Chapter 17

Question 1

PowerOut/Power In is the formula that defines the __________ specification of a power supply.

Answer 1

Efficiency

Question 2

What is the name of the device that can convert one of the standard voltages to a lower voltage required by the processor?

Answer 2

VRM

Question 3

The ___________ is the part that the author says he has replaced more than any other part

Answer 3

Power Supply

Question 4

What is the test equipment that can be used to test the effects of a brownout on a computer?

Answer 4

Variable Voltage Transformer

Question 5

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

Answer 5

False

Question 6

You can use an adapter to convert a standard peripheral power connector to a SATA power connector?

Answer 6

True

Question 7

What caution does the author give concerning AT/LPX power supply wires.

Answer 7

Two wires outside the power supply case are at lethal voltages

Question 8

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.

Answer 8

true

Question 9

The auxiliary power connector is not included on power supplies sold today.

Answer 9

True

Question 10

What is the biggest cause of component failure in computer systems?

Answer 10

Thermal expansion and contraction

Question 11

A forgotten BIOS password can be reset by ____________

Answer 11

Removing the NVRAM battery

Question 12

An adapter is required to connect a 24-pin connector from a power supply to a 20-pin connector on a motherboard.

Answer 12

False

Question 13

Power supplies with no power factor correction generally use (for work) all of the power they receive from the power company.

Answer 13

False

Question 14

Which of the following is a characteristic of the switching power supplies?

Answer 14

small size

inexpensive

generate little heat

Question 15

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?

Answer 15

Hold-up time

Question 16

Which of the power supply form factors was developed to provide a standard for entry-level servers? This form factor has also introduced features that have later been included in the ATX power supply form factor.

Answer 16

EPS/EPS12v

Question 17

What certification does the author recommend that all electrical equipment (including computers) carry in the USA?

Answer 17

UL

Question 18

What way is best to connect a power supply for testing?

Answer 18

It should be installed in a working computer system

Question 19

What new bus introduced in 2004 required that the main power connector size be increased to 24 pins to supply adequate power for the bus?

Answer 19

PCI Express

Question 20

The author recommends using a three-pong to two-prong adapter for connecting computer equipment to two-prong power receptacles.

Answer 20

False

Question 21

What is the name of the connector on ATX power supplies that increases the power handling capabilities of pins in the connector?

Answer 21

HCS

Question 22

How can most high quality power supplies be reset?

Answer 22

Flipping off the power switch, then switching it back on

Question 23

What shape is the waveform that is output from a good-quality UPS?

Answer 23

True sine wave

Question 24

Name the ways in which a linear power supply is inefficient

Answer 24

Output voltage follows the input voltage making input variations affect the output

Heavy gauge wiring is required

Filtering out the 60 Hz frequency input voltage requires large and expensive filter capacitors and rectifiers

Question 25

______________________ is the word used to describe any power supply that does not conform to one of the standard power supply form factors

Answer 25

proprietary

Question 26

The formula Power Used(used by the computer)/Power Supplied(by the power company) defines the __________ specification for power supplies.

Answer 26

Efficiency (958)

Question 27

Which of the following is an option for powering up a computer by using ATX soft power capabilities

Answer 27

Pressing a keyboard key Configuring a network card for wake on LAN Setting a wakeup time

Question 28

Where is the RTC/NVRAM circuit located on most modern motherboards?

Answer 28

In the south bridge (I/O controller hub)

Question 29

If a power supply provides 300 watts of power to the computer, but receives 350 watts from the power company, what value is this specification for that power supply?( enter the percentage number and round up or down to eliminate the decimal)

Answer 29

86

Question 30

What voltage does a SATA power connector supply that a peripheral power connector does not supply?(use exact voltage but do not use a + or - sign)

Answer 30

3.3

Question 31

Select from the list below the power supply form factor developed to power entry-level servers.

Answer 31

EPS/EPS12v

Question 32

Select the ways that power supplies in computers have historically been overloaded from the list below.

Answer 32

Filling up expansion slots Using high-powered processors Adding drives

Question 33

What can be said about a computer as its operating temperature goes higher?

Answer 33

Its output capability goes down(?)(973)