chapter 4 questions april

Chapter 4 Questions

April, James, Nickie, & Alex

1- 7 Questions

April

1. Volts are a measure of what characteristic

of electricity?

Answer:

electrical "pressure" differential

2. What is the normal voltage of house

electricity in the United States?

Answer:

120 V

3. Hot wires in home wiring are normally colored _____

and ground wires in computers are normally

colored ______.

Answer:

Black, Black

4. What is the difference between a transformer and a rectifier? Which are found

in a PC power supply?

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.

5. What are the five voltages produced by an ATX or BTX power

supply?

Answer:

+12V, -12V, +5V, -5V, +3.3V

6. What is the purpose of the 4-pin auxiliary

connector on a motherboard?

Answer:

To provide an additional 12V power supply to the processor.

7. How many pins does the main power connector on a BTX

board have?

Answer:

24-pins

8-14 Questions

James Harris

8

• What form factor for the case and power supply does a NLK motherboard use?

Answer

•ATX

9

• Describe the purpose of the ground line in a house circuit. What is the electrical symbol for ground?

Answer

• To prevent uncontrolled electricity from continuing to flow indefinitely

• Earth

10

• What is the basic electronic building block of integrated circuit?

Answer

• Transistor

11

• Why is a power supply dangerous even after the power is disconnected?

Answer

• Electricity is built up in a power supply and can still cause a spark

12

• What is the symbol for a diode?

Answer

13

• What is a simple way to detect EMI?

Answer

• Put a radio next to several electronic devices

14

• What is an unintended, high-current, closed connection between 2 points in a circuit called?

Answer

• Short or short cut

15 – 22 Questions

Nickie

15. Which form factor uses a riser card on the edge of the

motherboard?

LPX and Mini-LPX has a riser card

16. List 4 types of computer case form factors, What is the most popular type

of form factor for PCs today?

1.AT 2. ATX

3. MicroTX4. BTX

ATX is the most commonly used form factor today.

17.List 3 advantages an ATX system has over a Baby AT system.

1. Fewer wires 2. Easier installation

3. Components on the motherboard don’t face each

other.

18. List 4 computer symptoms that indicate a faulty power supply.

1. Hang 2. Reboot

3.Give intermittent errors4.Wont boot at all

19. According to ACPI standards, the S1 mode causes what 2 devices

to stop using power?

hard drive and monitor

20. What is another name for the ACPI standard S4 mode?

Hibernation

21. What power management standard is older then ACPI and has

mostly been replaced by ACPI?

(APM)advanced power management.

22. How can u easily tell if a computer is designed to comply

with Green Standards?

The display of the green star energy logo

23-30 Questions

Alex Coffey

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?

Joule

24.) Why is it important to have an indicate light on a surge suppressor?

Indicates the device is protecting equipment from overvoltage's

25.) What are the two main types of uninterruptable power supplies?

Standby Device: Battery-powered circuit is used when AC input fails.

Inline Device: Battery-powered circuit is used continually.

26.) How does a smart UPS differ from one that is not smart?

The difference between a smart UPS and a nonsmart UPS is a smart UPS can be controlled

by software.

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?

Check the size, and configuration of hardware components.

28.) What are three motherboard form factors that can be used with a compact case?

NLX, LPX, Mini-LPX

29.) What is one thing you can regularly do to prevent a computer system from overheating?

Use compressed air or antistatic vacuum to remove dust from the power supply, the vents over the entire computer, and the processor heat sink.

30.) Which type of case form factor is best designed to keep a system cool?

ATX