Solutions for CompTIA A+ Guide to Information Technology Technical Support, 11th Edition Andrews (All Modules included)
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Computer Tech
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Computer Tech
Complete Solutions Manual for CompTIA A+ Guide to Information Technology Technical Support, 11th Edition by Jean Andrews, Joy Dark Shelton, Nicholas Pierce ; ISBN13: 9780357674161. (Full Modules included Module 1 to 21). Lab Manuals, Virtual Lab solutions and Advanced Hardware Lab Simulations inclu...
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CompTIA A+ Guide to Information
Technology Technical Support
11th Edition
by Jean Andrews
Complete Module Solutions Manual
are included (Mod 1 to 21)
** Immediate Download
** Swift Response
** All Chapters included
** Lab Manual & Solutions
** Advanced Hardware
Lab Simulations
, Solution and Answer Guide
JEAN ANDREWS, COMPTIA A+ GUIDE TO IT TECHNICAL SUPPORT, 11TH EDITION, ISBN:
9780357674161; APPENDIX A: SAFETY PROCEDURES AND ENVIRONMENTAL CONCERNS
Table of Contents
Thinking Critically...................................................................................................................................... 1
Hands-On Projects ...................................................................................................................................... 3
Hands-On Project A-1: Practicing Handling Computer Components ...................................................... 3
Hands-On Project A-2: Safely Cleaning Computer Equipment................................................................ 3
Hands-On Project A-3: Researching Disposal Rules ................................................................................ 4
Real Problems, Real Solutions ................................................................................................................... 5
Real Problem A-1: Purchasing a Surge Suppressor .................................................................................. 5
Thinking Critically
1. Your friend tells you that they recently added more RAM to their desktop computer and now applications
crash at odd times. What is one question you might ask your friend to understand the source of the
problem?
a. Did you void the warranty when you opened the computer case?
b. Did you wear an ESD bracelet when you did the upgrade?
c. Did you smell smoke when you first turned on the computer after the upgrade?
d. Have you cleaned up the hard drive after the RAM upgrade?
Answer: b. Did you wear an ESD bracelet when you did the upgrade?
RAM is especially susceptible to ESD.
2. You are setting up a small network for a home office and plan to purchase a surge suppressor to protect
the equipment. Which type of measurement of electricity will you look for to rate the surge suppressor?
a. Volts
b. Joules
c. Watts
d. Ohms
Answer: b. Joules
Joules measure the work a device can expend before it can no longer protect the circuit from a power
surge.
3. You are building a computer from scratch and plan to use it to do your schoolwork. What range and
electrical measurement might you expect is reasonable for the power supply in the system?
a. 200–500 volts
, b. 100–1000 watts
c. 200–500 watts
d. 100–1000 volts
Answer: c. 200 to 500 watts
A power supply is rated in watts, which is a measure of the total electrical power needed to operate a
device. A computer used for standard office purposes is likely to require about 200–500 watts.
4. Which of the following statements is true? (Choose all that apply.)
a. A rectifier converts AC to DC, and an inverter converts DC to AC.
b. An inverter converts AC to DC, and a rectifier converts DC to AC.
c. A transformer changes the ratio of DC to AC.
d. A transformer changes the ratio of voltage to current.
Answer: a. A rectifier converts AC to DC, and an inverter converts DC to AC; d. A transformer
changes the ratio of voltage to current.
A rectifier converts alternating current to electrical current that flows in only one direction. An inverter
converts electrical current that flows in only one direction to electricity that alternates direction. A
transformer can step up voltage and step down current or can step up current and step down voltage. A
computer uses direct current and low voltage, and a power supply in a computer is both a rectifier and
a transformer.
5. Inside a desktop computer, which color wire is likely to be ground?
a. Red
b. Yellow
c. White
d. Black
Answer: d. Black
A computer uses DC circuits. In DC circuits, the common practice is to make wires used for ground to
be the color black.
6. Which device or tool is designed to protect a computer against ESD?
a. Power supply
b. Class C fire extinguisher
c. Surge suppressor
d. Ground bracelet
Answer: d. Ground bracelet
When using a ground bracelet correctly, ESD is dissipated between you and the computer before you
touch sensitive computer components.
7. Which of the following is most likely to damage a hard drive installed and running inside a computer in a
business environment?
a. Humidity
b. High temperature
c. ESD
d. Electrical fire
, Answer: a. Humidity
Computer equipment is sensitive to high humidity, which is why many computer shops run a
dehumidifier in the building.
8. What is best practice for disposing of laser printer toner cartridges?
a. Throw them in the trash.
b. Return them to the manufacturer.
c. Put them in a recycling bin.
d. Mail them to the government recycling center.
Answer: b. Return them to the manufacturer.
The manufacturer might reuse the toner container or can, otherwise, properly dispose of them.
9. Which type of fire extinguisher is rated for electrical fires?
a. Class A
b. Class B
c. Class C
d. All of these
Answer: c. Class C.
A Class C fire extinguisher uses nonconductive chemicals to put out a fire caused by electricity.
Working with a partner, you’ll need some computer parts and the antistatic tools you learned about in this appendix.
Practice touching and picking up the parts and passing them between you. As you do so, follow the rules to protect
the parts against ESD. Have a third person watch as you work, and point out any ways you might have exposed a
part to ESD. As you work, be careful not to touch components on circuit boards or the gold “fingers” on the edge
connector of an expansion card. When you are finished, store the parts in antistatic bags.
Solution Guidance:
Students show that they are able to protect computer parts from ESD.
Practice some preventive maintenance tasks by following these steps to clean a computer:
1. Shut down the computer and unplug it. Press the power button to drain power.
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