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81 Cards in this Set
- Front
- Back
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ESD =
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Electrostatic discharge
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Regular cleaning of your PC will _____,_____ and ______.
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prolong the life of components
help prevent ESD help prevent Overheating |
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The best form(s) of water to use when cleaning CPU components is _______ or _______.
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filtered
distilled |
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If water alone cannot clean the area, use a mild soap solution. ____ soap is best.
Be sure to ______ it throroughly. |
Dish
dilute |
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________ ________ is used to clean electrical contacts and components such as ________ ______ drive heads.
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Denatured Alcohol
Floppy disk |
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Never use Denatured Alcohol on mechanisms such as _____ or ______ ______ _____.
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motors
rubber drive belts. |
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Some monitor screens have a special coating that can be damaged by _______ _______ cleaners such as _______.
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commercial glass cleaners
Windex. |
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NEVER use ______ _______ on an LCD display screen. You can melt the screen, instead use either ______ ______ or a ______ and _______ solution.
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glass cleaner
clean water vinegar/water solution. |
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What is the ratio for a Vinegar/water solution. Great for monitors, LCDs or scanner beds.
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1 part vinegar & 4 pars H20
(WHITE VINEGAR ONLY) |
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Fabric softener solution is made up of _____ part fabric softener to _____ parts H20 to clean the plastic casing of the computer components.
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1 part fb to 10 parts h20
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________ or ________ come in spray from and as premoistened toweletts. (Commercial cleaning solutions)
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ComputerBrite
ComputerBath |
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Name 5 cleaning tools for a proper cleaning tool kit.
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1 Canned Air
2 Lint-free cloth 3 Small soft bristled brush 4 Swabs 5 Non-static vacuum. |
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Canned air comes in 2 different forms; the ______ propellant kind and the kind that uses compressed ____.
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Liquid
C02 |
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Should you always keep the can of canned air upright?
Why? |
Yes, because it can spray your cpu's components with liquid (irreversible damage) and you with frostbite.
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How long do you shake a can of air before use?
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NEVER!
It doesn't need to be shaken and could EXPLODE! (small risk) |
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Never use _____ _____ cleaning products to clean in or on your computer.
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Dry Dusting = use static to attract dust. BAD BAD BAD.
(ex. Swiffer sweeper) |
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Why are rubber erasers not recommended for cleaning grime from contacts.
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They contain acids that can leave a residue or destroy contacts.
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______________ can be used to suck dust and grime from inside your pc, but not a household version.
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Non-static Vacuum.
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If you have any doubts about a commercial cleaning solution you should______?
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Call the manufacturer before use.
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To clean track ball mouse _________ is recommended for the cover, buttons and ball.
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A damp cloth, a swab dipped in denatured alcohol for any loose dir, lint, and hair wrapped around the tracking rollers.
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How should an optical mouse sensor be cleaned?
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A lint-free swab dipped in denatured alcohol diluted with water does well.
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After cleaning your keyboard a good idea is to _________.
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let it air dry for 48 hours before use if you use any kind of cleaning liquids.
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Before cleaning your monitor, make certain that _______.
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The monitor is turned off and is unplugged. CRTs store energy even when unplugged so be careful not dead.
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How often should you remove your monitor cover for cleanings?
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NEVER NEVER NEVER remove your monitor cover for any reason!
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A ______ occurs when the supply of electricity drops dramatically but does not completely go out.
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brownout
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_________ occur when the power is completely lost.
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Blackouts
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Blackouts/brownouts can cause....
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damage to your cpu/components due to the reintroduction of power or data loss/corruption.
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EMI =
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Electromagnetic Interference.
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EMI = electomagnetic interference is caused by _______ or ________.
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electrical noise created by voltage carried between power cable running near each other/Excessively long cables.
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Effects of EMI are
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power sags(brownouts) and surges that can lead to data loss or component damage.
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______ _____ occur when the voltage on your power line rises suddenly to above-normal levels.
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Power spikes
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Name 5 types of electrial damage that can affect a PC.
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Brownouts
Blackouts Power spikes Lightning EMI |
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EMI occurs when two signals are close enough to each other to interfere with each other. (T/F)
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True
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Many techs call a UPS a _____ ______.
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battery backup
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UPS =
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Uninterruptible Power supply
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A ___ has built in batteries that supply power to your PC when the electricity coming through the power line drops below a certain level.
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UPS
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This device has an integrated alarm to notify you that your PC is running off of battery power.
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UPS
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A UPS gives you a short window of opportunity to save your data and shut the PC down properly. (T/F)
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True
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SPS = _____
and is a type of ____ |
Standby Power System
UPS |
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A _____ actively monitors electricity coming through the power line and begins supplying power as soon as the unit detects a sag.
