Chapter 5: Supporting the Power System and Troubleshooting Computers
To know what size power supply you need, add up the wattage requirements of all components and add how much more?
30%
When calculating your power requirements the power supply should be rated ____ higher than your expected needs.
30%
when calculating the wattage for a power supply by estimating its needs, how much wattage would you allow for a fan?
5W
A user complains of a dead laptop battery. You want to check that the system is operational. You get his AC adapter and plug it in to the wall socket and then the PC. It doesn't boot. You remove the battery and the laptop boots. Your diagnosis?
bad battery
The bottom of a CPU cooler is shown in this image. Why would copper be used here over the more widely seen aluminum?
better heat conductor
For which processor does Intel recommend using a liquid cooling system?
LGA2011
Intel recommends a liquid cooling system for processors that use which Intel socket, which is typically used on high-end gaming computers?
LGA2011
During the boot process, what are error messages printed on a black screen likely caused by?
POST error
Battery packs today use which of the following technologies?
lithium ion
You want to run the Windows memory Diagnostic from a Command Prompt. What command would you type?
msched
You just purchased a CPU upgrade retail box set. This is a way for the manufacturer to guarantee that the fan and CPU are paired efficiently. When you examine the parts you see the ATX12V1 motherboard connector is white. the connector on your CPU is black. They have the same configuration otherwise. Is this a problem?
no
When you looked at the power cable connection point and On/Off switch on the back of the unit, what was different?
no voltage selector
Some laptops contain a second battery. What is this battery called?
sheet battery
Which device in the computer case uses the least amount of wattage?
case fan
Which of the following is a round air duct that helps to pull and direct fresh air from outside the case to the cooler and processor?
chassis air guide
A cooler made of which of the following will do the best job of conducting heat?
copper
When considering the metals used in your processor cooler, which is the best overall choice?
copper with aluminum fins
Why would a network administrator implement vulnerability scanning on a network?
to reveal vulnerabilities in the network
Which part of a toner and probe kit emits an audible tone when it detects electrical activity on a wire pair?
tone locator
Which of the choices provided would best utilize the slim design of the cooler in this image?
video card
Suppose you're creating patch cables to be used in a government office. What color wire goes in the first pin?
white/green
Looking at the motherboard in this image, you see the SYS_FAN connector. Will the connector support a 4 pin connector?
yes
The cooler in this image would be best suited as a _________fan.
(Zalman) processor
the cooler in this image would be best suited as a __________ fan.
(dynex blue) case
The cooler in this image would be best suited as a ______ fan.
(red fan) chipset
since you've determined that the power supply is a 700W dual rail, what does that make the maximum output power?
700
Good processor coolers maintain a temperature of what range?
90 -110 degrees
You will see two types of fan headers for motherboards. There are 4-pin connector and 3-pin connector designs. Either will work, so what does the extra wire control?
Speed
You have been experiencing connectivity with various websites. The response time to open these websites is high. You tested the same websites from your home and could open them much faster. You assume that the slow access to the Websites might be due to high latency. Which of the given utility is likely to help you in finding the source that may be causing the latency issue?
Traceroute
A short might occur if some component on the motherboard makes improper contact with the chassis. What is the most likely cause of this improper contact?
missing standoff
Which would be the LEAST likely application for the heat sink in this image?
processor
The cooler in this image would be best suited as a ______ fan.
processor (intel)
When the processor overheats and the system restarts, what type of error has occurred?
processor thermal trip errors
What term is used to describe each circuit provided by the power supply?
rail
You are working on a system that is displaying intermittent signs of a power problem. When you check the system there is no air blowing out of the power supply. What do you do?
get a new power supply
When troubleshooting, a clicking noise might indicate which of the following?
hard drive is failing
What is the main obstacle to using passive heat sinks?
size
To troubleshoot a network problem, you are required to use a packet analyzer on a Unix based system. Which of the following command line interface commands will provide you with the required functionality?
tcpdump
What type of fiber cable problem is caused when pairing a 50-micron core cable with a 62.5-micron core cable?
Fiber type mismatch
What Windows utility can you use to test RAM?
Memory Diagnostics
Which of these categories of twisted-pair cable can support Gigabit Ethernet?
Cat 5e, Cat 6a, Cat 7
What is the earliest twisted-pair cabling standard that meets the minimum requirements for 10GBase-T transmissions?
Cat 6a
What kind of cable uses BNC connectors? Which connector is likely to be used by cable TV?
Coaxial cable, F-connector
How many beeps does startup UEFI/BIOS give to indicate a successful POST?
1 beep
Your CPU fan operates on which voltage?
+12V
You are checking a Molex drive power connector. In addition to the +12V what other voltage should be present?
+5V
Your system crashes displaying a blue screen and a long error number. What is the common term for this condition?
BSOD
Which fiber connector contains two strands of fiber in each ferrule?
MTRJ (Mechanical Transfer-Registered Jack)
Which kind of crosstalk occurs between wire pairs near the source of the signal?
NEXT
If you need to perform port scanning in your network, which of the following tool are you likely to use? [Choose all that apply].
Superscan Angry IP Scanner
What common household element can, over time, reduce airflow, insulate components, reduce heat exchange or even cause the system to hang or reboot?
dust
You have just upgraded your case fan. When installing it you notice that the old fan used 3 pins and that your new one has 4 pins. this isnt a problem because the intended fan header has four pins. What is the extra pin for?
fan control
What is another term for a passive heat sink?
fanless
What option should be selected on a voltage selector for a power supply being used in the United States?
115V
If one of the 12V rails required 150 and the second needed 350, how much wattage would the first rail get? in the space provided, enter only the numeric value
150
What is the approximate wattage rating of a motherboard, processor, memory, keyboard, and mouse?
200-300 watts
You are asked to perform an analysis on the network that will allow you to deduce information from patterns in communication. Which of the following types of analysis are you asked to perform?
Data traffic analysis
The CPU cooler in this image uses several methods of heat dissipation. What are they? select the best answer from the choices provided.
all these choices are correct (heat pipes, fan, fins, copper)
Which transmission characteristic is never fully achieved?
bandwidth
What type of cooler contains pipes filled with liquid that helps draw heat away from the CPU toward the fins on the cooler?
passive CPU cooler
How many pins does the CPU fan header on a motherboard have?
4 pins
Which kind of multiplexing assigns slots to nodes according to priority and need?
STDM (statistical time division multiplexing)
Active coolers require power for the fan. In most cases this is supplied by a motherboard component called a ___________.
header
What is the first step in the six-step model for computer troubleshooting?
interview the user
You have noticed over the past two days your phone is running hot. It's always on but never got hot before. What should you do first?
shut down then restart the phone