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单选题
The user turns on the computer and hears a popping sound and detects a burning smell. Thesystem will not power on. Which of the following is the MOST likely problem?（）
A
Power supply has blown.
B
CPU fan is faulty.
C
Motherboard has overheated and shutdown.
D
UPS has been tripped.
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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 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 computer has been upgraded with a new hard drive and after reassembling the computer and turning the computer on， the drive LED remains lit and an error message during power-on self test （POST） states， ’No Drive Present.’ Which of the following would MOST likely be the cause？（）A、The motherboard was damaged and needs replacing.B、The floppy drive was not reconnected.C、A configuration disk was left in the floppy drive.D、The ribbon cable has been installed incorrectly.
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Which of the following factors is the MOST likely cause of a power supply fan failure？（）A、 Extreme temperature variancesB、 Extreme humidity variancesC、 Power stability fluctuationsD、 Excessive dust accumulation
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单选题An administrator has a malfunctioning uninterruptible power supply (UPS). Which of the following is the MOST likely cause of the problem?（）A
Battery needs to be replacedB
Light switch is turned offC
Smart cable is disconnectedD
UPS needs a firmware update
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单选题A floppy drive is replaced in a computer and now when the computer is turned on the floppy drive light is constantly lit. Which of the following is the MOST likely cause?（）A
The power supply has failed.B
The drive cable is connected backwards.C
The floppy drive has failed.D
The proper drivers have not been loaded.
考题
单选题Which of the following factors is the MOST likely cause of a power supply fan failure？（）A
Extreme temperature variancesB
Extreme humidity variancesC
Power stability fluctuationsD
Excessive dust accumulation
考题
多选题A laptop operates on battery power when connected with an AC adapter. Once the battery discharges, the computer turns off and will not turn back on. Which of the following are the MOST likely causes of the laptop issue? （）(Select TWO).AThe LCD monitor’s power inverter does not function properly.BThe operating system’s power settings prevent the battery from charging.CThe battery is not compatible with the laptop.DThe internal power connection on the motherboard is faulty.EThe power adapter is not working.
考题
单选题Which of the following factors is the MOST likely cause of a power supply fan failure?（）A
Extreme temperature variancesB
Extreme humidity variancesC
Power stability fluctuationsD
Excessive dust accumulation
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.
考题
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An administrator has a malfunctioning uninterruptible power supply （UPS）. Which of the following is the MOST likely cause of the problem？（）A
Battery needs to be replacedB
Light switch is turned offC
Smart cable is disconnectedD
UPS needs a firmware update
考题
单选题An end user reports that their computer is not performing as fast as it used to and it shuts down unexpectedly. Which of the following is the MOST likely cause?（）A
Network data cables are damaged.B
Memory has become unseated.C
The user has defragmented the hard drive.D
Processor cooling fan is not functioning.
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