Chapter 07 Power Supplies

11. A surge suppressor should have a rating of at least _______________. A. 330-V B. 400-V C. 800-V D. 1449-V

A

13. Large sags in electricity are also known as _______________. A. brownouts B. blackouts C. spikes D. surges

A

16. Power supplies come with a standard _______________ for the motherboard and interior devices. A. connector B. hole C. pin D. suppressor

A

17. Modern motherboards use a 20- or 24-pin _______________. A. P1 B. P2 C. P3 D. P4

A

18. The standard modern power supply provides _______________ volts of power. A. 3.3, 5.0, and 12.0 B. 5.0 and 12.0 C. 6.0 and 12.0 D. 12.0

A

19. Which connector is the most common type of connector used for devices that require 5 V or 12 V of power? A. Molex B. P1 C. P4 12 V D. sub-mini connector

A

2. Which unit is used to measure current? A. Ampere B. Ohm C. Volt D. Watt

A

22. Most case fans have standard _______________ connectors that are easy to plug in but can be forced to be connected the wrong way. A. Molex B. mini C. micro D. sub-mini

A

23. The notches that guide installation in the Molex connector are called _______________. A. chamfers B. channels C. ports D. sockets

A

27. Which power supply never turns off? A. ATX B. AT C. P8, P9 D. P1

A

29. The _______________ power supply has a 24-pin main motherboard that resembles a 20-pin ATX connector. A. EPS12V B. Molex C. mini D. P421V

A

34. A(n) _______________ power supply smooths out power coming from the wall before passing it to the main power supply circuits, which eliminates harmonics. A. Active PFC B. EPS 12V C. SPS D. UPS

A

40. If a power supply is smoking or heating up, what is the best action to take? A. Stop using it and replace it immediately. B. Replace the fuse. C. Switch the voltage from 110 to 220. D. Replace the power supply fan.

A

1. The pressure of the electrons in a wire is measured in units called _______________. A. amperes B. volts C. watts D. ohms

B

20. The largely extinct 3.5-inch floppy disk drive uses the _______________ connector. A. Molex B. mini C. P1 D. P4 12V

B

24. Modern power supplies have multiple _______________. A. fuses B. connectors C. fans D. voltage selectors

B

26. Which tool uses the soft power feature? A. AT B. ATX C. SATA connectors D. Molex power supply

B

30. Which is the latest ATX power supply standard? A. ATX12V 1.3 B. ATX12V 2.0 C. ATX12V 3.0 D. EPS12V

B

32. How many watts of power does a typical hard drive in a PC require? A. 10 B. 15 C. 20 D. 25

B

37. Which statement is true of computer cases? A. An open case allows for better cooling. B. An open case lowers cooling efficiency. C. Small cases do not require cooling. D. Large cases do not require cooling.

B

12. What UL rating is preferred for a surge suppressor? A. UL497A B. UL1497A C. UL1449 D. 1750 joules

C

14. What occurs when power cuts out completely? A. Sag B. Brownout C. Blackout D. Spike

C

28. Which industry group came up with a non-ATX standard motherboard and power supply called EPS12V? A. Hardware System Infrastructure B. Server Power Infrastructure C. Server System Infrastructure D. Software System Infrastructure

C

3. Which unit is used to express the number of amps and volts needed by a particular device to function? A. Ampere B. Ohm C. Volt D. Watt

C

31. In the past, how much power was supplied by power supplies with 12-V rails? A. 3 amps B. 30 amps C. 18 amps D. 81 amps

C

33. How many watts of power does an Intel i7-4790K require at peak performance? A. 50 B. 101 C. 151 D. 200

C

39. What class of fire extinguisher should be used on an electrical fire? A. Class A B. Class B C. Class C D. Class D

C

4. Which unit is used to measure resistance? A. Joule B. Ampere C. Ohm D. Watt

C

5. What type of voltage does a PC use? A. AC B. DC C. Ground D. LC

C

6. In an IEC-320 plug, which wire carries electrical voltage? A. Earth B. Ground C. Hot D. Neutral

C

8. A coworker is taking a computer overseas and asks you what concerns he should have. What do you tell him? A. Rest assured that there are no issues with computer use overseas. B. Prepare for the fact that his PC will not work overseas. C. Make sure he switches the power supply to 230AC. D. Make sure he switches the power supply to 115AC.

C

10. How is DC voltage represented on multimeters? A. V with a ~ below it B. V with a dash below it C. V with a ~ above it D. V with a solid line above a dashed line

D

15. How should an electronic device be protected during an electrical storm? A. Place the device in standby mode. B. Connect the device to a surge suppressor. C. Connect the device to a UPS. D. Unplug the device.

D

21. Mini connectors (Berg connectors) are used for _______________ power. A. central B. AC C. backup D. peripheral

D

25. What type of power connector is L-shaped? A. P1 B. Mini C. Molex D. SATA

D

35. Power supplies are rated for efficiency based on _______________ drawn to supply sufficient power to the PC. A. amperes B. ohms C. volts D. watts

D

36. Empty expansion bays must be covered by a _______________ to maintain proper airflow inside the case. A. case sheath B. case cover C. slot lid D. slot cover

D

38. A PC does not work. What should you check first? A. The tower supply voltages B. The 12 V power supply C. Whether the DC plug is plugged in D. Whether the AC plug is plugged in

D

7. Which type of wire carries no voltage? A. Ground B. Hot C. Multimeter D. Neutral

D

9. What should be the outputs of the hot, neutral, and ground wires, respectively, when tested with a multimeter? A. 0 V, 115 V, 0 V B. 0 V, 115 V, 2 V C. 112 V, 115 V, 0 V D. 115 V, 0 V, 0 V

D