3.5 - Given a scenario, install or replace the appropriate power supply

Question 1

What do power supplies do?

3.5 Given a scenario, install or replace the appropriate power supply

Answer 1

Convert AC power to DC power

Computer components opoerate on DC, while the power source supplies AC

Question 2

What does voltage measure?

3.5 Given a scenario, install or replace the appropriate power supply

Answer 2

The force pushing through a system

Like adjusting water flow through a hose by opening or closing a faucet

Question 3

Meaning of PSU?

3.5 Given a scenario, install or replace the appropriate power supply

Answer 3

Power Supply Unit

Question 4

What do you need to consider when choosing a PSU?

3.5 Given a scenario, install or replace the appropriate power supply

Answer 4

• Type of power supply
• Wattage requirements
• Number & type of connectors

Question 5

2 types of AC voltage outputs from PSUs?

3.5 Given a scenario, install or replace the appropriate power supply: Input

Answer 5

• 110-120VAC
• 220-240VAC

Question 6

What is the standard VAC in the U.S.?

3.5 Given a scenario, install or replace the appropriate power supply: Input

Answer 6

110-120VAC

Mismatched voltage can quickly damage devices. A 110-V device in a 220-V outlet may burn out, and a 220-V device in a 110-V outlet may work temporarily but will eventually stop.

Question 7

3 common DC voltages PSUs output?

3.5 Given a scenario, install or replace the appropriate power supply: Output

Answer 7

• 3.3v
• 5V
• 12v

Question 8

What does the PSU ensure to each componenet?

3.5 Given a scenario, install or replace the appropriate power supply: Output 3.3V vs 5V vs 12V

Answer 8

Ensures they receive the right power

Question 9

Why do MOBO adapters have 4 detachable pins?

3.5 Given a scenario, install or replace the appropriate power supply: 20-pin to 24-pin MOBO adapter

Answer 9

To connect to legacy MOBOs

Question 10

What do redundant PSUs mean?

3.5 Given a scenario, install or replace the appropriate power supply: Redundant power supply

Answer 10

Using multiple PSUs for redundancy & fault-tolerance

If 1 PSU fails, the other PSU takes over

Question 11

What do modular PSUs allow?

3.5 Given a scenario, install or replace the appropriate power supply: Modular power supply

Answer 11

To choose the cables you need

Question 12

How are PSUs commonly rated in?

3.5 Given a scenario, install or replace the appropriate power supply

Answer 12

Watts (W)

Question 13

What is the PSU wattage rating?

Answer 13

PSU’s max power output at full load capacity

Question 14

How is Watts calculated?

Answer 14

By multiplying Volts by Amps

i.e. a 120-volt device drawing 0.5 amps results in 60W of power usage