IT Essentials Chapter 2
What is ESD?
(Electrostatic Discharge) The passage of a static electrical charge from one item to another.
How much ESD is released before a person can feel it?
3,000 volts
How much ESD is released to ruin a computer?
30 volts
According to the U.S. Environmental Protection Agency (EPA), how much lead might be in a CRT?
4 pounds of lead
This tool is used to test the integrity of circuits:
A Digital Multimeter
Which tool is used to fasten wires to termination blocks?
A Punch down
What peripheral device should never be plugged into a UPS device? Why?
A laser printer because it could overload the UPS
What should you use to avoid scratching or leaving debris on computers?
A soft, lint-free cloth
What is a best resource to have with you when repairing a computer in the field that can be used for research, downloading and communicating?
A working computer
Attachment point for the clip on an anti-static strap:
An unpainted metal surface.
What condition refers to a reduced voltage level of AC power that lasts for a period of time?
Brownout Brownouts occur when the power line voltage drops below 80 percent of the normal voltage level and when electrical circuits are overloaded.
Which tool is used for bundling cables together?
Cable Ties
What replacement components should a technician keep in their tool kit for miscellaneous repairs?
Case Fan; Mother board; CPU Fan; Power Supply; RAM; Hard Drive; NIC; Sound Adapter; Audio Adapter; and an SSD
What does the Windows Action Center do?
Checks the status of essential security settings
Which tool is used to blow dust out of components?
Compressed Air
What do we call the intrusion of outside electromagnetic signals in a transmission media (like a copper wire)?
EMI or Electromagnetic Interference
Why is a floor mat good practice in a repair depot?
Easier to ground and reduce ESD
True or False; You should spray glass cleaner directly on the mouse or screen.
False
True or False; You don't have to worry about loose clothing, long hair, or dangling jewelry when working on a system
False; You must lose the loose clothing and dangling jewelry and tie up the long hair.
When should you never wear an antistatic strap during repair?
If your repairing a power supply
What is the Disk Management software used for?
Initializes disks, creates partitions, and formats partitions
Why is dust buildup damaging to electronic components?
It traps the heat and causes the components to over heat
What toxic element is commonly found in batteries?
Mercury.
The SDS contains what valuable information?
Name of the material Physical properties of the material Hazardous ingredients contained in the material Reactivity data, such as fire and explosion data Procedures for spills and leaks Special precautions Health hazards Special protection requirements
What are the safety instructions when there is a fire?
Never fight a fire that is out of control or not contained. Always have a planned fire escape route before beginning any work. Get out of the building quickly. Contact emergency services for help. Locate and read the instructions on the fire extinguishers in your workplace before you have to use them.
Should fan blades be allowed to spin when you're cleaning components? Why or why not?
No because the motors can be ruined if they are spinning and the device is not on.
Can you use a regular vacuum for computer components? Explain your answer.
No! The vacuum had discharges static electricity and sprays it out onto the computer components, aka, causing damage.
What agency in the U.S. requires that all hazardous materials be accompanied by a SDS when transferred to a new owner?
Occupational Safety and Health Administration (OSHA)
Which tool used to optimize space on a hard drive to allow faster access to programs and data?
Optimize Drives
What is P.A.S.S?
P=pull the safety pin out A=Aim low S=squeeze S=sweep back and forth
Which condition refers to a sudden increase in voltage which lasts for a few nanoseconds?
Power Surge
This substance found in laser printers should also be disposed of according to regulations.
Printer toner kits and printer cartridges
What type of interference affects wireless networks?
RFI or Radio frequency interference (Microwaves do this too!)
What should a technician do with batteries?
Recycle them
A technician accidentally spills a cleaning solution on the floor of the workshop. Where would the technician find instructions on how to properly clean up and dispose of the product?
Regulations for the disposal of the items on this page vary from state to state and from country to country. Check your local environmental regulation agency.
General safety
Remove your watch and jewelry and secure loose clothing. Turn off the power and unplug equipment before performing service. Cover sharp edges inside the computer case with tape. Never open a power supply or a monitor with a built-in power supply. Do not touch areas in printers that are hot or that use high voltage. Know where the fire extinguisher is located and how to use it. Keep food and drinks out of your workspace. Keep your workspace clean and free of clutter. Bend your knees when lifting heavy objects to avoid injuring your back. Wear safety goggles to prevent damage to eyesight
Which tool is used to check the integrity of files and folders on a hard drive by scanning the disk surface for physical errors?
Scandisk or CHKDSK
Which condition refers to a sudden increase in voltage, which is usually caused by lighting?
Spikes
Which type of power protection device isn't as reliable as a UPS, but still provides battery power?
Standby power supply (SPS)
If you want to restore damaged or lost Windows files, what disk can you use?
System File checker
What is the first step that should be performed when servicing computer equipment?
The computer must be powered off and unplugged
What steps should be taken before opening and cleaning inside any device?
The device must be powered off and unplugged
What needs to be next to your skin in order for the strap to work?
The metal on the back of the wrist strap
Why shouldn't a pencil be used inside a computer to change the setting of the switches or to pry off jumpers?
The pencil lead can act as a conductor and may damage the computer components.
What should you do if a component takes excessive force to remove or add?
There is something wrong, take a second look. If you still can't find anything, refer to the device manual or diagram for additional information.
What can happen to screws if you over-tighten them with a screwdriver?
Threads of bolts can be damaged
This tool is used to trace cables:
Tone Generator
TRUE/FALSE Clean dusty components with a can of compressed air.
True
TRUE/FALSE Do not use ammoniated glass cleaners or any other solution on an LCD screen.
True
True or False; To prevent ESD damage, you should use antistatic wrist straps when working on computers
True
True or false; you should keep your components in a antistatic bag before use to prevent ESD
True
True or False; You should wear the antistatic wrist strap when repairing power supplies or monitors.
True? (Doesn't really say)
What does the Windows Firewall protect against?
Unauthorized to and from your computer.
A technician wants to limit the chances of ESD affecting his workspace. Which three precautions should be taken? (Choose three.)
Use the Antistatic Mat Standing on the mat Wearing the antistatic wrist strap
What free Windows tool protects against viruses and spyware?
Windows Defender
This tool is used to expose the bare wires so it can be crimped or connected.
Wire Stripper
Which tool is used for cutting?
Wire cutters
What type of tools should be avoided when working inside a computer
magnetized tools, such as screwdrivers with magnetic heads, or tools that use extension magnets to retrieve small metal objects that are out of reach.
What can be used to safely clean the exterior of cases and monitors?
mild cleaning solution on a damp, lint-free cloth.
Which two tools can help protect against ESD?
the antistatic wrist strap and the antistatic mat.
