Hardware Reference
In-Depth Information
Answers to Review Questions
1. C. Ammonia can destroy the antiglare coating on a monitor.
2.
B. Compressed air generates cold as it is expelled from the can. For this reason, it is
sometimes used to cool overheated chips.
3.
B. Compressed air is the best of these solutions because it is least likely to damage the keyboard.
4. B. Alcohol dries quickly and leaves no residue.
5.
A. Use the utility program built into the printer itself, or the printer's driver in the
operating system, to clean the ink jets.
6.
B. Use a soft cloth to buff the fi ngerprints off a DVD.
7.
A. ESD stands for electrostatic discharge—in other words, static electricity.
8.
B. Static electricity is a low-amperage shock, so it does not harm people. However,
it does harm sensitive electronics.
9.
D. Grounding yourself before you touch electronics can prevent you from accidentally
damaging them due to static electricity (ESD).
10. C. Electromagnetic interference, or EMI, is data interference caused by the magnetic fi elds
that build up around adjacent cables that are carrying data.
11. B. A varistor absorbs excess voltage, preventing it from reaching the devices plugged into
the surge suppressor in the event of a power surge or spike.
12. C. An uninterruptible power supply (UPS) is a battery backup system for a PC, usually
combined with surge-suppression capabilities.
13. C. Cold temperatures help a computer by making it easier for it to keep the chips cool that
heat up as it operates. Below freezing, though, frost and condensation may develop, which
can cause short-circuits.
14. A. A system image is a complete copy of the entire hard disk. It is very effective as a backup,
but it takes a long time to make. Therefore most people make a system image infrequently.
15. B. Finder is the fi le-management tool in the Mac OS.
16. C. The root folder, or root directory, is the top level in the fi le structure on a disk.
17. A. Ren, which is short for rename, is the command for renaming a folder or fi le at a
Windows command prompt. The syntax is ren oldname newname .
18. D. Hold down Ctrl to force a drag-and-drop operation to make a copy.
19. B. Task Manager displays running tasks and enables you to shut them down if needed. To
access it, right-click the taskbar and choose Start Task Manager.
20. D. The Display options make text larger or smaller, adjust screen resolution, and can help
you connect to an external display.
Search WWH ::




Custom Search