Deck 4: Disassembly and Power

Question 1

DC stands for digitally corrected current.

Answer 1

False

Question 2

The output from the power supply to the computer devices is AC power.

Answer 2

False

Question 3

An overvoltage condition is when the voltage from the wall is over the rated amount.

Answer 3

True

Question 4

The effects of ESD are cumulative.

Question 5

An undervoltage condition is when the voltage from the wall is over the rated amount.

Question 6

When replacing a power supply, choose a power supply that is greater or equal in power rating.

Question 7

Keep humidity below 1 percent to reduce the threat of ESD.

Question 8

The power going into the power supply is DC power.

Question 9

A magnetic screwdriver is a good tool to have for dropped parts on a computer motherboard.

Question 10

The two most common types of computer power connectors are Molex and Berg.

Question 11

Ω is the symbol for ground.

Question 12

Two of the most typical power supply output voltages are +5 and +10 volts.

Question 13

A colored stripe on one side of a cable determines pin 1.

Question 14

ESDT is noise caused by electrical devices.

Question 15

Power surges can come through the telephone line.

Question 16

EMI is noise caused by electrical devices.

Question 17

Preventive maintenance is done when a computer is not working.

Question 18

A technician can cause data loss on the hard drive if the hard drive is mishandled.

Question 19

A continuity check is used to see whether the wires in a cable are good.

Question 20

A soldering iron is one of the most common tools used by technicians.

Question 21

ESD stands for

A) Enhanced Silicon Differential
B) Electric System Dynamics
C) Electronic Shock Discharge
D) ElectroStatic Discharge

Question 22

Your computer displays a disk error each time you attempt to access a CD. You take the computer to the PC shop and explain that you think the problem is a bad optical drive. ʺIʹm going to strip your computer down to the bare metal,ʺ the technician says, ʺthen Iʹll rebuild it and check out every piece until I make it work right. I do that with every machine brought in here.ʺ The technicianʹs method of repairing the computer:

A) Is used many times a day by most technicians
B) Makes you wonder about the experience level of the technician
C) Is worth the expense to get to the root of the problem
D) Is the first technique recommended by all knowledgeable technicians to solve computer problems

Question 23

EMI stands for

A) ElectroMagnetic Input
B) ElectroMagnetic Interference
C) ElectroMagnetic Impulse
D) Electronic Measurement Indicator

Question 24

In the computer industry, a trace is a

A) Metal line on the motherboard or adapter
B) Computer chip
C) Power booster TRansient Alternating Current Emulator
D) Small amount of something, as in a trace of data

Question 25

Margaret complains that her office computer locks up during the hottest month of the summer each summer for the past several years. The help desk technician suspects that the problem is related to RFI and asks

A) ʺDo you use cologne near the computer?ʺ
B) ʺDo you place a glass of water on your computer desk?ʺ
C) ʺDoes your computer have a surge protector?ʺ
D) ʺIs there a fan in your office?ʺ

Question 26

A noise produced by electrical device is

A) ESD
B) Standoffs
C) EMI
D) EDD

Question 27

You are responding to an email from an irate customer. The reply is as follows: ʺI am sorry the replaced part did not solve your problem. I will be happy to take a look at the computer again tomorrow. I can be there at 2 P.M. if that is convenient with you. You can either email me or I will check with you later today to see whether that works with your schedule.ʺ This is an example of proper written communication.

Question 28

Plug one end of the power cable into the wall and the other end into the computer while performing maintenance on a newer computer to

A) Reduce the chance of electricity hurting the system
B) Make the computer safe to work on
C) Provide extra power for a technicianʹs electric tools
D) Risk serious danger to the system because current runs through the motherboard, even when the computer is turned off

Question 29

An electronic component can be damaged with as little as volts of static electricity.

A) 2
B) 10
C) 30
D) 40

Question 30

A technician disassembles a desktop computer. After completely reassembling the unit, the technician observes that the motherboard standoffs were not installed. Read each statement below and select the one that best explains how the technician should handle the situation.

A) There is always a screw or washer left over. These things actually donʹt make a difference in the performance of the computer.
B) Start up the computer and take no other action if it works.
C) Correctly install the standoffs to prevent grounding problems or worse.
D) Push the standoffs against the traces until the traces touch the metal case and tape the standoffs in place. Boot the computer and complete the system check-up.

