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Chapter 4
A+ Comptia Chapter 4 Study Guide
33
Computer Networking
Undergraduate 1
11/05/2012

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Term
´╗┐How many pins does the P1 connector have that uses the ATX Version 2.2 standard?
Definition
24.
Term
What are the maximum dimensions for a motherboard that uses the Micro ATX form factor?
Definition
9.6" x 9.6".
Term
Which form factor is a smaller version of the Micro ATX form factor?
Definition
Flex ATX.
Term
Which form factor uses a riser card on the edge of the motherboard?
Definition
NLX.
Term
How many pins does the main power connector on a BTX motherboard have?
Definition
24.
Term
Which type of case form factor is best for keeping a system cool?
Definition
BTX.
Term
Which type of computer case is most popular for desktop systems?
Definition
Mid-tower case.
Term
What is the normal voltage of house electricity in the U.S.?
Definition
110 volts to 120 volts.
Term
normally colored _____.
Definition
Black, black.
Term
What is the difference between a transformer and a rectifier? Which are found in a PC power supply?
Definition
A rectifier is a device that converts alternating current to direct current. A transformer is a device that changes the ratio of current to voltage. A computer power supply functions as both.
Term
What are the five voltages that can be produced by an ATX or BTX power supply? Which voltage is seldom used?
Definition
+5, -5, +12, -12, and +3.3, -5.
Term
What device uses the 12V 6-pin power connector?
Definition
Video card that uses the PCI Express, Version 1 standard.
Term
What device uses the 12V 8-pin power connector?
Definition
Video card that uses the PCI Express, Version 2 standard.
Term
What is the purpose of the 4-pin auxiliary connector on a motherboard?
Definition
To provide extra voltage for a processor.
Term
What is the purpose of the 4-pin Molex connector?
Definition
Powers IDE drives.
Term
How do you determine the wattage capacity needed by a power supply?
Definition
Add up all wattage requirements for all devices that will use the power supply and then add an additional 30%.
Term
Which one component in a high-end gaming computer is likely to draw the most power?
Definition
Video card.
Term
Why is a power supply dangerous even after the power is disconnected?
Definition
Capacitors inside a PC power supply create the even flow of current needed by the PC.
Term
Which tool of a PC support technician is the most important tool to protect the system against ESD?
Definition
Ground bracelet.
Term
Which permanently damages a computer component, damage caused by ESD or damage caused by EMI?
Definition
ESD.
Term
What is a simple way to detect EMI?
Definition
On an inexpensive AM radio, turn the tuning dial away from a station into a low-frequency range. With the radio on, you can hear the static produced by EMI. Try putting the radio next to several electronic devices to detect the EMI they emit.
Term
What is an unintended, high-current, closed connection between two points in a circuit called?
Definition
A short, or short circuit.
Term
What device protects a system against lighting strikes but does not protect against sags and brownouts?
Definition
Surge protector.
Term
What device protects a system against blackouts?
Definition
UPS.
Term
What two measurements are used to rate the capacity of a UPS?
Definition
VA and watts.
Term
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?
Definition
Joule.
Term
Why is it important to have an indicate light on a surge suppressor?
Definition
So you can tell when the surge suppressor is no longer providing protection against a power surge.
Term
.What are the two main types of uninterruptible power supplies?
Definition
Standby and inline.
Term
How does a smart UPS differ from one that is not smart?
Definition
A smart UPS can be controlled by software from a computer to allow additional functionality.
Term
What is the purpose of a POST diagnostic card?
Definition
To report errors at POST.
Term
When taking a computer apart, why is it important to not stack boards on top of each other?
Definition
You could accidentally dislodge a chip.
Term
When assembling a system, which do you install first, the drives or the motherboard?
Definition
Drives.
Term
List four computer symptoms that indicate a faulty power supply.
Definition
Possible answers:
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