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True/False
Indicate whether the sentence or statement is true or false.
____
1. The electrical system shown in the figure above is a closed system.
____
2. A transformer changes the amount of power in a closed system.
____
3. When changing DIP switch settings, use a graphite pencil or screwdriver tip.
____
4. EMI is caused by the magnetic field that is produced as a side effect when electricity flows.
____
5. All power strips have surge protection.
____
6. With a sleep switch controlling an ATX system and an operating system that supports the feature, if the user presses
the power switch on the front of the case while the computer is on, the OS will go through a normal shutdown
procedure before powering off.
____
7. In most troubleshooting situations, you will measure current, not voltage.
____
8. If you add a new hard drive to your computer, and it and the existing floppy drive each work independently, but data
errors occur when both are working at the same time, suspect a shortage of electrical power.
____
9. Devices that are Energy Star compliant go into a sleep mode in which they use less than 30 watts of power.
Modified True/False
Indicate whether the sentence or statement is true or false. If false, change the identified word or phrase to make the sentence or
statement true.
____ 10. A(n) ampmeter measures electrical current in amperes. _________________________
____ 11. When voltage increases, current increases. _________________________
____ 12. A(n) incomplete circuit occurs when the electricity is allowed to flow uncontrolled from the hot line to the neutral
line or from the hot line to ground. _________________________
____ 13. A(n) diode is a semiconductor device that allows electricity to flow in only one direction.
_________________________
____ 14. An AM radio can detect ESD. _________________________
____ 15. A(n) intelligent UPS can be controlled and managed from utility software at a remote computer, or from a computer
connected to the UPS through a serial cable. _________________________
____ 16. When booting your PC, if you hear a single beep, STARTUP has completed successfully, regardless of whether the
monitor is working or even present. _________________________
____ 17. Green Standards generally mean that the computer or device has a standby program that switches the device to
offline mode when it is not being used. _________________________
____ 18. Hard drive standby time is the amount of time before a hard drive shuts down. _________________________
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
____ 19. Electricity can be thought of as a stream of tiny charged ____ that flow like water along a path.
a. amperes
c. electrons
b. volts
d. watts
____ 20. Which of the following statements is false?
a. The resistance of a device is measured when the device is connected to an electrical system.
b. Watts are calculated by multiplying volts by amps.
c. Voltage is measured when the power is on.
d. None of the above.
____ 21. As the electrical potential difference increases, ____.
a. the electrical current increases
c. Either A or B.
b. the electrical current decreases
d. Neither A nor B.
____ 22. A condition of low resistance that allows current to flow in a completed circuit is called ____.
a. clamping voltage
c. suspend time
b. continuity
d. potential difference
____ 23. As the electrical resistance increases, ____.
a. the flow of electrons decreases
c. Either A or B.
b. the flow of electrons increases
d. Neither A nor B.
____ 24. An electrical circuit is created by all except ____.
a. voltage
c. resistance
b. current
d. continuity
____ 25. A computer power supply functions as a ____.
a. transformer
c. supplier
b. rectifier
d. Both A and B.
____ 26. When AC comes from the power source at the power station to your house, it travels on a(n) ____ line.
a. hot
c. AC
b. neutral
d. ground
____ 27. When AC completes the circuit from your house back to the power source, it travels on a(n) ____ line.
a. hot
c. AC
b. neutral
d. ground
____ 28. A ____ is a component included in a circuit and designed to prevent too much current from flowing through the
circuit.
a. resistor
c. transistor
b. fuse
d. rectifier
____ 29. For 110-volt circuits, ____ is generally used for the hot wire.
a. white
c. orange
b. green
d. black
____ 30. In PCs, ____ is generally used for the ground wire.
a. white
c. orange
b. green
d. black
____ 31. Gold and copper are examples of ____.
a. semiconductors
c. transducers
b. insulators
d. conductors
____ 32. Glass and ceramic, which resist the flow of electricity, are examples of ____.
a. semiconductors
c. transducers
b. insulators
d. conductors
____ 33. Silicon is an example of a(n) ____.
a. semiconductor
c. transducer
b. insulator
d. conductor
____ 34. If you turn off the lights in a room, scuff your feet on the carpet and touch another person, and you can hear the
discharge of electricity, you have released at least ____ volts.
a. 3000
c. 9000
b. 6000
d. 8000
____ 35. Don't wear a grounding bracelet when working ____.
a. inside a monitor
c. with a laser printer
b. with a power supply
d. All of the above.
____ 36. Temporary reductions of voltage are called ____.
a. sinks
c. brownouts
b. depressions
d. doze times
____ 37. Spikes are temporary surges of ____.
a. resistance
c. ohms
b. amperes
d. voltage
____ 38. Which provide backup power supply in the event that the AC fails completely?
a. surge suppressors
c. uninterruptible power supplies
b. power conditioners
d. Both B and C.
