单选题When replacing a power supply， what MUST the technician observe？（）A voltageB currentC wattageD resistance

题目
单选题
When replacing a power supply， what MUST the technician observe？（）
A

voltage

B

current

C

wattage

D

resistance

相似考题

1.A technician is testing a power supply for correct output voltages at the HDD power connector.Which of the following voltages should the technician expect for a correctly working power supply?()A.6VB.9VC.12VD.24V

2.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

3.Whenreplacingapowersupply,whatMUSTthetechnicianobserve?()A.voltageB.currentC.wattageD.resistance

4.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

更多“单选题When replacing a power supply， what MUST the technician observe？（）A voltageB currentC wattageD resistance”相关问题

  • 第1题：

    When a grounding strap is not available, a technician can ground by touching the computer’s:()

    A. power supply.

    B. CPU fan.

    C. memory chips.

    D. motherboard.


    参考答案：A

  • 第2题：

    When a grounding strap is not available, a technician can ground by touching the computer’s:（）

    • A、power supply.
    • B、CPU fan.
    • C、memory chips.
    • D、motherboard.

    正确答案:A

  • 第3题：

    Which of the following should the technician do FIRST when replacing a motherboard?（）

    • A、Use a benchmarking tool
    • B、Use anti-static wrist band
    • C、Remove the CPU
    • D、Remove the power supply

    正确答案:B

  • 第4题：

    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.

    正确答案:D

  • 第5题：

    A customer states their computer was fine until yesterday when they heard a pop noise and thecomputer stopped working. Which of the following components should the technician test FIRST?（）

    • A、Main system board
    • B、Processor
    • C、Hard disk drive
    • D、Power supply

    正确答案:D

  • 第6题：

    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、Multimeter
    • B、Oscilloscope
    • C、Cable tester
    • D、Power supply tester

    正确答案:A

  • 第7题：

    When replacing a power supply， what MUST the technician observe？（）

    • A、voltage
    • B、current
    • C、wattage
    • D、resistance

    正确答案:C

  • 第8题：

    单选题
    Which of the following should the technician do FIRST when replacing a motherboard?（）
    A

    Use a benchmarking tool

    B

    Use anti-static wrist band

    C

    Remove the CPU

    D

    Remove the power supply


    正确答案： C
    解析： 暂无解析

  • 第9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 memory

    B

    The CMOS battery

    C

    The PCIe power jack

    D

    The processor for chip creep


    正确答案： C
    解析： 暂无解析

  • 第10题：

    单选题
    When replacing a power supply， what MUST the technician observe？（）
    A

    voltage

    B

    current

    C

    wattage

    D

    resistance


    正确答案： B
    解析： 暂无解析

  • 第11题：

    单选题
    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.


    正确答案： A
    解析： 暂无解析

  • 第12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.


    正确答案： B
    解析： 暂无解析

  • 第13题：

    材料：

    The field current supply in older machines comes from a lower voltage direct current generator or exciter on the same shaft as the alternator. Modern machines however are either statically excited or of the high-speed brush-less type. The exciter is required to operate to counter the effects of power factor for a given load. The power factor is a measure of the phase difference between voltage and current and is expressed as the cosine of the phase angle. With a purely resistance load the voltage and the current are in phase, giving a power factor of one. The power consumed is therefore the product of voltage and current. Inductive or capacitive loads, combined with resistance loads, produce lagging or leading power factors which have a value less than one.

    The power consumed is therefore the product of current, voltage and power factor. The alternating current generator supplying a load has a voltage drop resulting from the load. When the load has a lagging power factor this voltage drop is considerable. Therefore the exciter, in maintaining the alternator voltage, must vary with load current and also the power factor. The speed change of the prime mover must also be taken into account.

    问题： The word “machines” in the passage refers to _____.

    A.the direct current generator

    B.the alternating current generator

    C.the exciter

    D.the prime mover

    Which of the following statements is true according to the passage ?

    A.With a purely resistance load, the power factor is zero

    B.Inductive loads combined with resistance loads produces leading power factors

    C.Capacitive loads combined with resistance loads produces lagging power factors

    D.With a purely resistance load, the phase angle is zero

    When the load has a lagging power factor this voltage drop is considerable. This sentence means that _____.A.with a purely resistance load, the voltage drops too much

    B.there is a considerable voltage drop in the capacitive load combined with resistance load

    C.when the load is the capacitive load combined with resistance load, the voltage drops to zero

    D.when the load is the inductive load combined with resistance load, the voltage drop is fairly large

    The exciter must vary with: ① load current ② the power factor, ③ speed change of the prime mover.A.①

    B.②

    C.①②

    D.①②③

    请帮忙给出每个问题的正确答案和分析，谢谢！


    问题 1 答案解析：B


    问题 2 答案解析：D


    问题 3 答案解析：D


    问题 4 答案解析：D

  • 第14题：

    If a technician suspects that the voltage being delivered to a desktop computer’s power supply is insufficient or incorrect, which device should be used to determine the correct voltage?（）

    • A、A power supply tester
    • B、A multimeter
    • C、A loopback adapter
    • D、A cable tester

    正确答案:B

  • 第15题：

    A technician does not have power to a PC. Which of the following tools should the technician use to check for electricity?（）

    • A、Cable tester
    • B、Power supply tester
    • C、Tone generator
    • D、Multimeter

    正确答案:D

  • 第16题：

    A technician is testing a power supply for correct output voltages at the HDD power connector. Which of the following voltages should the technician expect for a correctly working power supply?（）

    • A、6V
    • B、9V
    • C、12V
    • D、24V

    正确答案:C

  • 第17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 memory
    • B、The CMOS battery
    • C、The PCIe power jack
    • D、The processor for chip creep

    正确答案:C

  • 第18题：

    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、SATA
    • B、FDD
    • C、IDE
    • D、ATX

    正确答案:D

  • 第19题：

    A technician arrives in Germany and discovers that when their PC is plugged into the outlet, nopower is received. Which of the following actions should the technician take to get the PC tooperate?（）

    • A、Change the BIOS settings to the local time
    • B、Adjust the voltage selector switch
    • C、Attach a 220 volt power strip from the current region to the PC
    • D、Attach a 120 volt battery backup power supply to the PC

    正确答案:B

  • 第20题：

    单选题
    A technician arrives in Germany and discovers that when their PC is plugged into the outlet, nopower is received. Which of the following actions should the technician take to get the PC tooperate?（）
    A

    Change the BIOS settings to the local time

    B

    Adjust the voltage selector switch

    C

    Attach a 220 volt power strip from the current region to the PC

    D

    Attach a 120 volt battery backup power supply to the PC


    正确答案： C
    解析： 暂无解析

  • 第21题：

    单选题
    A technician does not have power to a PC. Which of the following tools should the technician use to check for electricity?（）
    A

    Cable tester

    B

    Power supply tester

    C

    Tone generator

    D

    Multimeter


    正确答案： D
    解析： 暂无解析

  • 第22题：

    单选题
    If a technician suspects that the voltage being delivered to a desktop computer’s power supply is insufficient or incorrect, which device should be used to determine the correct voltage?（）
    A

    A power supply tester

    B

    A multimeter

    C

    A loopback adapter

    D

    A cable tester


    正确答案： D
    解析： 暂无解析

  • 第23题：

    单选题
    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

    SATA

    B

    FDD

    C

    IDE

    D

    ATX


    正确答案： D
    解析： 暂无解析

  • 第24题：

    单选题
    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

    Multimeter

    B

    Oscilloscope

    C

    Cable tester

    D

    Power supply tester


    正确答案： A
    解析： 暂无解析

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