Computer Safety & ESD
What does ESD stand for?
Electrostatic Discharge
This component is considered the “brain” of the computer.
CPU (Central Processing Unit)
Which tool is used to test power supply voltages?
Power supply tester or multimeter
What does OS stand for?
Operating System
What does IP address stand for?
Internet Protocol address
True or False – A PSU can still hold a dangerous charge even after being unplugged.
True
What does RAM stand for?
Random Access Memory
What type of screwdriver is most commonly used for PC repairs?
Phillips-head screwdriver
Name one common desktop operating system.
Windows, macOS, Linux (any valid example)
Which device connects a local network to the internet?
Router (or modem-router combo)
Name two ways to prevent dust buildup inside a computer.
Use compressed air, install dust filters, keep computer in clean environment
Which storage device is faster: SSD or HDD?
SSD (Solid State Drive)
What is the purpose of an anti-static mat?
To prevent static discharge from damaging components
Which built-in Windows tool allows you to check system performance and running processes?
Task Manager
What is the first step in CompTIA’s troubleshooting methodology?
Identify the problem
What is the boot order (or boot priority)?
This BIOS/UEFI setting controls which device the computer tries to start from first.
What component converts AC power from the wall into DC power for the computer?
Power Supply Unit (PSU)
Electric air duster or ESD-safe vacuum
When cleaning a fan, what tool should you use instead of compressed air cans for regular maintenance?
Electric air duster or ESD-safe vacuum
What command-line tool can you use in Windows to check the integrity of system files?
sfc /scannow
If a computer powers on but displays no image, name two components you should check first.
RAM, graphics card, monitor, or cables (any two valid)
Why is it dangerous to work on a computer while it is plugged in?
Risk of electric shock and damaging sensitive components
List two differences between DDR4 and DDR5 memory.
Examples: higher bandwidth, lower voltage, more efficient power use, higher max capacity
Name three preventive maintenance tasks for keeping a computer running efficiently.
clean dust regularly, update software, check cables/connections, replace failing parts, run antivirus scans
What is the difference between a clean install and an upgrade install of an operating system?
Clean install = wipes drive, installs fresh OS; Upgrade = installs new OS while keeping files/settings
Explain the difference between a hardware failure and a software failure.
Hardware = physical component failure; Software = issue with programs, drivers, or OS