____ 39. ____ offers support for intelligent UPSs.
a. Windows NT
c. Windows 2000
b. Windows XP
d. All of the above.
____ 40. ____ is the most popular form factor.
a. Baby AT
c. ATX
b. Mini-ATX
d. AT
____ 41. One problem with the ____ form factor is that the CPU is placed on the motherboard in front of the expansion slots.
a. Baby AT
c. ATX
b. Mini-ATX
d. AT
____ 42. A riser card is found in ____ systems.
a. LPX
c. ATX
b. Mini-ATX
d. Flex-ATX
____ 43. For low-end desktop systems, compact cases do not follow the ____ factor.
a. LPX
b. NLX
c. Mini-LPX
d. Flex-ATX
____ 44. The figure above shows a(n) ____ power supply.
a. baby AT
c. ATX
b. mini-ATX
d. AT
____ 45. The temperature inside the computer case should not exceed ____ degrees F.
a. 100
c. 95
b. 113
d. 129
____ 46. ____ is a power management method used with Windows 98 and Windows 2000/XP and supported by system
BIOS.
a. APM
c. ACPI
b. DPMS
d. Both A and B.
____ 47. ____ is a power management method used for monitors and video cards.
a. APM
c. ACPI
b. DPMS
d. Both A and B.
____ 48. The ____ CMOS setting is the time that elapses before the system reduces 80 percent of its power consumption.
a. standby time
c. hang time
b. suspend time
d. doze time
____ 49. The ____ CMOS setting is the time before the system reduces 92 percent of its power consumption.
a. standby time
c. hang time
b. suspend time
d. doze time
____ 50. The ____ CMOS setting is the time before the system reduces 99 percent of its power consumption.
a. standby time
c. hang time
b. suspend time
d. doze time
____ 51. The "S" in DPMS stands for ____.
a. Signaling
c. System
b. Source
d. Setup
Yes/No
Indicate whether you agree with the sentence or statement.
____ 52. Does electron flow go from the positive terminal to the negative terminal?
____ 53. Is DC the most economical way to transmit electricity to our homes and workplaces?
____ 54. Is static electricity an electrical charge at rest?
____ 55. Does the figure above show a component in a static shielding bag?
____ 56. Once the fuse inside the surge suppressor is blown, does it continue to provide power without warning you that the
protection is lost?
____ 57. Do passive backplanes contain circuits other than bus connectors and some buffer and driver circuits?
____ 58. To measure current in amps, does the multimeter itself need to be part of the circuit?
____ 59. If a faulty power supply is suspected, is replacing the power supply the easiest way to fix it?
Completion
Complete each sentence or statement.
60. A(n) ____________________ is used to measure voltage.
61. ____________________ control the flow of electricity in a circuit.
62. Microcomputers require ____________________ current.
63. The figure above shows a(n) ____________________.
64. ____________________ inside a PC power supply create the even flow of current needed by the PC. They
maintain their charge long after current is no longer present.
65. A(n) ____________________ serves the same function for your telephone line to your modem that a surge
suppressor does for the electrical lines.
66. A(n) ____________________ is a device that can measure volts, amps, ohms, and continuity in an electrical
system.
67. FRU stands for _________________________.
68. ____________________ systems and peripherals have the U.S. Green Star, which indicates that they satisfy certain
energy-conserving standards of the U.S. EPA.
69. ____________________ current is current that cycles back and forth.
Matching
Match each correct item with the statement below.
a. volts
f.
b. amps
g.
c. ohms
h.
d. watts
i.
e. potential difference
j.
____
____
____
____
____
____
____
____
____
70.
71.
72.
73.
74.
75.
76.
77.
78.
transformer
alternator
resistance
rectifier
transistor
Used to measure power.
A property in an electrical system that opposes the flow of electricity.
Converts alternating current to direct current.
Measure resistance.
Changes the ratio of current to voltage.
Measure electrical current.
Can serve as a gate for an electrical signal and can amplify the flow of electricity.
Creates an electrical force which drives the electrons through the system between two points.
Used to measure potential difference.
Short Answer
79. What is the theory of conventional current flow?
80. What does Ohm's Law state?
81. How do you prevent the uncontrolled flow of electricity from continuing indefinitely?
82. List and briefly describe the two types of damage that ESD can cause in an electronic component.
83. Besides using a grounding mat, how can you also create a ground for the computer case? Why is this method still
safe?
84. What is a form factor?
85. What three things must you tell a multimeter before you begin?
86. What do you need to keep in mind if you try to use a Dell power supply with a non-Dell motherboard?