2.6.3 Practice Questions
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Jan 9, 2024
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Question 1:
Correct
You are an IT technician for your company. One of the employees has a computer
that continually reboots when it's powered on. He has asked you to fix it. You suspect
that the power supply may be failing.
Which of the following is the BEST initial step to determine whether the power supply
is causing the reboots?
Correct Answer:
Use a multimeter to test the power supply.
Explanation
A failing power supply can cause the computer to continuously reboot. For example,
pin 8 on the power supply connector connects to the power wire on the motherboard.
If power disappears from that wire, the motherboard shuts down. If power quickly
reappears on that wire, the system may attempt to come back on by itself, which
causes the symptom of continual reboots.
Using a multimeter allows you to verify the amount of voltage supplied by the power
supply.
You could replace the power supply, but it is best to test the original power supply
first, as other issues may be causing the reboots.
A running fan is not a good indication of a properly functioning power supply since
the fan may be running, but the power supply may not be supplying the correct
voltage for other components to run properly.
Some BIOSs may have a POST beep code that can give you a clue about a failing
power supply, but this is not a reliable method for determining that the power supply
is bad and needs to be replaced, and you may not have spare power supplies on
hand to use.
Question 2:
Correct
You are removing screws within a computer, but several have fallen into places you
can't reach. Which tool would help retrieve the small screws?
Correct Answer:
Extension magnet
Explanation
An extension magnet is a small magnet on a collapsible rod that's used to retrieve
screws that have fallen into a computer case or other areas you cannot reach.
A punch down tool is used to secure cable wiring to a punch-down block or a patch
panel, not to retrieve screws that have fallen into a computer case or other areas you
cannot reach.
Unless the lost parts are in an easily accessible location, a combination
ratchet/screwdriver would be unlikely to help you retrieve the screws.
A network tap is used to collect data on traffic traveling across a network, not for
retrieval of hardware parts.
Question 3:
Correct
Which tool would be the BEST choice for securing cable wiring to a patch panel?
Answer
Extension magnet
Combination ratchet/screwdriver
Correct Answer:
Punch down tool
Network tap
Explanation
A punch down tool is used to secure cable wiring to a punch-down block or a patch
panel, not to retrieve screws that have fallen into a computer case or other areas you
cannot reach.
An extension magnet is a small magnet on a collapsible rod that's used to retrieve
screws that have fallen into a computer case or other areas you cannot reach.
A combination ratchet/screwdriver is not designed to secure cable wiring to a patch
panel.
A network tap is used to collect data on traffic traveling across a network, not for
retrieval of hardware parts.
References
2.1.2 Safety Measures
2.1.5 ESD Facts
2.6.2 PC and Networking Tools Facts
q_tool_fct_ic_extractor_pp7.question.fex
Question 4:
Incorrect
You work in the computer repair department of a large retail outlet. A customer
comes in with a workstation that randomly shuts down. You suspect that the power
supply is failing.
What should you do first to troubleshoot the issue?
Answer
Use a cable tester to check the power supply's connections.
Correct Answer:
Use a known good spare to swap with the existing power supply.
Incorrect answer:
Use a power supply tester on the power supply.
Use a multimeter to test the power supply's electrical properties.
Explanation
Known good spares are sets of components that you know are in proper functioning
order. If you suspect a problem with a component, first try to swap it with a known
good component. If the problem is not resolved, you can then continue
troubleshooting other possible issues.
A power supply tester is a custom multimeter used to test output from a PC power
supply. The power supply tester has multiple connectors to test the output for each
connector type. However, in this case, intermittent shutdowns are a common
symptom of a failing power supply.
While using a multimeter can test various electrical properties of the power supply,
the first step should be to simply swap the current power supply with a known good
spare to verify that the existing power supply is the cause of intermittent shutdowns.
A cable tester verifies that a network can carry a signal from one end to the other
and that all wires within the connector are in the correct positions. This tool is not
used to test power supply connections.
References
2.6.2 PC and Networking Tools Facts
3.4.1 Motherboard Troubleshooting
3.4.2 Motherboard Troubleshooting Facts
3.10.2 Processor Troubleshooting Facts
3.14.2 Power Supply Facts
q_tool_fct_known_good_spare_pp7.question.fex
Question 5:
Correct
A printer is behaving erratically; you suspect a faulty parallel port. Which tool can you
use to test the parallel port?
Answer
Multimeter
Ammeter
Correct Answer:
Loopback plug
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Cable tester
Explanation
A loopback plug allows an output signal to be returned as input. Loopback plugs are
used to test serial and parallel ports.
A cable tester verifies that a network can carry a signal from one end to the other
and that all wires within the connector are in their correct positions.
