CompTIA A+ Exam 220-1101 - PSU Quiz

Question 1

A PC Power Supply Unit (PSU) can accept the voltage of 110-120 VAC (Volts of Alternating Current), or 220-240 VAC.

PSU’s operation can be adjusted to the supplied voltage either with the use of a manual selector switch on the back of the device or automatically by the device.

PSUs equipped with manual selector switch are referred to as fixed-input devices, PSUs offering automatic voltage adjustment are known as auto-switching PSUs.

TRUE / FALSE

Answer 1

TRUE

Question 2

Which acronyms refer to the type of electric current supplied to most of the internal PC components?

Answer 2

DC

Question 3

Which refer(s) to voltages generated by modern PC power supplies?

Answer 3

+3.3 V

+5 V

+/-12 V

Question 4

Modern ATX motherboards use a 24-pin power connector, however many power supplies might be equipped with a 20-pin power connector for backward compatibility with older motherboards and a separate 4-pin connector for delivering power to PCIe slots on newer motherboards.
The 20+4 connector can be used with either 20- or 24-pin motherboards (in case of a 20-pin motherboard power slot, the 4-pin connector simply remains unattached to the board).

TRUE / FALSE

Answer 4

TRUE

Question 5

What is the name of a device that can provide short-term emergency power during an unexpected main power source outage?

Answer 5

UPS = uninterruptible power supply

Question 6

Which terms refer to a server load balancing setup in which supplied power is split between multiple PSUs?

Answer 6

Redundant power supply

Question 7

The term “Modular power supply” refers to a PSU equipped with detachable cables.

TRUE / FALSE

Answer 7

TRUE

Question 8

The power output rating of a PSU is based on a measurement unit known as:

Answer 8

Watt