FreePractice - Part 1 (ver 1.2.00)

Click on the MOST correct answer


1 The power supply in the PC is excessively dirty. How would you clean it?
A vacuum cleaner
All purpose cleaner
A damp cloth
Compressed air
2 A hard drive should not be:
parked and boxed when removed from the computer
protected from magnetic devices
defragmented and backed up at regular intervals
formatted before removing from the computer
3 What is the best method of cleaning a dusty PC keyboard?
Remove the bezel and blow out the dust
Remove the bezel and vacuum out the dust
Flush out the dust with a mild liquid detergent
Wipe out the dust with a wet cloth
4 What do you use to check for line-voltage sags?
Polarity tester
Line monitor
LAN analyzer
Breakout box
5 Which of the following is most likely to cause a problem with an unprotected hard disk drive?
A magnetic field from a large speaker
X-ray from a nearby monitor
Solar Winds
RFI from a nearby TV
6 Which is not a reason why compressed air is preferred over vacuuming for cleaning dust from a circuit board? Choose one:
Compressed air can generally provide greater cleaning power
Compressed air is less likely to cause ESD damage
Compressed air is less likely to spread dust
None of the above
7 Which of the following is most likely to protect a personal computer system during an electrical storm?
Totally disconnect all cables and power cords
Use surge suppressers on all AC outlets
Disconnect the line cords
Turn the AC power off
8 What do you use to check for line surges?
Polarity tester
Line analyzer
LAN analyzer
Breakout box
9 Which of the following statements are true? Choose one:
When not being used, a 5-1/4" disk should be kept in its protective sleeve
A hard drive should be protected from high magnetic fields
A surge suppresser can help to protect a computer installation from high voltage spikes
When cleaning PC boards, blowing dust away is preferred over vacuuming
All of the above
10 Which of the following should be used to clean the external plastic cabinets of computers and their peripherals?
Acetone
All purpose spray cleaner
Damp cloth with a mild detergent
Wet cloth with a mild detergent
11 The purpose of a line analyzer is: Choose one.
to warn of line surges
to warn of line sags
to warn of voltage spikes
to power the computer during power failures
12 Which of the following would make a computer installation safer? Choose one:
An extension cord
Extra long cables
A switch box
Surge suppressers
13 The hard drive makes a grinding noise. The cause is probably:
HDI (Head-to-Disk Interface)
a faulty SCSI connection
a software crash
a dirty read/write head
14 During the POST, what does a single beep indicate?
A hardware problem with the PC
A problem with an application software package
Normal operation of the PC
A hardware problem with a peripheral
15 Which of the following is NOT considered to be a field replaceable unit (FRU)?
CPU chip
Co-processor
SIMM
Power supply regulator
16 During what process do you tell the PC the types of drives being used?
CHKDSK
POST
SETUP
PREP
17 Diagnostics indicate that you have several bad field replaceable units (FRUs). What do you do?
Replace the motherboard
Replace the indicated FRUs one at a time, rerunning the diagnostics after each replacement
Replace all FRUs that were identified as bad
Investigate further to determine if the software is at fault
18 Which of the following would most likely result in the mouse pointer NOT being displayed when you switch from DOS applications to Windows applications?
A faulty mouse
A faulty serial interface
Wrong mouse driver in the CONFIG.SYS file
Wrong mouse driver in the SYSTEM.INI file
19 During what process do you tell the PC the amount of conventional or extended memory being used?
SETUP
POST
Boot up
PREP
20 Which of the following is least likely to be a field replaceable unit?
A board that plugs into the ISA bus
A socketed integrated circuit
A surface-mounted integrated circuit
A battery
21 Which of the following components will hold a charge even though power has been removed?
Diode
Transistor
Capacitor
Rectifier
22 Which of the following components holds a charge after power has been removed? Choose one:
Diodes
Rectifiers
Capacitors
Power transformers
23 A multimeter is set up to DC, Ohms, and 20k. How would a good 4-ampere fuse measure?
0.00
0.04
0.40
4.00
24 A multimeter is set up to DC, Ohms, and 20k. How would a bad 4-ampere fuse measure?
0.00
Infinitely high
0.04
4.00
25 The farad is the basic unit of measurement for:
resistors
inductors
capacitors
FETs
26 A circuit board in a computer can be destroyed by voltages as low as:
100 volts
200 volts
1000 volts
30 volts
27 What should an ordinary household wall outlet measure?
12 volts DC
104-130 volts DC
104-130 volts AC
210-250 volts AC
28 Which of the following can be caused by power source (electric company and building wiring) problems? Choose one:
Random memory errors
Damaged components inside the computer
Hard disk errors
Computer occasionally locks up
All of the above
29 Which of the following voltage levels would you not expect to find at the output of a typical personal computer power supply? Choose one:
+24 V
+12 V
+5 V
-5 V
-24 V
30 Which of the following voltages is NOT normally present at the output of a personal computer power supply?
+5 V
-5 V
+12 V
-12 V
120 V
31 The wires coming from the power supply in a personal computer are color coded to specify their purpose. What color are the ground (or common) wires?
