge damage to electronic components.
- Protects against invisible ESD damage
- Must be connected to a proper ground
- Should not be used with high-voltage components like CRTs or PSUs
Memory trick: Ground Yourself, Save the Chips.