How much power is consumed by a load drawing 5 A with 120 V across it?
answer
600 W Explanation: The power consumed by a load drawing 5 A with 120 V across it is 600 watts.
question
What is a reasonable wattage capacity for a power supply to be used with a system that contains a DVD drive, three hard drives, and a high-end video card?
answer
C. 700 W Explanation: The wattage capacity for a power supply to be used with a system that contains a DVD drive, three hard drives, and a high-end video card should be at least 1000 watts.
question
You upgrade a faulty PCIe video card to a recently released higher-performing card. Now the user complains that Windows 10 hangs a lot and gives errors. Which is the most likely source of the problem? Which is the least likely source?
answer
Most likey: A. A component of the computer is overheating.
Least likely: D. Memory is faulty.
question
What should you immediately do if you turn on a computer and smell smoke or a burning odor?
answer
A. Unplug the computer. Explanation: If you turn on a computer and smell smoke or a burning odor, you should immediately unplug the computer and call a professional to fix it.
question
When you boot up a computer and hear a single beep, but the screen is blank, what can you assume is the source of the problem?
answer
B. The monitor or monitor cable. Explanation: There are a few potential causes for this problem. One possibility is that the monitor is not receiving a signal from the computer. This can be caused by a loose connection between the monitor and the computer, or by a problem with the video card. Another possibility is that the computer is not booting up properly. This can be caused by a variety of issues, including a bad power supply, a faulty motherboard, or a problem with the BIOS.
question
You suspect that a power supply is faulty, but you use a power supply tester to measure its voltage output and find it to be acceptable. Why is it still possible that the power supply may be faulty?
answer
A power supply test will only tell you if it is bad.
question
Someone asks you for help with a computer that hangs at odd times. You turn it on and work for about 15 minutes, and then the computer freezes and powers down. What do you do first?
answer
C. Wait about 30 minutes for the system to cool down and try again. Explanation: The first thing you would want to do is to check for any loose cables that may be causing the issue. If everything appears to be plugged in correctly, you would then want to restart the computer and see if the problem persists. If the problem does persist, you would want to run a diagnostic on the computer to see if there are any hardware issues that could be causing the problem.
question
You own a small computer repair company and a customer comes to you with a laptop that will not boot. After investigating, you discover the hard drive has crashed. What should you do first?
answer
B. Ask the customer's advice about the size of the drive to install, but select a drive that's the same speed as the original drive.
question
You have repaired a broken LCD panel in a laptop computer. However, when you disassembled the laptop, you bent the hinge on the lid so that it now does not latch solidly. When the customer receives the laptop, he notices the bent hinge and begins shouting at you. What do you do first? Second?
answer
B. Listen carefully to the customer and don't get defensive.
C. Apologize and offer to replace the bent hinge.
question
As a help-desk technician, list four good detective questions to ask if a user calls to say, "My computer won't boot."
answer
1. What error messages, unusual displays, or failures did you see?
2. When did the problem start?
3. Does the system have a history of similar problems?
4. What was the situation when the problem occured? Explanation: If a user calls to say that their computer won't boot, there are four good detective questions to ask:1. What exactly is happening? Is the computer not turning on at all, or is it getting stuck at a certain point in the boot process?2. Have you tried any troubleshooting steps yourself?3. When was the last time the computer was working properly?4. What has changed since then?
question
If the power connector from the CPU fan has only three pins, it can still connect to the 4-pin header, but what functionality is lost?
answer
Fan will always operate at the same speed. Explanation:If a user calls to say that their computer won't boot, there are four good detective questions to ask:1. What exactly is happening? Is the computer not turning on at all, or is it getting stuck at a certain point in the boot process?2. Have you tried any troubleshooting steps yourself?3. When was the last time the computer was working properly?4. What has changed since then?
question
How do you determine the wattage capacity needed by a power supply?
answer
Add wattage requirements of all components and add 30%. Explanation: The wattage capacity needed by a power supply can be determined by calculating the power draw of all the components in the system. The total power draw of the system should be less than the wattage capacity of the power supply.
question
You've decided to build a new gaming computer and are researching which power supply to buy. Which component in a high-end gaming computer is likely to draw the most power? What factor in a power supply do you need to consider to make sure this component has strong enough wattage?
answer
Video card. The +12V rail. Explanation: The graphics processing unit (GPU) in a high-end gaming computer is likely to draw the most power. The factor in a power supply that you need to consider to make sure the GPU has strong enough wattage is the maximum power output (in watts).
question
Your friend Suzy calls to ask for help with her computer. She says when she first turns on the computer, she doesn't hear a spinning drive or fan or see indicator lights, and the monitor is blank. Is the problem hardware- or software related?
answer
Hardware related Explanation: The problem is most likely hardware-related. If the computer doesn't turn on at all, it's probably a problem with the power supply, the motherboard, or the CPU. If the computer turns on but the monitor is blank, it's probably a problem with the video card or the monitor.
question
Which two components in a system might make a loud whining noise when there is a problem? Why?
answer
Power supply or failing hard drive. Might be a short or the power supply is going bad or is underrated for the system. Explanation: There could be a problem with the fan or the power supply. If the fan is not working properly, it can cause the system to overheat and make a loud whining noise. If the power supply is not working properly, it can cause the system to overheat and make a loud whining noise.
question
Your boss assigns you a trouble ticket that says a computer is randomly shutting off after about 15 minutes of use. You have a theory that the computer is overheating. What utility program can you use to read system temperatures?
answer
BIOS/UEFI Explanation: The utility program that can be used to read system temperatures is called the System Information tool. This tool can be found in the Windows Control Panel. Once you open the System Information tool, you will be able to see the current temperature of your computer.
question
What are two reasons to tie cables up and out of the way inside a computer case?
answer
To keep proper airflow and prevent cabled from getting in the way of turning fans. Explanation: The two main reasons to tie cables up and out of the way inside a computer case are to improve airflow and to prevent damage to the cables. Poor airflow inside a computer case can lead to heat build-up, which can damage components or cause the computer to overheat. Cables that are left dangling inside a computer case are also more likely to be damaged by moving components or by being caught on something when the case is moved.
question
You suspect a component in a computer is fried. You remove any unnecessary hardware devices one by one to narrow down where the problem exists. Which step in the troubleshooting process is this?
answer
Examine the system. Explanation: This step is known as the process of elimination. By removing unnecessary hardware devices one by one, you are able to narrow down where the problem exists. This can be a time-consuming process, but it is often the best way to troubleshoot a problem with a computer.
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