Red
Black
Yellow
Blue
32 Ohms is the basic unit of measurement for:
capacitors
voltage
current
resistors
33 What is the basic unit of measurement for resistors?
Farads
Ohms
Amperes
Volts
34 What voltage should you measure on the yellow wires coming from the power supply in a personal computer?
+5 volts
-5 volts
+12 volts
-12 volts
35 Which of the following best describes a standby power supply?
It uses an isolation transformer to remove AC line noise
It uses metal oxide varistors (MOVs) to protect against AC line spikes
It consists of a battery connected between the AC line and the computer. The AC line charges the battery, and the battery supplies power to the computer
It consists of a battery connected between the AC line and the computer. The AC line simultaneously charges the battery and supplies power to the computer. When the AC line voltage is lost, the battery quickly switches so it, instead the AC line, powers the computer
36 What is the basic unit of measurement of capacitors?
Farads
Ohms
Volts
Amperes
37 Which of the following does not provide surge protection? Choose one:
A power conditioner
A standby power supply (SPS)
An uninterruptible power supply (UPS)
None of the above
38 The best uninterruptible power supplies (UPS) and standby power supplies (SPS) produce which of the following output waveforms?
Sine waves
Square waves
Stairstep waves
Sawtooth waves
39 Which of the following is the smallest power interruption that can cause memory errors or the computer to lock up?
1 second
1/200 second
10 seconds
1 minute
40 If a power supply has "watts capacity" rating of 200, what does this mean?
The power supply uses up 200 watts
The power supply always produces 200 watts. Therefore, the load you attach must be able to use up this much power
This is the minimum amount of power the supply can provide
The power supply can provide up to 200 watts
41 When measuring an unknown voltage
start with the meter set to its highest range
remove power until the meter is connected to the circuited
start with the meter set to its lowest range
set the meter to the Ohms function
42 When using an ohmmeter:
remove power to the circuit before attaching the meter
you must physically break the circuit to insert the ohmmeter
connect the meter in series with the component being measured
power must be applied to the circuit under test
43 Which of the following rules do not apply when using a multimeter?
Resistance is measured with the ohmmeter with all circuit power off
When measuring current or voltage, if you are unsure which range to use, start with the highest range and work down
Current and voltage are measured across the component with the power applied
When measuring current, turn off the power, break the current path to be measured, connect the meter in series with the current path, and reapply power
44 A new external modem does not work properly. Which of the following should be checked? Choose one:
The connections of the RJ-11 cable
The serial port settings
The communications parameters such as speed, parity, data bits, and stop bits
The communications software to make sure it is compatible with the modem
All of the above
45 The mouse works in MS-DOS but not in Windows 3.1. What do you do?
Check for the proper mouse driver in the SYSTEM.INI file
Check the jumpers on the motherboard
Check for the proper mouse driver in CONFIG.SYS file
Check the Mouse Trails number
46 You replaced your customer's motherboard. Before returning the unit to the customer, what should you do?
Reload the application software
Run SETUP
Write the word "serviced" and the current date on the board with a marker
Partition the hard drive
47 A customer calls with a printer problem. What information should you gather first?
Company name, customer name, type of computer, type of printer, the time at which he can bring the product in for service
Customer name, Company name, type of printer, nature of the problem
Where the printer was purchased, name of company, customer name
Customer name, Company name, Company address, time at which it would be most convenient for you to pick up the printer
48 A customer complains because he has been put on hold several times. What should you do?
Apologize for the inconvenience
Tell him you will find out who keeps putting him on hold
Explain how busy everyone is
Give him your personal telephone number
49 A customer calls and tells you that the cable you just sent him was defective. What do you do?
Tell the customer to call the manufacturer
Call the manufacturer for the customer
Tell him you will replace it if he can prove that it is defective
Replace the cable
50 A customer complains that the company that manufactured his computer is incompetent. What do you tell him?
Explain that you are not associated with that company
Agree with him
Ask him what he expects you to do about it
Inquire as to why he feels that way
51 You are giving directions to a customer on the phone. If the customer is having problems following your directions, what should you not do?
