Chapter 2

Which of the following voltages are provided by an ATX power supply?

3.3 5 12

Sometimes a board may have an extra PCIe power connector. This connector comes in what two different pin numbers?

8-pin 6-pin

Which of the following functions does an ATX power supply perform?

Aids in thermal management Converts AC to DC

You are building a new computer. You want to select a power supply with features that can help prevent circuit overloads by balancing the current flow. What is the BEST option?

Dual-rail

you clip it to the side of the computer case to dissipate any charge between you and the computer

ESD strap

A system always needs the 4-pin auxiliary power connector, and sometimes needs the P1 connector as well.

False

Immediately after you unplug the computer from the power outlet, you're safe to begin working inside the case.

False

When disassembling a computer, it's okay to stack circuit boards on top of each other as long as you follow ESD protection rules.

False

What should be done after reassembling a laptop, but before installing the battery or AC adapter?

Gently shake the laptop to ensure nothing is loose inside of the case

controls the drive activity light on the front panel that lights up when any SATA or IDE device is in use

HDD LED

Which component may be considered a field replaceable unit (FRU)?

LCD screen hard drive power supply

An employee submitted a support ticket stating that her computer will not turn on. Which of the following troubleshooting steps should you take first?

Make sure the power cord is plugged into the wall. Make sure the surge protector is turned on.

You are testing the power supply in a PC system by measuring the voltage available on the 4-pin Molex connector. The voltage on the red wire is +5.1 volts. What should you do?

Nothing, the power supply is working normally

You need to replace the power supply in your home desktop computer. As you choose the replacement power supply, which of the following specifications are the most likely to affect your choice? (choose three)

Output wattage Form factor Processor connector

A system will always require what power connector?

P1 power connector

Which of the following devices uses the 4-pin peripheral (Molex) connector?

PATA CD-ROM Case fan

positive / negative LED that controls the power light and indicates the power is on

Power LED +/-

What controls power to the motherboard, must be connected to power the PC up?

Power SW

Which of the following converts AC to DC?

Power supply

You are servicing a client's computer that has been randomly restarting. You decide to test the power supply using a multimeter. You connect the positive lead to the yellow wire on one of the Molex connectors. Which action should you take based on the multimeter reading 10.24?

Replace the power supply because it is falling

switch used to reboot a computer

Reset SW

What type of connector is not typically found on the front panel header?

SATA controller

What are two resources that may be useful in disassembling a laptop computer?

Service manual User manual

When removing screws while working on a laptop, what should be done with the screws?

They should be stored or labeled

Your company relocated you to their United Kingdom office in London. You brought your personal computer with you and are in the process of setting it up. Your computer was previously configured to receive 110 V AC, but the electricity in London uses 230 V AC. Which of the following would allow your computer to run on 230 V AC?

Toggle the voltage switch on the power supply to different voltage.

If a ground strap is unavailable, what should be done to dissipate any ESD before working on a laptop?

Touch a non-painted metallic surface on the laptop

Some boards designed to support multiple PCIe video cards will have additional power connectors on the board to power wattage-hungry cards.

True

The motherboard sits on elevated screw holes or spacers to keep it from touching the case.

True

You need to replace the power supply in your desktop. Which of the following specifications are the most likely to affect your power supply choice? (choose three)

Type and number of connectors Form factor Output wattage

You have a desktop computer that uses a 250-Watt power supply. You recently added a 4-disk RAID10 array to the system and now it spontaneously shuts down. What should you do?

Upgrade to a power supply that provides more watts

You are building a new computer from both new and used parts. The video card is a PCIe video card that requires an 8-pin power connector. However, your power supply doesn't haven an 8-pin PCIe power connector. Which solution would be the least expensive option for your system?

Use an adapter cable to connect two 4-pin Molex connectors to the 8-pin PCIe connector.

You have a desktop that you want to upgrade. You add several internal components and external components. You realize that you need to ensure that your power supply can support all of the new devices. Which of the following power supply rating BEST describes the rating used to determine this?

Watt rating

When is it okay to touch the inside of a computer that is turned on?

When using a multimeter to measure voltage output

What is the very first step that should be taken when performing work with a computer?

You should back up any important data

When handling motherboards, cards, or drives, which statement is NOT accurate?

You should not hold expansion cards by the edges

a type of connector that must be lifted up in order to be disconnected

ZIF connector

Which statement is true regarding the installation of the motherboard and connecting power?

a 4-pin power cord supplies supplemental power to the processor

You have a motherboard that uses a 24-pin ATX connector. Which types of power supply could you use with this motherboard?

a power supply with a 20-pin ATX and a +4-pin connector a power supply with a 24-pin ATX connector only

Which statement is NOT a good practice when working inside a computer case?

be sure to hold expansion cards by the edge connectors

Where should you clip your ESD strap when opening a computer case?

computer case

a connector on the motherboard that allows the insertion of a card

expansion slot

a connector on a motherboard that consists of pins that stick up from the board

front panel header

What do you call a connector on a motherboard that consists of pins that stick up from the board?

header

What two devices in a computer should be considered "black boxes", and should never be opened, due to risks involving charged capacitors?

monitor power supply

What is the second step in opening the case of a working computer?

power down the system and unplug it

a document from the manufacturer that describes how to disassemble a device

service manual

keeps the motherboard from touching the case

spacer

What are round plastic or metal pegs that separate the motherboard from the bottom of the case known as?

standoff

What does a small triangle embedded on a connector signify?

the wire nearest the triangle is pin 1