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WorksheetsBig ah study guide for exam 2
Total questions: 76
Worksheet time: 38mins
Which of the following ATX12V features was introduced as part of the EPS12V standard?
The P4 motherboard power connector
Voltage rails
The 6-pin AUX connector
Soft power
Which kind of fire extinguisher should you use for computer equipment?
Class A
Class B
Class C
Class D
Under what conditions should a PC technician work inside the power supply?
Only when it is unplugged.
Only when the technician is wearing an antistatic wrist strap.
Anytime, because the power supply only has low-energy DC electricity that will not hurt the technician.
Never, because the power supply has capacitors that hold electrical charges that may harm the technician.
What should you check first if a computer will not start and the fan in the power supply will not turn?
The voltages coming out of the power supply
The motherboard power connector
The power coming into the power supply
The power switch
When you test voltage with a multimeter, you can assume the outlet or connector is functioning properly if the reading is within a certain percentage of the expected number. What is that maximum percentage by which the reading can vary?
5 percent
10 percent
20 percent
25 percent
What voltage does an ATX12V P4 connector provide for motherboards?
3.3 V
3.3 V, 5 V
When testing an AC outlet, what voltage should the multimeter show between the neutral and ground wires?
120 V
60 V
0 V
–120 V
What sort of power connector does a traditional hard drive typically use?
Molex
Mini
Sub-mini
Micro
Arthur installed a new motherboard in his case and connected the ATX power, but his system would not turn on. He sees an extra four-wire port on the motherboard. What’s he missing?
He needs to plug in the P2 connector for powering auxiliary components.
He needs to plug in the P3 connector to power the case fans.
He needs to plug in the P4 connector to power the processor.
He needs to plug in the Aux connector to connect to a secondary power supply.
What is the effect of exceeding the wattage capabilities of a power supply by inserting too many devices?
The system will boot normally, but some of the devices will not function properly.
The system will boot normally, and all of the devices will work, but only for a limited time. After an hour or so, the system will spontaneously shut down.
The system will not boot or turn on at all.
The system will try to boot, but the overloaded power supply will fail, burning up delicate internal capacitors.
Where do you put the multimeter leads when you test a Molex connector?
The red lead should always touch the red wire; the black lead should touch a black ground wire.
The red lead should always touch the black ground wire; the black lead should always touch the red-hot wire.
The red lead should always touch the yellow hot wire; the black lead should touch the red-hot wire.
Which of the following problems points to a dying power supply?
Intermittent lock-ups at boot-up
A power supply fan that does not turn
A multimeter reading of 11 V for the 12-V power line
A computer that won’t start by shorting the soft power jumpers
What is the minimum PSU required for an ATX system that requires Molex, mini, and SATA connectors?
ATX
ATX12V 1.3
ATX12V 2.0
EPS12V
Which of the following is not a PSU form factor?
TFX12V
SFX12V
CFX12V
LPX12V
Which statement is true?
Removing the expansion slot covers on the back of your case will improve cooling by allowing hot air to escape.
Shop around when purchasing a case; you will often find good deals that include a powerful PSU.
Always keep the power supply plugged in to the wall outlet when working on the inside of a computer, as this helps to ground it.
If your power supply fails, don’t try to repair it; buy a new one.
What are the two most common voltages provided by a PC power supply?
3.3 V and 5 V
5 V and 12 V
12 V and 24 V
5 V and 9 V
A sign of a failing power supply is:
Frequent unexpected shutdowns
Fast internet speed
Bright screen display
Loud fan noise only during gaming
What does a UPS provide in addition to surge protection?
Power conditioning
Backup battery power
Voltage regulation
Overheating protection
What should you never do when cleaning the inside of a power supply?
Use compressed air to remove dust
Open the power supply case
Unplug the power cord
Wear an antistatic strap
Which connector supplies power to SATA drives?
Molex
Mini
SATA power connector
P4
What does the term "rail" refer to in a power supply?
The physical case
The metal track for screws
The individual voltage outputs
The power cord
What is the typical size (in millimeters) of a standard ATX power supply fan?
60 mm
80 mm
120 mm
200 mm
If your computer suddenly reboots when playing a game or running a benchmark, what is the most likely cause?
Insufficient RAM
The computer fails POST every time
The power light on the case blinks
The BIOS settings reset to default
What is the first step in troubleshooting a dead power supply?
Replace the PSU immediately
Test with a multimeter
Check that the system is plugged in and the switch is on
Open the power supply
Which of the following is NOT an advantage of an active PFC (power factor correction) power supply?
Cleaner power
Energy efficiency
No manual voltage switch needed
Higher power output
Which color wire on an ATX power connector provides 12 volts?
Red
Orange
Yellow
Black
What should you do before touching any internal components inside a computer case?
Remove all drives
Ground yourself to prevent ESD
Disconnect only the monitor
Wear rubber gloves
What component converts AC to DC in a computer power supply?
Capacitor
Transformer
Rectifier
Voltage regulator
Which of the following connectors provides auxiliary power to PCIe video cards?
Molex
SATA
Which tool can test a power supply’s voltage output without having to power on the system?
Multimeter
PSU tester
Loopback plug
POST card
What type of drive uses magnetic platters to store data?
SSD
HDD
NVMe
Flash drive
Which of the following has no moving parts?
Hard disk drive
Optical drive
Solid-state drive
Hybrid drive
What type of connector does a SATA data cable use?
4-pin Molex
7-pin connector
15-pin connector
40-pin connector
What is the maximum number of devices that can be attached to a single SATA controller channel?
