3.2.6 Practice Questions

You are trying to troubleshoot a desktop power supply issue using a voltmeter. Which of the following options are the MOST common voltages produced by the power supply? (Select TWO). +/- 5 v +/- 10 v +/- 12 v +/- 110 v +/- 120 v

+/- 5 v +/- 12 v

You have a laptop with a dual-core processor that has the following characteristics: 1024 KB 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? 512 KB L2 cache 32nm process size Single-core processor 90 Watts

90 Watts

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 describes a valid type of power supply? A single-rail power supply provides one rail (PCB trace). This provides the best safety for the computer by providing a single point of shutdown in the event of a short circuit. A single-rail power supply provides one rail (PCB trace) used to always provide equal wattage to all devices attached to the power supply. 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. A dual-rail power supply provides separate rails (PCB traces) used to provide equal wattage to the devices attached to each rail.

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.

You need to replace the power supply in your home desktop computer. As you choose the replacement power supply, which of the following specifications are the MOST likely to affect your choice? (Select THREE). Input voltage Form factor Output voltage Processor connector Output wattage Output frequency Input frequency

Form factor Processor connector Output wattage

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? (Select THREE). Input voltage Form factor Output voltage Type and number of connectors Output wattage

Form factor Type and number of connectors Output wattage

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? Edit the BIOS and modify the voltage input setting. Purchase a new power supply that is compatible with 230 VAC. Purchase a voltage converter and plug your computer into the converter box. Inspect the power supply unit for a manual voltage switch and move it to 230 VAC otherwise no action is necessary.

Inspect the power supply unit for a manual voltage switch and move it to 230 VAC otherwise no action is necessary.

An employee submitted a support ticket stating that her computer will not turn on. Which of the following troubleshooting steps should you take first? (Select TWO). Make sure the power cord is plugged into the wall. Make sure the keyboard and mouse are plugged in. Use a multimeter to test the power supply. Open the computer and replace the power supply. Make sure the surge protector is turned on.

Make sure the power cord is plugged into the wall. Make sure the surge protector is turned on.

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? Replace the power supply. Switch the voltage selector on the back from 220 VAC to 110 VAC. Disconnect all devices drawing power from the power supply before testing it. Nothing. The power supply is working normally.

Nothing. The power supply is working normally.

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? Keep using the power supply, but stop using that particular Molex connector. Switch the voltage selector on the back of the power supply to 230 volts AC. Replace the power supply because it is failing. Continue using the power supply until the voltage on the yellow wire drops to less than 9 volts.

Replace the power supply because it is failing.

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? Nothing. The power supply is working normally. Switch the voltage selector on the back from 220 VAC to 110 VAC. Disconnect all devices drawing power from the power supply before testing it. Replace the power supply.

Replace the power supply.

Which of the following statements are true regarding power supply wattage? (Select TWO). A system's wattage requirement equals the highest wattage requirement for a single individual circuit. The lower the wattage rating, the more amps a power supply can deliver. The wattage requirement for each individual circuit uses formula W = V x A. A system's wattage requirement does not depend on the amount of devices in the system. The watt rating indicates how much power can be supplied to various devices.

The wattage requirement for each individual circuit uses formula W = V x A. The watt rating indicates how much power can be supplied to various devices.

You have a desktop computer that uses a 250-watt power supply. You recently added a four-disk RAID 10 array to the system, and now it spontaneously shuts down. Which of the following would MOST likely rectify this issue? Upgrade to a power supply that provides more watts. Use the switch on the power supply to switch from 115 VAC to 230 VAC. Upgrade to smaller capacity hard drives. Upgrade to a power supply that provides more volts.

Upgrade to a power supply that provides more watts.

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 have an 8-pin PCIe power connector. Which solution would be the least expensive option for your system? Purchase a new power supply with the necessary connector. Use an adapter cable to connect two 4-pin Molex connectors to the 8-pin PCIe connector. Purchase a new video card that does not require a power connector. Connect the 8-pin processor cable to the video card.

Use an adapter cable to connect two 4-pin Molex connectors to the 8-pin PCIe connector.

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? Resistance rating DC voltage rating AC voltage rating Watt rating

Watt rating