Ask if there is someone else you could speak to
End the call because he can't follow directions
Refer him to a customer center
Tell him someone will call him back
52 You replace a faulty motherboard. Before returning the computer to the customer, you should:
run SETUP and setup the configuration
review the customer's programs on the hard drive
FORMAT the hard drive
restore the customer's programs to the hard drive
53 A customer calls and says that his computer keeps dying. After taking the customer's name, what sequence of questions should you ask?
Computer type, is the equipment under warranty, printer type, set up an appointment
Computer type, what the problem is, number of times it has occurred, set up an appointment
Set up an appointment, what the problem is, software they are using, computer type
Type of system, setup up an appointment, what the problem is
54 A customer calls and says that their Desktop Publishing System that was working fine yesterday will not perform certain functions today. Which of the following is the most appropriate question to ask?
Did anyone make any changes in the software or hardware between yesterday and today?
Are you certain that you are qualified to say what is working normally?
Have unqualified people been playing with the system?
Have you voided the warranty by doing modifications?
55 A customer complains that the printer you just returned after being serviced has a broken paper tray. What do you do?
Order a new paper tray for the customer
Explain that this will not affect the print quality in any way
Ask him what he expects you to do about it
Send him one of your paper trays as a replacement
56 A customer calls and complains that the computer you just serviced is still not working properly. What do you do?
Apologize and explain that it is a different problem than the one you repaired
Explain that the customer did something wrong
Refer him to another repair facility.
Offer to replace or re-service the computer
57 A customer calls and complains that the computer you just returned after being serviced is missing a power cord. What do you do?
Explain that most any power cord she has will work.
Order a new power cord from the manufacturer
Send out a replacement power cord
Explain to your customer that she must have misplaced the power cord
58 A customer complains that his laptop computer has lost the time and date information. What do you do?
Tell him to recharge the battery and run SETUP
Have him bring it in for repair
Send someone out to pick up the unit for repair
Give him the manufacturer's phone number
59 A customer calls with a question about how to make a change in the AUTOEXEC.BAT file. What do you do?
Explain that this procedure will void the warrant
Explain that this should be attempted only by a qualified service technician
Refer the customer to the MS-DOS manual
Politely answer the question
60 Which of the following is least likely to be affected by a virus?
Floppy disk
Hard drive
BIOS in ROM
A file in RAM
61 A disgruntled customer is critical of the company that made his equipment, what do you do?
Agree with him
Quote statistics to the contrary
Inquire as to why he feels that way and how you can help
Tell him it is out of your hands
62 Computer viruses are most likely to be spread via:
on-line services
pirated games software
licensed application programs
licensed operating systems
63 Which of the following is not a recommended way to minimize damage caused by a computer virus?
Frequently running a virus checker program
Frequently formatting your hard drive
Frequently backing up your data
Avoiding pirated software
64 A PC virus is least likely to attach itself to:
a data file
the boot sector of your hard disk
a .COM file
a .EXE file
65 Which MS-DOS files are concerned with viruses?
MSAV, VSAFE, and MWAV
VER, CHKDSK, and SCAN
SCANDISK and CHKVIR
DMDRVR and FINDVIR
66 A virus is detected and successfully removed from a customer's PC. What additional action should be taken to prevent re-infection?
Destroy all floppy disks that have been used recently on the PC
Scan all floppy disks that have been used recently on the PC
Disconnect the PC from the network
Reformat the hard drive on the PC
67 Which of the following files is most likely to harbor a virus?
COMMAND.COM
TEXTFILE.DOC
SALES99.XLS
IMAGE.BMP
68 Which of the following statements about PC viruses is not true?
The PC is infected only if it boots (or attempts to boot) from an infected disk; or if it executes an infected program
Viruses are not carried by PC data files
Some viruses reside in boot sector files
The PC can not be infected by attempting to boot from a non-bootable floppy
69 A customer complains because he has been on hold for so long. What should you do?
Explain how busy you are
Give him your direct number
Tell him the best time to call
Apologize for the inconvenience
70 A customer complains because a technician did not return his call. What should you do?
Find out who the technician was
Explain that the technicians are overworked
Apologize for the inconvenience
Make an excuse for the technician
71 What is the best ground to use when working on a personal computer?
Chassis
Common
AC outlet ground
Computer
72 When should you not wear a wrist band ground strap?
When working on a disk drive
When working on a CPU
When working on memory
When working around an exposed cathode ray tube (CRT).
