Power

Question 1

In DC power, electrons flow:

Answer 1

One way.

Question 2

What should you do if you find an AC outlet is improperly wired?

Answer 2

Contact your supervisor and/or building management to resolve the problem.

Question 3

What should you use to keep an AC outlet’s voltage steady?

Answer 3

A UPS or line conditioner.

Question 4

What tool would you use to test the amount of voltage that comes from an AC outlet?

A. Multimeter
B. Voltage detector
C. Receptacle tester
D. Impedance tester

Answer 4

A. Multimeter

Question 5

Which of the following is a representation of potential energy?

A. Wattage
B. Voltage
C. Impedance
D. Amperage

Answer 5

B. Voltage

Question 6

Which wire when tested should display zero volts on a multimeter?

A. Neutral
B. Hot
C. Ground
D. Red

Answer 6

C. Ground

Question 7

What is an unexpected increase in the amount of voltage provided?

Answer 7

Surge

Question 8

What is a short transient and voltage that can be due to a short circuit, tripped circuit breaker, power outage, or lightning strike?

Answer 8

Spike

Question 9

What is an unexpected decrease in the amount of voltage provided?

Answer 9

Sag

Question 10

What is a total loss of power for a prolonged period?

Answer 10

Blackout

Question 11

What is it called when the voltage drops to such an extent that it typically causes the lights to dim and causes computers to shut off?

Answer 11

Brownout

Question 12

What is a group of sockets usually in line with a flexible cable that plugs into an AC outlet called?

Answer 12

Power strip

Question 13

What is a power strip that also incorporates a metal-oxide varistor (MOV) to protect against surges and spikes?

Answer 13

Surge protector

Question 14

What takes the functionality of the surge suppressor and combines that with the battery backup?

Answer 14

Uninterruptible power supply (UPS)

Question 15

Don’t ever connect laser printers, surge protectors, or power strips to UPS devices.

Answer 15

It can cause the UPS to overload.

Question 16

Which device should you use to protect against power outages?

A. Multimeter
B. UPS
C. FedEx
D. Surge protector

Answer 16

B. UPS

Question 17

You want a cost-effective solution to the common surges that can affect your computer. Which device would be the best solution

A. UPS
B. Surge protector
C. Power strip
D. Line conditioner

Answer 17

B. Surge Protector

Question 18

Which of these is an unexpected increase voltage?

A. Sag
B. Blackout
C. Spike
D. Whiteout

Answer 18

C. Spike

Question 19

You’re fixing a computer for a customer when you notice a few of the fluorescent lights flickering every now and then. What should you recommend to the customer to protect their equipment?

A. To get an electrician
B. To install a UPS.
C. To get an extra power supply.
D. To buy a generator.

Answer 19

B. To install a UPS

Question 20

Original ATX power supplies connect to motherboard with:

Answer 20

20 pin connector

Question 21

Newer ATX 12V 2.x power supplies connect with:

Answer 21

24 pin connector

Question 22

Never open a power supply!

Answer 22

If it has failed, replace it with a working unit.

Question 23

Which device test multiple wires of a power supply at the same time?

A. Multimeter
B. Power supply tester
C. Line conditioner
D. Surge protector

Answer 23

B. Power supply tester

Question 24

Which power connector would be used to power an IDE hard drive?

A. Molex
B. Mini
C. P1
D. P8/P9

Answer 24

A. Molex

Question 25

Which of the following uses a 24 pin main motherboard power connector? A. ATX B. ATX 12V 1.3 C. ATX 12V 2.0 D. ATX 5V 2.0

Answer 25

C. ATX 12V 2.0

Question 26

What voltages are supplied by a Molex power connector? A. 12V and 5V B. 5V and 3.3V C. 3.3V and 1.5V D. 24V and 12V

Answer 26

A. 12V and 5V

Question 27

The company sales person just returned to the United States after three months in Europe. Now the sales person tells you that the PC, which works fine in Europe, won't turn on. What is the best solution? A. Install a new power supply B. The computer will not work in the United States due to European licensing. C. Install a power inverter to the power supply. D. Change the voltage from 230 to 115.

Answer 27

D. Change the voltage from 230 to 115.

Question 28

You're troubleshooting a computer that won't power on. You have already checked the AC outlet and the power cord, which appear to be functioning properly. What should you do next? A. Test the computer with the PSU tester. B. Plug the computer into a different outlet. C. Check that the RAM is seated correctly. D. Install a UPS.

Answer 28

A. Test the computer with a PSU tester.

Question 29

You suspect that incorrect voltage is provided to a power supply. What tool should you use to test this? A. PSU tester B. Loopback adapter C. Multimeter D. Voltage detector

Answer 29

C. Multimeter

Question 30

You just upgraded a motherboard in a computer, and put the system back together. It boots, but the power LED on the front of the computer case doesn't light when the system is on. The rest of the computer seems to work fine. What should you do first? A. Check the power supply. B. Check the power LED pinout. C. Replace the LED. D. Replace the power button.

Answer 30

B. Check the power LED pinout.

Question 31

A computer you were troubleshooting shuts down without warning. After a few minutes it boots back up fine, but after running for short time, it shuts down again. What components could be the cause? (Select the two best answers.) ``` A. Power Supply B. SATA hard drive C. RAM D. CPU fan E. Video card ```

Answer 31

A and D. Power supply and CPU fan. The RAM, video card, and hard drive should not cause the system to suddenly shut down.

Question 32

In AC power, electrons flow:

Answer 32

Alternating.