Question 31

You are responding to an email from an irate customer. On your reply, you send a copy to your boss so that he is informed of the situation. This is an appropriate tactic to take for proper written communication.

Question 32

ESD wrist straps should not be worn when working inside a .

A) Floppy drive
B) CRT monitor
C) Hard drive
D) Power strip

Question 33

What atmospheric condition can increase the potential for static electricity?

A) High temperatures
B) Atmospheric conditions have little impact on static electricity
C) Low temperatures
D) Low humidity

Question 34

A meter reading for a good cable wire shows 200 ohms.

Question 35

At what point can a static discharge be felt by the average person?

A) 3000 volts
B) 6000 volts
C) 12,000 volts
D) 24,000 volts

Question 36

How can you reduce the chance of static electricity harming your computer when an antistatic strap is not available?

A) Keep in contact with the metal case of the power supply.
B) Improvise by holding the metal found on your clothing such as a belt buckle with one hand and then work with the other hand.
C) Disconnect all batteries on the motherboard.
D) Avoid wearing garments made of synthetic fibers.

Question 37

A meter reading for a good fuse shows 0 ohms.

Question 38

If an ESD event occurs, the damage

A) Is reduced by wearing an antistatic wrist strap
B) Is not recoverable
C) Is reduced by turning off the computer
D) Is harmless

Question 39

RFI stands for

A) Radio Frequency Interference
B) Read Format Indicator
C) Real-time Frequency Impact
D) Resonating From Input

Question 40

You are responding to an email from an irate customer. The reply is as follows: ʺI am sorry the computer locked up again. I will be happy to take a look at the computer again tomorrow. It is probably your CPU or your RAM. Of course, it could always be the darn motherboard. I can be there at 2 P.M. TOMORROW if that is convenient with you. You can either EMAIL me or I will check with you later today to see whether that works with your schedule. :)ʺ This is an example of proper written communication.

Question 41

While at work, Max, a computer user, calls the computer repair center and requests that additional RAM be added to his new office PC. What tools would you consider most important for the technician to carry?

A) Some screwdrivers and nut drivers
B) A multimeter and probe
C) A chip insertion and removal tool
D) Soldering iron and solder

Question 42

On the motherboard the location of pin 1 might not easily be recognized. If the pin number is not stenciled on the board at the connector site, look for a

A) Red stamp on the board
B) Square shaped solder joint on the back of the board at the connector site
C) Pin with a shorter length
D) Blue stamp on the board

Question 43

A technician is looking at the ribbon cable that connects the hard drive to the motherboard and notices a thin red line running down the edge of the ribbon cable. The colored line tells the technician

A) The line is pin 1.
B) The ribbon cable is irregular and should not have been used.
C) Caution: handle with care.
D) Where to grab the cable when removing it.

Question 44

Where would you allow hibernation for a Windows XP laptop?

A) Through the system BIOS
B) Display control panel-Screen Saver tab
C) Display control panel-Power tab
D) Power options control panel-Power schemes tab
E) Power options control panel-Hibernate tab

Question 45

While working with a ribbon cable and connector, you discover that the connector is keyed. This means that the connector

A) Can be removed only with a key
B) Can be inserted only one way
C) Has been stamped with a special identity number/code
D) Is ready to perform the task that it has been assigned

Question 46

A laptop connected to AC power shuts down after prolonged periods. What is the most logical reason for this problem considering that it is not a laptop hardware component?

A) The laptop does not have the latest Windows service pack installed.
B) The laptop has a short in the AC adapter.
C) The laptop has blocked air vents.
D) The wall outlet is not producing the minimum voltage required for the AC adapter.

Question 47

AC wiring has both a and a _____.

A) Hot; neutral
B) Ground; hot
C) Ground; return
D) On; off

Question 48

Pin 1 on the ribbon cable connects to on the adapter or motherboard.

A) Pin 20
B) Pin 10
C) Pin 1
D) It depends the adapter type and motherboard model.

Question 49

For each service call the technician should be equipped with

A) Pen, pencil, and notepad
B) Basic tools
C) Good attitude
D) All these answers are important for a technician to have.

Question 50

From the following choices, choose the answer that best represents a proper disassembly tip:

A) Place removed adapters in an ESD bag.
B) Make note of motherboard jumpers.
C) Avoid stacking adapters one on top of another.
D) All these answers are true.

