Power Supply Unit (PSU)

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 of the acronyms listed below refers to the type of electric current supplied to most of the internal PC components?

AC
HVDC
DC
PFC

Answer 2

DC

Question 3

Which of the following answers refer(s) to voltages generated by modern PC power supplies? (Select all that apply)

+/-3 V
+3.3 V
+5 V
+5.5 V
+/-12 V

Answer 3

+3.3v
+5v
+/- 12V

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?

UPS
PoE
SVC
PSU

Answer 5

UPS

Question 6

Which of the terms listed below refers to a server load balancing setup in which supplied power is split between multiple PSUs?

Standby UPS
Redundant power supply
Dual-power supply
Managed PDU

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:

Amp
Hertz
Volt
Watt