Chapter 17 Flashcards
PowerOut/Power In is the formula that defines the __________ specification of a power supply.
Efficiency
What is the name of the device that can convert one of the standard voltages to a lower voltage required by the processor?
VRM
The ___________ is the part that the author says he has replaced more than any other part
Power Supply
What is the test equipment that can be used to test the effects of a brownout on a computer?
Variable Voltage Transformer
If the system is locked up or corrupted it can remain running when you press the power switch to turn it off; In that case, it is possible to use the same power switch to override the normal OS “soft power” off and force the computer to shut down by pressing and holding it for 2 seconds
False
You can use an adapter to convert a standard peripheral power connector to a SATA power connector?
True
What caution does the author give concerning AT/LPX power supply wires.
Two wires outside the power supply case are at lethal voltages
It is possible to plug the connectors from an AT power supply into the motherboard connector incorrectly if don’t properly line up the male and female connectors and plug them in so that the pins are offset between the two.
true
The auxiliary power connector is not included on power supplies sold today.
True
What is the biggest cause of component failure in computer systems?
Thermal expansion and contraction
A forgotten BIOS password can be reset by ____________
Removing the NVRAM battery
An adapter is required to connect a 24-pin connector from a power supply to a 20-pin connector on a motherboard.
False
Power supplies with no power factor correction generally use (for work) all of the power they receive from the power company.
False
Which of the following is a characteristic of the switching power supplies?
small size
inexpensive
generate little heat
What is the name of the power supply specification that indicates the amount of time a power supply can maintain its output voltages after the input voltage is lost?
Hold-up time