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SPS
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UPSs come in 2 main forms, the ______ and ______.
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SPS = Standby Power System
Online UPS |
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Electrial damage can occur to your PC even when using a SPS?
(T/F) Why? |
True, because it monitors then kicks in, but a brief moment no power, i.e. data loss/corruption
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A _____ ___ acts as a power source for your PC, using the outlet to simply recharge its internal batteries.
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Online UPS
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Which is better a SPS or a UPS? Why?
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UPS, pc runs off of the batteries no time lost for data loss/corruption.
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UPSs can also even out fluctuations in power from the outside. (T/F)
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True
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Plugging in a laser printer into a UPS draws massive amounts of power and can interfere with the function of the UPS and prevent proper shutdown. (T/F)
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True
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_____ ______ help absorb power surges so that your computer does not feel their effects.
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Surge Suppressors
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______ ______ can come in separate modules or integrated into a UPS.
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Surge Suppressors
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What is the only secure way to protect your PC from electrical threats.
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Unplug the PC and all its peripherals. (Monitor, scanner, modem, everything)
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EMI can be controlled by using _________________ and through the use of special ____ ________.
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cables with a Mylar coating
EMI noise filters |
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What is the safest way to store components for future use?
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In the original packaging or in an antistatic bag.
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_________ bags are great for avoiding ESD.
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Anti-static
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What is/are a good way to prevent moisture damage from stored components?
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put silica-gel packets in the anti-static bag with the components.
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ESD = ______
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Electrostatic Discharge
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The damage caused by ESD can be ________ damage or ________ ________.
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catastrophic
gradual ESD degradation. |
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Catastrophic ESD causes a computer component to fail _______.
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Immediately
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ESD degradation occurs when....and.....
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the effects of ESD are cumulative. Where low levels of ESD occur repeatedly. Eventually the effects get more & more noticeable.
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Name some common ESD protection Devices (5)
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1 Antistatic wrist strap
2 Ankle strap 3 Antistatic mats 4 Antistatic floor mats 5 Antistatic sprays. |
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Antistatic devices work by ________.
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Evening out the differences between your body's electrical potential of the electrical potential of your PC or PC component.
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Everything has a certain ______ _______, or how charged it is relative to the zero ground of the Earth.
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Electrical Potential
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One common way to ground yourself before touching any of your system components is ______.
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By touching a metal surface such as the exterior of the PC power supply.
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Antistatic wrist/ankle straps do what?
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Keep you at same relative electrical ground level as the computer components on which you are working.
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Antistatic wrist/ankle straps can attach/go to what.
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Clip goes to a metal device,
Prong goes in the ground of an electrical outlet to ground you. |
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Antistatic wrist/ankle straps help fight ESD when working with a CRT or other high voltage device. (T/F)
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False, they increase the chances of the wearer getting severely shocked.
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Never remove your antistatic wrist/ankle strap for any reason. (T/F)
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False, CRT/high voltage areas do not mix well with a ESD bracelet, and don't forget before walking away.
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Antistatic Mats/floor mats do what?
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Help dissipate ESD for a work area or a floor. An ESD mat is like a large placemat.
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What is the difference between a ESD mat and an ESD floor mat.
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The floor mat is larger and the mat comes with a metal clip for a antistatic strap.
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Which should you use and why.
Regular bags or antistatic bags to store/move components? |
Antistatic, regular plastic conducts static electricity and is very bad.
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Antistatic sprays are good to help keep down static, you should ______ use these sprays directly on components.
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NEVER!
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Antistatic sprays are very effective at dissipating ESD in your work area. (T/F)
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False, it is not recommended or effective.
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The weather and certain types of clothing can effect the amount of ESD potential. (T/F)
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True
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What type of weather can increase the chances for ESD.
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Cold & Dry
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What is the best type of material for clothes to minimize ESD.
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Most natural fibers, cotton & linen,
BUT NOT SILK. |
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What types of fabrics are good to wear
bad to wear for dealing with ESD. |
Good. cotton/linen
Bad. Silk/Synthetics |
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What type of soled shoes are good to wear to prevent ESD.
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Rubber soled.
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Is wearing jewelry good/bad when working on a computer?why?
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BAD. you can short out components by touching them, scratching/scraping things.
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The type of Extinguisher to use on a computer or other electrical fire is the Type __.
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Type C
or Type ABC |
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What is the proper way to dispose of batteries?
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Take them to a recycling center or send them back to the mfg.
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What is the proper way to dispose of a nonfunctional CRT?
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Send it to a commercial recycler or contact your city's hazardous waste mgt dept.
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MSDS = ________
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Material Safety Data Sheet
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If you have any doubts or questions about how to handle and dispose of chemicals or compounds you should refer to the ____.
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MSDS
Material safety data sheet |
