CompTIA A+® Certification All-In-One For Dummies®, 2nd Edition

6.9. Prep Test

1. What are the main power voltages that are provided by standard computer power supplies? (Select all that apply.)

   1. □ 2.1V

   2. □ 3.3V

   3. □ 5V

   4. □ 12V

2. What is the name given to the main type of power supply used in modern computers?

   1. ^ AT

   2. ^ NLX

   3. ^ ATX

   4. ^ WPA

3. What components influence the purchase decision of a power supply? (Select all that apply.)

   1. □ Hard drive

   2. □ Monitor

   3. □ RAM

   4. □ Parallel port scanner

4. What are the standard input voltages for power supplies? (Select all that apply.)

   1. □ 110VDC

   2. □ 120VAC

   3. □ 240VDC

   4. □ 240VAC

5. What is the main function of an AC adapter for a laptop or other device?

   1. ^ Reduce heat involved in converting power between systems.

   2. ^ Supply 3.3VDC, 5VDC, and 12VDC power to your computer through a 20- or 24-pin connector.

   3. ^ Provide power availability during brownout and blackout conditions.

   4. ^ Convert AC power into DC power.

6. Which of the following power conditions does a line conditioner not offer protection against?

   1. ^ Blackout

   2. ^ Brownout

   3. ^ Spike

   4. ^ Surge

7. Which of the following power conditions does a UPS not offer protection against?

   1. ^ Surge

   2. ^ Blackout

   3. ^ Line noise

   4. ^ Rapid cutover