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在PoE术语里PSU全称是Power Supply Unit，指的是供电单元，如PoE交换机的以太网接口。
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A.6VB.9VC.12VD.24V
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A lightweight access point has been connected to a Catalyst 3550 24-PWR switch， and on power-up the access point fails. What is the problem with the switch？（）A、The power supply has inadequate wattage.B、Power is incorrectly configured on the port.C、It does not support 802.3af Poe.D、Power is not enabled on the port.
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A technician receives a computer for repair and observes that the fan on the power supply is not moving. Which of the following should the technician do？ （）A、Move the power supply voltage switch to 220 volts.B、Add an additional fan to help cool the computer.C、Replace the cable that attaches the power supply to the motherboard.D、Replace the power supply.
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A technician is locked out of a desktops BIOS because of a forgotten password. Which of the following is a method of removing the password？（）A、Replace the power supply unit.B、Reseat the systems memory.C、Reset the proper jumper.D、Re-install the operating system.
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Which of the following is the MOST likely to cause a server power supply fan to fail but allows the power supply to still be functional？（）A、DustB、Power SurgeC、Excessive humidityD、High temperatures
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An administrator is troubleshooting a power supply that is believed to have failed. Which of the following tools will BEST help test the power supply？（）A、ESD EquipmentB、MultimeterC、POST CardD、Toner Probe
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Which of the following is the BEST case scenario for power fault tolerance within a server？（）A、 Redundant power supplies with one power supply connected and one power supply as a hot spare.B、 Redundant power supplies with each connected to a separate power circuit.C、 Redundant power supplies connected via a Y-cable.D、 Redundant power supplies with each connected to the same power circuit.
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A military member has just returned to the United States from Europe and reports their personaldesktop computer does not work. Which of the following is the MOST logical solution to thisproblem?（）A、The computer is unable to work in the US because of EU licensing arrangementsB、The power supply needs to be replaced with one rated for 110 wattsC、The power supply needs a power inverter to handle the change in cyclesD、The power supply voltage needs to be switched to 110 from 220
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The technician has replaced a power supply with an identical power supply, and now the high end graphics card is not working. Which of the following should the technician check?（）A、The memoryB、The CMOS batteryC、The PCIe power jackD、The processor for chip creep
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A technician suspects the AC voltage into a PC power supply is bad. Which of the following toolswould MOST likely be used to confirm the diagnosis?（）A、MultimeterB、OscilloscopeC、Cable testerD、Power supply tester
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A technician has just installed a new power supply into a desktop computer and now the computer will not turn on. Which of the following is the MOST likely cause?（）A、The voltage selector switch on the power supply is set incorrectly.B、The 3.3v power line is connected to the wrong input on the motherboard.C、The new power supply voltage rating is too high.D、The 12v power cord is installed incorrectly.
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A technician is installing a new power supply into a computer. One of the power supply connectors that the technician needs to connect to the motherboard is square and contains 4-pins. This connector is known as which of the following?（）A、SATAB、FDDC、IDED、ATX
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单选题A technician is locked out of a desktops BIOS because of a forgotten password. Which of the following is a method of removing the password？（）A
Replace the power supply unit.B
Reseat the systems memory.C
Reset the proper jumper.D
Re-install the operating system.
考题
单选题The technician has replaced a power supply with an identical power supply, and now the high end graphics card is not working. Which of the following should the technician check?（）A
The memoryB
The CMOS batteryC
The PCIe power jackD
The processor for chip creep
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单选题After resolving the trouble of main power supply, main switch of emergency generator should（）, if power supply is refreshed.A
be switched off by the duty officerB
be switched on by the duty officerC
be switched off automaticallyD
be switched on automatically
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单选题Which of the following is the MOST likely to cause a server power supply fan to fail but allows the power supply to still be functional？（）A
DustB
Power SurgeC
Excessive humidityD
High temperatures
考题
单选题A technician has just installed a new power supply into a desktop computer and now the computer will not turn on. Which of the following is the MOST likely cause?（）A
The voltage selector switch on the power supply is set incorrectly.B
The 3.3v power line is connected to the wrong input on the motherboard.C
The new power supply voltage rating is too high.D
The 12v power cord is installed incorrectly.
考题
单选题A lightweight access point has been connected to a Catalyst 3550 24-PWR switch， and on power-up the access point fails. What is the problem with the switch？（）A
The power supply has inadequate wattage.B
Power is incorrectly configured on the port.C
It does not support 802.3af Poe.D
Power is not enabled on the port.
考题
单选题A military member has just returned to the United States from Europe and reports their personaldesktop computer does not work. Which of the following is the MOST logical solution to thisproblem?（）A
The computer is unable to work in the US because of EU licensing arrangementsB
The power supply needs to be replaced with one rated for 110 wattsC
The power supply needs a power inverter to handle the change in cyclesD
The power supply voltage needs to be switched to 110 from 220
考题
单选题Which of the following is the BEST case scenario for power fault tolerance within a server？（）A
Redundant power supplies with one power supply connected and one power supply as a hot spare.B
Redundant power supplies with each connected to a separate power circuit.C
Redundant power supplies connected via a Y-cable.D
Redundant power supplies with each connected to the same power circuit.
考题
判断题在PoE术语里PSU全称是Power Supply Unit，指的是供电单元，如PoE交换机的以太网接口。A
对B
错
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