lesson 6 power and power supplies

Question 1

converts high voltage ac current to low voltage dc current

Answer 1

Power Supply

Question 2

Cycles back and forth rather than traveling in only one direction
▪ Most economical way to transmit electricity

Answer 2

AC current

Question 3

type of current used by mobo , fans and pcie graphics cards

Answer 3

DC current- ( dc current travels in only one direction)

Question 4

common dc voltages and wire colours

Answer 4

3.3V orange, 5V red , 12V yellow and ground black

Question 5

what to consider when purchasing a power supply

Answer 5

1. Type of Power supply and compatibility
2. Wattage and capacity requirements
3. Amount and type of connectors

Question 6

what is power supply rated in

Answer 6

watts

Question 7

at -advanced technology legacy power supply

Answer 7

20 pin power connector

Question 8

ATX12v advanced technology extended

Answer 8

20+4 pin power connector

Question 9

how much power should your power supply have if you plan on future upgrades

Answer 9

It is common practice to add 30% more
wattage on a power supply to plan for
future upgrades

Question 10

ATX 12V version 2

Answer 10

24 pin connector backaward compatible with atx

Question 11

powers Case fans, IDE hard drives,

and optical drives

Answer 11

Molex power connector (4-PIN)

Question 12

Powers Floppy Drives

Answer 12

miniBerg power connector 4 pin

Question 13

Serial ATA hard drives and

optical drives

Answer 13

15 pin power connector

Question 14

Video cards POWER CONNECTOR

Answer 14

PCIE 6 PIN AND 8 PIN

Question 15

single rail architecture

Answer 15

A rail is the printed circuit board (PCB) inside the power supply to which the external cables are connected. A single rail has all of the connectors connected to the same PCB

Question 16

multi rail architecture

Answer 16

a multi rail PCB has separate PCBs for each connector
instance, in dual-rail power supplies, one rail might be dedicated
to the CPU, while the other is used to supply power to all of the other
components that need 12V.

Question 17

increase in
voltage from 115VAC to
120VAC or higher

Answer 17

surge(use surge protector for protection)

Question 18

quick increase in
voltage and then back to
normal

Answer 18

spike( use surge protector for protection)

Question 19

decrease in voltage to
110VAC, if less than a
second known as a sag

Answer 19

brown-out (use ups for protection)

Question 20

total loss in

power

Answer 20

blackout (use ups for protection)

Question 21

power supply fan failure

Answer 21

Replace Could mean other components are on their way out

Question 22

Fuse Failure:

Cause - Overload or due to power supply malfunctioning

Answer 22

Replace - Do not attempt to replace fuse.

Question 23

power supply troubleshooting

Answer 23

never replace a power supply

Question 24

Plugs directly into the power

supply to test for problems

Answer 24

power supply tester

Question 25

commonly use them to measure

power supply voltages.

Answer 25

multi-meter

Question 26

Takes out dust efficiently but

can cause ESD if not used correctly.

Answer 26

computer vaccum

Question 27

used to spray
out dust but should never be used upside down but
at an angle and never directly on case fan blades

Answer 27

Compressed Air and Compressors