Electrical Safety Basics
What is power-supply safety?
Definition: Never open or repair a power supply yourself.
Test Focus: Internal capacitors can store dangerous voltage.
What is an ESD wrist-strap check?
Definition: Verifying that a wrist strap is properly grounded.
Test Focus: Ensures safe discharge path before touching components.
What is a systematic troubleshooting approach?
Definition: Step-by-step method instead of guessing.
Test Focus: Follows CompTIA’s six-step troubleshooting model.
What does “double-check connections” mean in hardware assembly?
Definition: Verifying each cable and screw before powering on.
Test Focus: Prevents shorts or reversed plugs.
What is calm focus?
Definition: Taking a breath before reacting to an issue.
Test Focus: Prevents rushed mistakes and protects equipment.
What does “disconnect power before service” mean in computer repair?
Definition: Always unplug or remove the battery before servicing hardware.
Test Focus: Prevents electric shock or component damage.
What is humidity control in computer labs?
Definition: Keeping air moisture between 40–60 percent.
Test Focus: Low humidity increases static; high humidity causes corrosion.
What does “reproduce the problem” mean in troubleshooting?
Definition: Observe the error before taking action.
Test Focus: Confirms issue and narrows down causes.
What is using proper tools in PC maintenance?
Definition: Selecting the correct screwdriver or meter for the job.
Test Focus: Prevents damage and ensures accuracy.
What is communication under stress?
Definition: Speaking clearly even when systems fail.
Test Focus: Keeps teams coordinated during outages.
What is a ground wire used for in electrical safety?
Definition: Green or bare wire that safely directs stray current to earth.
Test Focus: Prevents electric shock and protects devices.
What is airflow management inside a computer case?
Definition: Arranging cables and fans for steady cooling.
Test Focus: Prevents overheating and dust buildup.
What is escalation in technical support?
Definition: Passing a problem to higher-level support when needed.
Test Focus: Demonstrates professionalism and efficiency.
What is an anti-static work mat?
Definition: Surface that grounds static charge during repair.
Test Focus: Part of an ESD-safe workstation.
What is prioritization in troubleshooting?
Definition: Deciding which problem to solve first.
Test Focus: Balances urgency, impact, and safety.
What is a surge protector?
Definition: Device that blocks voltage spikes from reaching equipment.
Test Focus: Rated in joules; protects against lightning or power surges.
What is proper anti-static bag use?
Definition: Storing components only inside approved static-safe bags.
Test Focus: Prevents unseen ESD damage during transport.
What is the reason rebooting is often the first troubleshooting step?
Definition: Safely restarting a device to clear temporary faults.
Test Focus: Always confirm data is saved first.
What is component verification before installation?
Definition: Checking part numbers and compatibility before install.
Test Focus: Avoids incorrect RAM, CPUs, or voltages.
What is professional composure?
Definition: Staying polite and steady when users are upset.
Test Focus: Demonstrates professionalism and customer empathy.
What is an uninterruptible power supply (UPS)?
Definition: Battery backup that keeps systems running during short outages.
Test Focus: Provides time to save work and shut down safely.
What is equipment labeling for safety?
Definition: Marking devices for voltage or service status.
Test Focus: Required for shared workbenches and troubleshooting safety.
What is root-cause analysis?
Definition: Finding the original reason for failure, not just the symptom.
Test Focus: Prevents repeat issues and improves service quality.
What is a Safety Data Sheet (SDS)?
Definition: Document describing chemical and handling risks.
Test Focus: Required for batteries, cleaning fluids, and toner.
What is reflection after action?
Definition: Reviewing what went well and what to improve.
Test Focus: Builds long-term troubleshooting skill.