Download - Chapter 4 Questions April
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Chapter 4 Questions
April, James, Nickie, & Alex
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1- 7 Questions
April
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1. Volts are a measure of what characteristic
of electricity?
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Answer:
electrical "pressure" differential
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2. What is the normal voltage of house
electricity in the United States?
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Answer:
120 V
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3. Hot wires in home wiring are normally colored _____
and ground wires in computers are normally
colored ______.
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Answer:
Black, Black
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4. What is the difference between a transformer and a rectifier? Which are found
in a PC power supply?
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Answer:
•A rectifier is a device that converts alternating current to direct current. (AC to DC) •A transformer is a device that changes the ratio of current to voltage.•Both are found in a PC power supply.
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5. What are the five voltages produced by an ATX or BTX power
supply?
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Answer:
+12V, -12V, +5V, -5V, +3.3V
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6. What is the purpose of the 4-pin auxiliary
connector on a motherboard?
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Answer:
To provide an additional 12V power supply to the processor.
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7. How many pins does the main power connector on a BTX
board have?
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Answer:
24-pins
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8-14 Questions
James Harris
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8
• What form factor for the case and power supply does a NLK motherboard use?
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Answer
•ATX
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9
• Describe the purpose of the ground line in a house circuit. What is the electrical symbol for ground?
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Answer
• To prevent uncontrolled electricity from continuing to flow indefinitely
• Earth
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10
• What is the basic electronic building block of integrated circuit?
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Answer
• Transistor
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11
• Why is a power supply dangerous even after the power is disconnected?
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Answer
• Electricity is built up in a power supply and can still cause a spark
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12
• What is the symbol for a diode?
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13
• What is a simple way to detect EMI?
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Answer
• Put a radio next to several electronic devices
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14
• What is an unintended, high-current, closed connection between 2 points in a circuit called?
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Answer
• Short or short cut
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15 – 22 Questions
Nickie
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15. Which form factor uses a riser card on the edge of the
motherboard?
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LPX and Mini-LPX has a riser card
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16. List 4 types of computer case form factors, What is the most popular type
of form factor for PCs today?
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1.AT 2. ATX
3. MicroTX4. BTX
ATX is the most commonly used form factor today.
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17.List 3 advantages an ATX system has over a Baby AT system.
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1. Fewer wires 2. Easier installation
3. Components on the motherboard don’t face each
other.
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18. List 4 computer symptoms that indicate a faulty power supply.
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1. Hang 2. Reboot
3.Give intermittent errors4.Wont boot at all
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19. According to ACPI standards, the S1 mode causes what 2 devices
to stop using power?
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hard drive and monitor
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20. What is another name for the ACPI standard S4 mode?
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Hibernation
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21. What power management standard is older then ACPI and has
mostly been replaced by ACPI?
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(APM)advanced power management.
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22. How can u easily tell if a computer is designed to comply
with Green Standards?
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The display of the green star energy logo
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23-30 Questions
Alex Coffey
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23.) What unit of measure is used to describe the amount of work a surge suppressor can do before it stops protecting the circuit from an electrical surge?
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Joule
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24.) Why is it important to have an indicate light on a surge suppressor?
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Indicates the device is protecting equipment from overvoltage's
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25.) What are the two main types of uninterruptable power supplies?
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Standby Device: Battery-powered circuit is used when AC input fails.
Inline Device: Battery-powered circuit is used continually.
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26.) How does a smart UPS differ from one that is not smart?
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The difference between a smart UPS and a nonsmart UPS is a smart UPS can be controlled
by software.
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27.) If you are asked to identify the form factor of a motherboard, what are two criteria you can
use to help you identify the board?
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Check the size, and configuration of hardware components.
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28.) What are three motherboard form factors that can be used with a compact case?
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NLX, LPX, Mini-LPX
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29.) What is one thing you can regularly do to prevent a computer system from overheating?
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Use compressed air or antistatic vacuum to remove dust from the power supply, the vents over the entire computer, and the processor heat sink.
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30.) Which type of case form factor is best designed to keep a system cool?
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ATX