73 Once an IC is mounted on a circuit board it is:
not susceptible to ESD damage if the board is not installed in the PC
still susceptible to ESD damage
not susceptible to ESD damage if the board is properly installed in the PC
not susceptible to ESD damage as long as the computer is turned off
74 Which of the following could generate electrostatic voltages high enough to cause ESD damage? Choose one:
Combing your hair
Walking across a carpeted floor
Taking off your coat
Any one of the above
75 When shipping a board from one place to another, to avoid ESD damage, the board should be:
placed inside an anti-static bag
grounded at all times
kept in high humidity environment
sprayed with antistatic spray before packing
76 When you use the computer chassis for ground, what should you do?
Keep the line cord plugged into an AC outlet
Disconnect the line cord
Disconnect all test equipment from ground
Do not wear a wristband ground strap
77 Select the incorrect answer. Sometimes ESD damage:
is not immediately apparent but may show up weeks after the ESD incident
happens to ICs or circuit boards through improper handling
will "toughen" the computer against future ESD damage
is caused by charges that are too weak to be felt by a human
78 Which of the following techniques is the best way to prevent ESD damage?
Wear a properly connected ESD wrist strap when you work on microcomputer equipment
Work in a high humidity area
Work in a non-carpeted area
Handle circuit boards only by the edges
79 Which of the following types of mat will reduce static electricity problems?
Nylon
Plastic
Rubber
Vinyl
80 Which of the following statements is false?
You can feel any electrostatic discharge strong enough to damage an IC.
An IC is still susceptible to ESD damage even when properly mounted on a circuit board
ESD damage may not cause component failure until days or weeks after the actual ESD incident occurs
A simple act such as walking across the floor may generate static electricity levels high enough to cause ESD damage
81 Which is incorrect? An electrostatic potential too small to be felt by a human:
may still be high enough to damage an IC
cannot harm a properly installed IC
may be caused by simply walking across a floor
may damage a component so that the actual failure does not occur until weeks or months later
82 Why is it important that you use AC outlet ground when working with computer equipment?
It is easier to find than chassis ground
It is more likely to be at the same potential as your body
It is generally the most reliable earth ground that is readily available
Discharges to AC outlet ground occur more slowly and thereby reduce the level of damaging currents
83 Why is it NOT a good idea to wear a wrist band ground strap when working around an exposed cathode ray tube (CRT)? Choose one:
A CRT is like a big capacitor
A CRT maintains a high charge even when disconnected from the circuit
Wearing a ground strap increases your chances of accidental shock from the CRT
All of the above
84 Which of the following devices will reduce the risk of ESD?
Line analyzer
Waveform generator
Ion generator
White noise generator
85 Which of the following semiconductors is most susceptible to electrical noise and ESD?
TTL
FET
CMOS
DTL
86 Why should you keep the AC line cord plugged in if you are using the computer chassis as your source of ground?
Because the computer must have power applied to safely swap components
Because the computer must have power applied during all tests
To ensure that the computer chassis is at earth ground
Because this eliminates any possibility that you will receive an accidental electrical shock
87 An integrated circuit can be destroyed by a voltage as low as:
30 volts
100 volts
200 volts
1000 volts
88 A wrist grounding strap contains a:
resistor
capacitor
transistor
diode
89 Why is a CMOS memory chip more susceptible to ESD damage than its earlier TTL counterpart?
The CMOS chip uses a higher voltage
The dimensions of the transistors in CMOS are much smaller
Field effect transistors are impervious to ESD
Bipolar transistors are impervious to ESD
90 Which of the following devices will NOT reduce the risk of ESD damage?
A humidifier
An ion generator
A grounded wrist strap
A line analyzer
91 When shipping a circuit board from one place to another, you should first place the board in a(n):
vinyl container
plastic foam container
shielded container
antistatic container
92 When you work with solid-state devices, which of the following may help prevent ESD damage? Choose one:
Wear a properly connected ESD wrist strap
Use conductive work surface and anti-static floor mats
Handle circuit boards only by their edges
Store and ship boards in anti-static bags
All of the above
93 Which of the following statements is true?
Liberal use of anti-static spray is the best way to prevent ESD damage
Because of the possibility of ESD damage, you should not work on the computer during periods of high humidity
ESD damage is a leading cause of hardware failure during the shipping, handling, and installation of printed circuit boards and ICs
The main purpose of the grounded wrist strap is to protect the user from electrical shock
94 Why does a ground strap often include a resistor in the grounding path?
To limit the current to a safe level should the wearer experience an electrical shock
To speed up the discharge of static electricity
To reduce the amount of time required for a given charge to bleed off
To alert the wearer that an electrostatic charge has built up.
95 Using the computer chassis as a ground is most effective when:
the cover is removed from the computer
the computer is still plugged into the AC outlet
the computer is unplugged from the AC outlet
you are not wearing a wrist band grounding strap