Lesson 4 Chapter 1 - Cleaning and Maintenance Procedures

Question 1

What are 5 safe liquid cleaning compounds you can use for maintenance?

Answer 1

1. Clean water or soapy water solution
2. Denatured alcohol (or isopropyl alcohol 91%)
3. Glass cleaner
4. Water and vinegar (1 part vinegar, 4 parts water)
5. Commercial cleaning products

Question 2

What’s an important warning when cleaning with clean or soapy water?

Answer 2

Don’t let any water drip onto components or circuit boards, and let it dry completely before reconnecting anything to the computer or it can cause short-circuiting (water is an electrical conductor)

Question 3

What’s an important warning when cleaning with denatured alcohol?

Answer 3

Never use alcohol to clean motors or on rubber drive belts as it dissolves the motor lubrication in motor bearings and using it on a rubber belt can make it stretch and become brittle

Question 4

What’s an important warning when cleaning with glass cleaner?

Answer 4

Never use glass cleaner on a monitor screen it can damage the special coating, especially if it has ammonia as it can quite literally melt older LCD screens

Question 5

What are 6 cleaning tools a tech should have?

tails, volts, breathe, micro, horse

Answer 5

1. Phillip’s head
2. Multimeter
3. Compressed air
4. Lint-free cloths
5. Small soft-bristled brush and swabs
6. Non-static vacuum

Question 6

Compressed air comes in which 3 forms?

Answer 6

1. Compressed CO2
2. Liquid propellant
3. Electric dusters without harmful propellants and doesn’t create condensation

Question 7

What are 3 rules when using compressed air?

jordin, reach, twerk

Answer 7

1. Never breathe it in! It can kill you
2. Keep the can upright with liquid propellant, as tilting it can cause the liquid to squirt out and can cause frostbite and irreparable damage to the computer
3. Never shake the can, it doesn’t need it

Question 8

What’s a warning when using dry dusting products?

swiffer

Answer 8

Don’t use dry dusting products (such as a Swiffer wipe) because they clean using static charged cloths which could fry your components

Question 9

What’s a warning when using rubber pencil erasers?

pepsin, eye, rub

Answer 9

Never use rubber pencil erasers as they can contain acids that can destroy contacts and may rub the metal coating off the contacts

Question 10

What’s a type of vacuum cleaner you should never use? Why?

Answer 10

Never use a regular household vacuum as they can create static electricity

Question 11

For regular cleaning of the exterior of computer, monitor, and peripherals use? (2)

Answer 11

Water and a lint-free cloth, dampened not soaked
Compressed air

Question 12

For grime buildup on the exterior of computer, monitor, and peripherals use?

Answer 12

Soapy water

Question 13

For tougher cleaning chores (ink, crayon, tape adhesive) on the exterior of computer, monitor, and peripherals use? (3)

solution, diluted, cc

Answer 13

1. Vinegar and water solution
2. Denatured alcohol diluted with water
3. Commercial cleaner

Question 14

How do you clean a mouse’s recessed lens?

Answer 14

With denatured alcohol and a lint-free swab or lint-free cloth

Question 15

Can you shake a laptop keyboard upside down?

Answer 15

No, you should not shake a laptop

Question 16

What are 4 steps to cleaning a keyboard?

taylor swift, horse, fold, solution

Answer 16

1. Turn the keyboard upside down over a trash can
2. Use compressed air and brush to loosen debris
3. Fold a paper towel moistened with alcohol to clean grime from keys
4. Soapy water or other solution for sticky messes (disconnect keyboard first)

Question 17

What are some warnings to keep in mind when cleaning a keyboard? (3)

taylor swift, dc, air

Answer 17

1. Always unplug the keyboard before cleaning it (especially with any liquids)
2. Let the keyboard dry before plugging it in

Question 18

Best 2 ways to clean a monitor screen?

Answer 18

1. Vinegar and water
2. Commercial cleaning solutions specifically for monitors

Question 19

Warnings when it comes to cleaning monitors? (3)

gen pop, wind, direct

Answer 19

1. Don’t use general-purpose cleaning solutions on monitor screens, they’re for exterior plastics
2. Don’t use glass cleaners (especially with ammonia)
3. Don’t spray the solution directly onto the screen

Question 20

What should you do immediately after touching contact pins, connectors, and sockets?

Answer 20

Wipe them off with denatured alcohol and a lint-free swab

Question 21

When cleaning the inside of a case with air, what should you focus on? (7)

body, card, jordin, power in, out, door, sink

Answer 21

1. Motherboard
2. Expansion card adapters
3. Air vents
4. Power supply intake
5. Exhaust fan
6. Optical drive door openings
7. CPU heat sink

Question 22

What are 2 warnings when cleaning the inside of a computer case in regards to the fans and PSU?

if you touch a…., spray the…

Answer 22

If you touch a fan, clean it immediately
Spray the power supply with the compressed air straw at an angle to direct dust outwards not further in