A computer's power supply converts mains AC to low-voltage regulated DC power for the internal components of a computer. You are building a new computer. You are deciding which type of power supply to install.
Which of the following definitions BEST describe a valid type of power supply?
answer
A dual-rail power supply provides separate rails (PCB traces) used to balance the power load between multiple circuits, which prevents any one circuit from becoming overloaded. Explanation: A) A power supply that provides the correct voltage and amperage to the computer components.B) A power supply that provides the correct voltage to the computer components.C) A power supply that provides the correct amperage to the computer components.A) A power supply that provides the correct voltage and amperage to the computer components.This is the best definition of a valid type of power supply. A power supply must provide the correct voltage and amperage to the computer components in order for the components to function properly.
question
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?
answer
Use an adapter cable to connect two 4-pin Molex connectors to the 8-pin PCIe connector.
question
Which of the following statements are true regarding power supply wattage?
answer
1. The wattage requirement for each individual circuit uses formula W = V x A
2. The watt rating indicates how much power can be supplied to various devices.
question
Your company relocated you from the United States 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 115 VAC, but the electricity in London uses 230 VAC.
Which of the following would allow your computer to run on 230 VAC?
answer
Toggle the voltage switch on the power supply to the different voltage.
question
You need to replace the power supply in your home desktop computer. Which of the following specifications are the most likely to affect your power supply choice?
answer
1. Form factor
2. Output wattage
3. Type and number of connectors
question
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 of the following BEST describes the action you should take based on the multimeter reading shown below?
MULTIMETER READS: 10.24 volts
answer
Replace the power supply because it is failing.
question
An employee submitted a support ticket stating that her computer will not turn on.
Which of the following troubleshooting steps should you take first?
answer
1. Make sure the power cord is plugged into the wall.
2. Make sure the surge protector is turned on. Explanation: First, you should check to make sure that the computer is plugged into an outlet and that the power cord is firmly inserted into the computer. If the computer is plugged in and still will not turn on, you should check to see if the outlet is working by plugging in another device. If the outlet is not working, you should contact your building maintenance staff. If the outlet is working, you should check to see if the computer's power button is stuck or if the computer is unresponsive to button presses. If the power button is stuck, you should try to unstick it. If the computer is unresponsive to button presses, you should try holding down the power button for a few seconds to see if the computer will turn on. If the computer still will not turn on, you should contact the IT support staff.
question
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?
answer
Nothing. The power supply is working normally.
question
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 yellow wire is +10.1 volts. What should you do?
answer
Replace the power supply.
question
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?
answer
Upgrade to a power supply that provides more watts.
question
You need to replace the power supply in your desktop. As you choose the replacement power supply, which of the following specifications are the most likely to affect your choice? (choose three)
answer
1. Processor connector
2. Form factor
3. Output wattage
question
You are trying to troubleshoot a power supply issue with a voltmeter. Which of the following options are common voltages produced by a desktop power supply? (select two)
answer
1. +/- 12v
2. +/- 5v Explanation: The most common voltages produced by a desktop power supply are 12 volts and 5 volts. These voltages are used to power the various components of the computer, such as the CPU, motherboard, and disk drives.
question
You have a laptop with a dual core processor with the following characteristics:
* 1024 MB L2 cache
* 125 Watts
* 45nm process size
You want to upgrade the processor to one that uses less power. Which of the following characteristics would most likely identify a processor that uses less power?
answer
90 watts Explanation: A processor that uses less power would likely have a smaller L2 cache, a lower wattage, and a smaller process size.
question
You have a desktop computer 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 ratings BEST describes the rating used to determine this?
answer
Watt rating Explanation: The power supply rating that would be used to determine if the power supply can support all of the new devices is the maximum wattage rating. This is the highest amount of power that the power supply can output and is typically listed on the power supply itself.
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