1
2
4
8
Which storage technology uses memory chips instead of magnetic platters?
SSD
HDD
Tape
What is the primary advantage of an SSD over an HDD?
Larger capacity
Faster performance
Lower cost
Uses magnetic heads
Which RAID level offers both mirroring and striping?
RAID 0
RAID 1
RAID 5
RAID 10
What is the minimum number of drives required for RAID 5?
2
3
4
5
Which RAID level provides the best performance but no redundancy?
RAID 0
RAID 1
RAID 5
RAID 10
What does RAID stand for?
Random Access Integrated Drive
Redundant Array of Independent Disks
Reduced Access Internal Drives
Rapid Access Integrated Disks
Which type of storage device is most likely to use flash memory?
Optical disc
Hard drive
USB thumb drive
Tape backup
What does the term “hot-swappable” mean in relation to drives?
Can be inserted or removed without powering off the system
Requires system reboot after installation
Generates more heat
Needs a cooling fan
Which interface is used for modern NVMe SSDs?
SATA
M.2
IDE
PCI
Which of the following describes the purpose of the CMOS battery?
Powers the hard drive motor
Keeps BIOS settings stored when the computer is off
Powers the CPU
Maintains the operating system
What is the most common rotational speed for desktop HDDs?
4200 RPM
5400 RPM
7200 RPM
10,000 RPM
What does an optical drive use to read data?
Magnetic fields
Electrical current
Laser
Light sensor
Which optical media can typically hold the most data?
CD
DVD
Blu-ray
CD-RW
The capacity of a single-layer Blu-ray disc is:
25 GB
50 GB
4.7 GB
100 GB
What is the storage capacity of a single-layer Blu-ray disc?
4.7 GB
8.5 GB
25 GB
50 GB
Which of the following optical disc types is write-once?
CD-ROM
CD-R
CD-RW
DVD-RW
What does the acronym “BD-RE” stand for?
Blu-ray Disk – Read Edition
Blu-ray Disk – Rewriteable
Basic Disk – Recordable Edition
Blu-ray Data – Readable Edition
What is the purpose of a jumper on a PATA drive?
To control fan speed
To configure the drive as master or slave
To control read speed
To select SATA mode
What is the maximum cable length for a PATA (IDE) cable?
12 inches
24 inches
18 inches
36 inches
What is the main limitation of the FAT32 file system?
Only works on macOS
Maximum file size of 4 GB
Limited to 100 GB partitions
No journaling
Which file system is default for most modern versions of Windows?
FAT32
NTFS
What is the purpose of a partition on a hard drive?
To split the drive into separate logical sections
To increase read speed
To increase capacity
To back up data automatically
Which command in Windows is used to check and repair disk errors?
diskpart
sfc
chkdsk
defrag
Which RAID level mirrors data for fault tolerance?
RAID 0
RAID 1
RAID 5
RAID 6
Which type of connector is used by an external hard drive enclosure that supports USB 3.0?
USB Type-A
USB Type-B
USB 3.0 Micro-B
eSATA
What should you do before replacing a hard drive in a laptop?
Remove the keyboard
Disconnect power and battery
Format the drive first
Disable antivirus software
Which Windows utility can show all the drives connected to your system, including hidden partitions?
File Explorer
Device Manager
Disk Management
How many devices can a single USB host controller support?
2
4
63
127
What is the maximum USB cable length as defined by the USB 2.0 specification?
4.5 feet
4.5 meters
5 feet
5 meters
Which of the following is a high-speed alternative to existing technologies such as USB and DisplayPort?
Lightning
eSATA
USB 3.1
Thunderbolt
What do digitizers enable people to do on a PC?
Capture video
Draw, paint, and write
Secure using fingerprints
Switch between multiple computers
USB 3.2 2×2 supports which maximum speed?
480 Mbps
10 Gbps
20 Gbps
40 Gbps
When purchasing an SDXC card for a digital camera, Vera notes several performance variations such as V12, U3, and A2. What do these standards signify?
Support for video standards; sustained data transfer speeds; and IOPS, respectively
IOPS; support for video standards; and sustained speeds, respectively
What icon does Windows Device Manager display over disabled devices?
Yellow triangle
Down-pointing arrow
Blue “i”
Green “D”
Jack downloaded a video shared by a friend, ourfamilyholiday.avi. When he opens it, he hears sound but gets no picture. What’s the most likely problem and solution?
Media player doesn’t support AVI files
File needs to be played on Windows
Lacks proper video codec; install codecs
The video is corrupt
To what does the “.1” in 5.1 or 2.1 refer?
Volumetric sound positioning
Subwoofer
Subchannels
Reverb positional matrices
Which device is a biometric device?
Barcode scanner
Optical mouse
Fingerprint scanner
Flatbed scanner
John’s boss tasks him to buy SD cards for HD video projects (128 GB each). What type should he buy?
SD
SDHC
SDXC
xD
Which Blu-ray Disc format enables you to write and erase media several times?
BD-ROM
BD-R
BD-RE
Which multimedia device is used for Internet video communication with both voice and video?
Speaker
Microphone
Webcam
Sound processor
In Windows, which Control Panel applet enables you to configure a game controller or joystick?
Devices and Printers
Joysticks and Gamepads
Input Devices
Only configured within a PC game
While testing a newly installed KVM switch, you can’t display the second connected system while tapping the SCROLL LOCK key. What is most likely the problem?
Incorrect KVM UPC code
Crossed video cable
Locked SCROLL LOCK key
Active KVM