Question 51

A home computer user studies the computer and cries in frustration to you, ʺHow can I connect the ribbon cable if the connector on the motherboard does not have a pin 1.ʺ You look at the connector site on the motherboard and confirm the observation. You say, ʺIt looks like there is only a 40 there.ʺ From the items given, pick the most logical next step.

A) Remove the motherboard, turn it over, and look for a square solder joint at the connector site.
B) Replace the motherboard with one that has better documentation.
C) Turn the ribbon cable around so that the arrow on the ribbon cable is on the opposite end of the pin marked with a 40 and connect it to the motherboard.
D) Purchase the correct cable for use on the motherboard.

Question 52

Happy-go-lucky Harry decides to open his computer case to see what he could see. After a few moments of pondering, he notices five ribbon-like cables on the motherboard. He pulls at one and disconnects it from the motherboard. Delighted at his success at removing something, he pulls out all but one cable. He is interrupted by a phone call and when he returns, he realizes that he has forgotten which direction the cables face to be correctly reinserted into the board. What is the simplest thing you can do to solve Harryʹs problem?

A) Take away Harryʹs computer and tell him that he has been naughty.
B) Tell Harry to insert the cable in one direction and turn the computer on. If the function of the device works, then move to the next cable and repeat the test.
C) Tell Harry that all cables on the motherboard are placed with pin 1 on the right.
D) Tell Harry to look at the orientation of the colored stripe on the last remaining attached cable and plug the other cables in the same direction.

Question 53

The computer service desk received a work order to repair a keyboard. The computer user complained that he could not reconnect the keyboard into its socket on the motherboard. When the technician arrives, he examines the DIN keyboard connector and concludes the problem is routine and can be easily fixed. What tool would most likely be used to make the repair?

A) #2 Phillips screwdriver
B) Small needle nose pliers
C) 1/4-inch nut driver
D) Diagonal cutters

Question 54

Which of the following is best to clean a laptop screen?

A) Water and lint-free cloth
B) Monitor cleaning solution and lint -free urethane swabs
C) Alcohol-free cleaning solution and a sponge
D) Ammonia and lint-free cloth

Question 55

What unique danger does a magnetic screwdriver present while removing screws that hold an adapter card and motherboard, or picking up a dropped screw?

A) Scratching the surface of the adapter or board
B) Stripping the head of a screw
C) Induction of a current
D) Picking up more than what was intended

Question 56

Some tools a technician uses are nice to have, whereas others are a necessity. The nice-to-have tools include

A) Medium flat-tipped screwdriver, small flat-tipped tweaker screwdriver, and #1 Phillips screwdriver
B) #2 Phillips screwdriver, ¼ inch nut driver, and 3/16 -inch nut driver
C) Metric nut driver, pliers, AC circuit tester, and screw-starter tool
D) Small diagonal cutters, needle nose pliers, and spare floppy disks

Question 57

Take-it-apart Patty had some experience in troubleshooting her PC. One day she decided to take the next big step by completely disassembling her computer. When she reassembled it and turned the computer on, she heard nothing, smelled nothing, and saw nothing. Poor, Patty! She did something wrong! Look at the following choices and select the one that would have most likely caused the problem.

A) Pin 1 on the hard disk drive ribbon cable was plugged into the motherboard in the wrong direction.
B) Patty forgot to connect the power supply to the motherboard.
C) Patty plugged the mouse into the keyboard connector.
D) Patty put the internal modem in the wrong expansion slot.
E) Patty forgot to plug the power cord into the computer.

Question 58

To which of the following would you apply monitor cleaning solution?

A) A monitor
B) A lint-free cloth
C) A sponge
D) A lint-free urethane swab

Question 59

On the motherboard or the adapter card, the location of pin 1 might not be easily recognizable. If a number 1 is not stenciled on the board at the connector site, look for a

A) Number 2 stenciled on the board
B) Colored stamp on the board
C) Pin with a longer length
D) All these answers are true.

Question 60

You should avoid touching the adapter contacts because

A) The contacts are brittle and will easily break apart.
B) The contacts store enough electrical charge to produce a health risk if you are poorly grounded.
C) The dirt and grease from your fingers can collect on the contacts.
D) The contacts become too hot to touch.