A multimeter measures electrical properties, such as voltage, amps, and resistance.
An ammeter is an instrument that measures the flow of electric current in a circuit.
References
2.6.1 PC and Networking Tools
2.6.2 PC and Networking Tools Facts
q_tool_fct_loopback_plugs_test_pp7.question.fex
Question 6:
Correct
You suspect that the power supply in your desktop PC is failing. You want to use a
multimeter to test the power supply. Which multimeter setting should you use?
Answer
AC volts
Ohms
Watts
Correct Answer:
DC volts
Explanation
To measure a power supply's output, use DC voltage. A power supply converts AC
voltage to DC voltage and supplies the DC power to computer components.
An ohm is a measure of resistance used to check the properties of a resistor.
AC is the voltage input for a power supply. To measure the input, measure the power
from the wall socket.
Multimeters can measure amps but do not measure watts.
References
2.6.2 PC and Networking Tools Facts
3.4.1 Motherboard Troubleshooting
3.4.2 Motherboard Troubleshooting Facts
3.10.2 Processor Troubleshooting Facts
3.14.2 Power Supply Facts
q_tool_fct_multimeter_setting_pp7.question.fex
Question 7:
Correct
A technician is troubleshooting a computer that doesn't start up correctly.
Which of the following could the technician use to troubleshoot the computer?
Answer
Correct Answer:
Known good spares
Tone generator and probe
3-prong parts retriever
Loopback plug
Explanation
Known good spares are sets of components that you know are in proper functioning
order, such as a power supply or an expansion card. In this scenario, swapping the
current power supply with a known good part would be a good method for
troubleshooting the computer.
A 3-prong parts retriever is used to grasp and retrieve small parts that have fallen
into areas that are difficult to reach.
A tone generator and probe are used to trace a wire from one location to another,
especially through the walls of a building.
A loopback plug is used to test network communications by redirecting a signal from
the transmit port on a device to the receive port on the same device.
References
2.6.2 PC and Networking Tools Facts
3.4.1 Motherboard Troubleshooting
3.4.2 Motherboard Troubleshooting Facts
3.10.2 Processor Troubleshooting Facts
3.14.2 Power Supply Facts
q_tool_fct_network_tools_trblshoot_pp7.question.fex
Question 8:
Correct
A maintenance worker accidently nicks a bundle of network cables routed to multiple
wall jacks in a conference room. Only one of the cable's wires are severed. A
technician is tasked with replacing the cable.
Which of the following tools would the technician MOST likely use to identify which
wall jack connects to the severed cable?
Answer
Multimeter
Loopback plug
Cable stripper
Correct Answer:
Tone generator and probe
Explanation
A tone generator and probe can be used to identify the wall jack connected to the
severed wire. The tone generator can be attached to the severed wire, and the probe
will sound when it is brought close to the connected wall jack.
A multimeter measures voltage, current, and resistance on a wire.
A loopback plug can be plugged into a network adapter to test whether the NIC can
send and receive properly.
A cable stripper is used to cut away the plastic jacket or coating from a network
cable.
References
2.6.1 PC and Networking Tools
2.6.2 PC and Networking Tools Facts
q_tool_fct_network_tools_wall_jack_pp7.question.fex
Question 9:
Incorrect
You need to trace the route that a Cat 6 UTP cable takes through the ceiling and
walls of your building. Which tool should you use?
Answer
Incorrect answer:
Cable tester
Correct Answer:
Tone generator
Multimeter
Loopback plug
Explanation
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Use a tone generator to trace a UTP cable through walls and ceilings. A tone
generator is attached to one end of the cable and the probe audibly traces the wire.
A cable tester tests UTP cables for continuity and resistance.
A multimeter is used to measure electrical voltage and resistance.
A loopback plug is used to test network communications by redirecting a signal from
the transmit port on a device to the receive port on the same device.
References
2.6.1 PC and Networking Tools
2.6.2 PC and Networking Tools Facts
q_tool_fct_tone_probe_pp7.question.fex
Question 10:
Incorrect
Your workstation is unable to communicate with any other computer on the network.
Which of the following tools should you use to test the network card's abilities to
send and receive signals?
Answer
Incorrect answer:
ping
command
Correct Answer:
Loopback plug
Multimeter
Cable tester
Explanation
Use a loopback plug to test the network card's ability to send and receive signals.
A cable tester tests the continuity of all the wires in a cable and ensures that wires
are connected appropriately in the plugs.
Pinging the local host (ping 127.0.0.1) tests the TCP/IP protocol stack but does not
actually send signals out the network card.
Use a multimeter and an ohmmeter to test the electrical properties of cables and
signals.
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