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CompTIA A+ All-in-One (1101+1102) > Power Supplies > Flashcards

Power Supplies Flashcards

1
Q

PC Power

A

AC to DC power

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2
Q

Power Supply connector

A

IEC-320 is the wall plug

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3
Q

Modern Voltage

A

Dual Voltage with a switch

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4
Q

IEC-320 Plug

A

3 holes - hot, neutral, ground

Hot wire carries voltage, pipe
Neutral carries no voltage, drain
Ground allows excess to safely ground

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5
Q

Testing AC Power

A

Use multimeter

Hot outputs 115v
Neutral 0v
Ground 0v

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6
Q

AC Adapters

A

Not interchangable

Check Voltage, Amperage, and Polarity

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7
Q

Multimeter Tests

A

Continuity
Resistance
AC Voltage (VAC)
DC Voltage (VDC)

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8
Q

Continuity

A

Can electrons flow from one end of wire to other

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9
Q

Resistance

A

Use if do not have continuity setting

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10
Q

Sag and Surge

A

Power fluctuations from power company

Can be brownout or blackout

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11
Q

Surge Suppressor

A

absorbs extra voltage

check joules rating, min 2000

UL LCC 1449 rating

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12
Q

UPS

A

Uninterruptible Power Supply

measured in Volt-Amps

comes in online, standby, and line interactive

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13
Q

Power Supply Voltages

A

AC
115/120V US
230V other

DC Voltages
3.3, 5, 12

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14
Q

Most Common Power Supply Size

A

150 x 140 x 86 mm

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15
Q

Component Voltage Uses

A

12v for HDD and OD
3.3 and 5 for onboard electronics

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16
Q

Motherboard connector

A

20 or 24 pin P1 power connector

Some have 4, 6, or 8 pin for extra power

17
Q

Peripheral Power

A

Molex - 5V and 12V for fans and older drives, has chamfers

Mini - Berg connector, 5 and 12v to periphs - floppys

SATA - 15 pin connector, L Shape

18
Q

Splitters and Adapters

A

Create more connections

19
Q

ATX

A

Motherboard power and soft power

20 Pin P! plus molex or mini

20
Q

Rails

A

Over-current protection for power supply connections to components

Single or multi-rail means one or multiple OCPs

21
Q

Subtypes

A

ATX12V 1.3 added P4 extra 12v power, AUX connector 6 pin to supply 3.3 and 5v

EPS12V - server power supplies

22
Q

APFC

A

Active Power Factor Correction

eliminates harmonics

23
Q

Installing Power Supplies

A

Four standard screws
Always unplug an ATX system before doing work

Key or screwdriver short

24
Q

Cooling

A

Power-supply fan
Pulls air into PC

Case fans

25
Q

Maintaining Airflow

A

Closed case, slot covers

26
Q

Reducing Fan Noise

A

Specialty fans
Adjustability

27
Q

Troubleshooting Power Supplies

A

Sudden death or slow fail

Check with multimeter

Test every connection

Try a power supply tester if no mb

28
Q

Slow death of PS

A

Failures are intermittent

Just replace it

29
Q

Fuses and Fire

A

Class C extinguishers ONLY

30
Q

Redundant Power Supplies

A

Two used in a server, RPS, load is balanced between

31
Q

Modular Power Supply

A

Looks clean

32
Q
A

CompTIA A+ All-in-One (1101+1102) (8 decks)

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