Question 61

One practical method to lower frustration that arises when reassembling the computer is

A) Know where the traces on the motherboard lead.
B) Draw diagrams as you disassemble the computer.
C) Meditate before disassembling and reassembling.
D) Always have the correct tool on hand.

Question 62

After many parts have been removed from the computer, it is possible to become confused at certain points in the reassembly process. Which task has been identified as a likely point of confusion during reassembly?

A) Reinserting the drives in their original position in the drive bays
B) Identifying the colored edge of a ribbon cable
C) Identifying the difference between a CD/DVD drive and a floppy disk drive
D) Inserting a keyed cable into its socket

Question 63

If two power supplies are of equal wattage, the rule of thumb says the better one will be _____.

A) Heavier
B) Bigger
C) Made in China
D) Smaller

Question 64

Which of the following items listed are most likely to be found in a technicianʹs preventive maintenance kit?

A) Laser printer vacuum
B) Compressed air
C) Denatured alcohol
D) All of these items would most likely be found in the kit.

Question 65

Which procedure would you follow to prevent ESD?

A) Use warm water with soap and a general purpose cloth.
B) Move the computer to a different wall outlet and to a different location.
C) Unplug the computer and use an antistatic wrist strap.
D) Close the shades on the window to keep sun rays off the computer.

Question 66

Current is measured in .

A) Amps
B) Watts
C) Ohms
D) Farads

Question 67

Why is it best not to start cleaning a computer by using compressed air?

A) Some people may be sensitive to the dust blown into the air.
B) Pressure may damage the fragile electronic equipment.
C) Heavy dirt canʹt be moved by the compressed air.
D) The turbulence from the compressed air causes an RFI disturbance.

Question 68

Power is measured in .

A) Amps
B) Watts
C) Ohms
D) Volts

Question 69

Polarity is important when measuring .

A) AC
B) DC
C) Resistance
D) Capacitance

Question 70

Hard disk drives have self-parking heads that

A) Use software to make the heads pull away from the data area and park in a safe zone on the platter
B) Make the hard disk drive safe from any jolts and jarring vibrations
C) Automatically lock the heads in place away from the area where data is stored when the computer is turned off
D) Allow the hard disk to be disassembled and reassembled without the fear of losing data

Question 71

_____ is a measure of the pressure pushing electrons through a circuit.

A) Voltage
B) Amperage
C) Resistance
D) Capacitance

Question 72

Resistance is measured in .

A) Amps
B) Watts
C) Ohms
D) Farads

Question 73

Douglas was a proud home computer user. He had his computer for 3 years and never had to open the case once. Douglas bought a large can of compressed air at the computer store because he heard compressed air was the appropriate tool to use when cleaning the computer. He took the unplugged computer to the dining room, opened the case, stuck the nozzle a few inches from the motherboard and sprayed. After several seconds of spraying, there is a strong likelihood for Douglas to think

A) Oh, my gosh! The air forced some of the microchips off the motherboard.
B) I should have vacuumed first.
C) Compressed air isnʹt what it is cracked up to be.
D) This compressed air stinks! No one should be allowed to use this stuff.

Question 74

Capacitance is measured in

A) Amps
B) Watts
C) Ohms
D) Farads

Question 75

It can be dangerous for a technician to work on an unplugged monitor due to the charge held by the

A) Fuses
B) Resistance
C) Screen
D) Capacitors

Question 76

Three common tasks performed during preventive maintenance include

A) Vacuuming the computer, cleaning CD/DVD laser, and using urethane swabs to clean between the keys on a keyboard
B) Cleaning the CPUʹs gold pins, lubricating disassembled drives, and replacing cables
C) Using alcohol to clean the case, moving adapters to different locations on the motherboard, and pressing the power-on and off button 10 times in quick succession
D) Replacing the computer case, upgrading the microprocessor, and using soap and water to clean printer rollers

Question 77

Which of the following describe how to dispose of print roller cleaner?

A) MSDS
B) BIOS
C) EMI
D) SETUP

Question 78

is/are measures taken to prolong the life of the computer.

A) ESD
B) EMI
C) Preventive maintenance
D) Utilities

Question 79

Power is calculated as .

A) Amps X farads
B) Amps X ohms
C) Volts X amps
D) Volts X ohms

Question 80

Which of the following could be a valid voltage coming from the power supply to one of the computerʹs components?

A) +9 volts
B) +6 volts
C) +3.3 volts
D) 112 volts