Unit4 1 Suggested Answers 1 Flathead screwdrivers, wire strippers, Phillips screwdrivers, needlenose pliers, hammers, and diagonal cutters are some tools used when working on electroni
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Trang 3Published by Express Publishing
Liberty House, Greenham Business Park, Newbury,
This book is not meant to be changed in any way
ISBN 978-1-78098-697-5
Trang 4Book Answer Key
Unit 1
1 Suggested Answers
1 Televisions, mobile phones, digital cameras, DVD
players, speakers, and computers are examples
2 A digital camera B speaker
3 A cell phone B MP3 player
5 Suggested Answer
A good addition to the stereo is a set of speakers
This will improve the sound and listening experience
B: Thanks for calling Electronics Superstore What
can I do for you today?
A: I want to order the Studio 5GK television
B: Okay, great Is there anything else you need?
A: I'd also like the Theater DVD player
B: Those are also part of our sale today
A: Really? That's terrific! What does it come out to?
B: Your total is $495.99, before taxes and shipping
Why did you purchase these items? They were on
sale and I needed to update my electronics
How did you place your order? I called the toll-free
number
4 Answer Key
Unit 2
1 Suggested Answers
1 A volt is one unit of measurement in electricity
2 Copper wire is used in electrical wiring because it conducts electricity
7 1 confused 3 current 5 blockage
2 resistance 4 work 6 less
A: Oh, okay But what's the difference between amperes and watts?
B: A watt is the unit of measurement of electric power A: OK I see the difference now
B: Good
9 Suggested Answer Electricity 101 Monday, 8-10 What are some units of measurement for electricity? An ampere and a watt are some units
of measurement for electricity
How are they different? An ampere measures electric current, and a watt measures electric power
Trang 52 direct current - comes from batteries, moves from
A transformer is useful because it can change
alternating current to direct current
A: Can I ask you a question about electricity?
B: Sure What do you want to know?
A: What is capacitance? I don't really get the concept
B: Well, capacitance is the ability to store a quantity
of electricity in an electric field
A: What about inductance?
B: That's the ability to store electricity in a magnetic
field
A: Oh, I see Thanks
B: No problem
9 Suggested Answer
Capacitance: Capacitance is the ability to store an
amount of electricity in an electric field
Inductance: Inductance is the ability to store electricity
in a magnetic field
Unit4
1 Suggested Answers
1 Flathead screwdrivers, wire strippers, Phillips
screwdrivers, needlenose pliers, hammers, and
diagonal cutters are some tools used when
working on electronics
2 Wire strippers and diagonal cutters can be used
for cutting wires
A: Good, but you will also need wire strippers
B: Okay, what's the best brand of wire strippers? A: I prefer Amos wire strippers
B: Okay, thanks Do you recommend anything else? A: Yes, I really like to use a magnifier when working with wires I suggest you get one
9 Suggested Answer Advice from the professional electrician Electrical tape - already have this
Wire strippers - Amos
Magnifier - good for working with wires
Unit 5
1 Suggested Answers
2
1 A bench vise can be used to hold things in place
2 A glue gun or super glue can be used to stick components to a surface
Trang 6Book Answer Key
A: Welcome to Classic City Electric Supply How
may I help you?
B: Hi, I have a question What do I use to attach wires?
A: What are you attaching them to?
B: To a component surface
A: I think you should use a glue gun
B: What about super glue?
A: With a glue gun, your work will be more accurate
B: OK I'll take a glue gun
9 Suggested Answer
Classic City Electric Supply Co
Customer Feedback Form
What did you purchase? I purchased a glue gun
Did you get help from an employee? y / N
Was he or she helpful? If so, please explain The
employee was very helpful She told me to purchase
a glue gun instead of super glue, as it will make my
work more accurate
Unit6
1 Suggested Answers
2
3
1 Soldering irons, solder suckers, and solder wick
are some soldering tools
2 A solder sucker uses a vacuum pump to remove
old solder
F 2 F 3 T
bond 2 components 3 melt
4 1 solder, soldering iron
2 solder wick, desoldering iron, solder sucker
3 flux, tip, vacuum pump
A: How does it work?
B: It's got a copper thread that bonds with the solder when heated Let me show you what to do A: Thank you very much
9 Suggested Answer How to remove solder with solder wick
To remove solder, you can use solder wick It is braided with a copper thread that bonds with the solder when heated
2 A multi meter can measure various different values
Trang 7A: You called at a great time There's a special offer
on those right now Multimeters are thirty percent
off
B: Awesome I want six How much is that?
A: Each counter is $100 So, it's $600 for six
B: Does that price include shipping?
A: Shipping is free on orders over $300
B: That's good to hear
It is important to have a power strip for a good
works pace because it lets you plug in extra electrical
devices, such as a lamp
7 1 new workspace 4 lighting
2 do you recommend 5 May I suggest
3 sturdy and large 6 power strips
8 Suggested Answer
A: Hello, how can I help you?
B: I need some items to set up my new workspace
A: Okay, what sort of work do you do?
B: I repair electronics I use a lot of electrical tools
A: Then you need to start with a modern, grounded
electrical service
B: Okay, thanks Do I need anything else?
A: Yes, if you use a lot of electrical tools, may I
suggest a power strip?
B: Good idea Any other suggestions?
A: Yeah, make sure your workplace floor isn't covered with thick or dark carpet
9 Suggested Answer Notes for new workspace Electrical outlets needed
Modern, grounded electrical service Power strip for extra tools
7 1 experience 4 team player
2 job duties 5 work well
3 assembled and tested 6 candidates
Answer Key 7
Trang 8Boo · 1 Answer Key
B: I have a two year Associates Degree from Bowler
Education: I completed two years of college I have
an Associates Degree in electronics
Experience: I have previously worked as an electronics
technician for three years My job involved assembling
and testing models I led a team for the final year
Suitability: I work well in a team setting, but am also
comfortable leading a group
Technicians climb ladders when they need to be
higher up They also climb flights of stairs to reach
job sites
3 Bending and crouching 6 ten flights
8 Suggested Answer
A: I'm new here What's the work like?
B: Overall, it's decent It varies from job to job
A: What was your worst job?
B: Once, I spent six hours on a ladder repairing
lighting The repairs involved a lot of reaching and
twisting I was pretty sore
A: I bet How much weight do you have to carry at
work?
8 Answer Key
B: We rarely need to carry more than 251bs
A: That's not too bad Any other problems?
B: Sometimes sitting at a workbench for hours can
be sore on the back
9 Suggested Answer Job advertisement Position: electronics technician Physical description: this is a physically demanding
position Applicants must be in good health
Requirements: climbing ladders, sitting for long periods of time, reaching and twisting
Lifting limits: Applicants must be able to lift 251bs repeatedly, on a regular basis It is unlikely technicians will be asked to lift more than that weight
2 Working on poles and towers requires working at elevated heights
A: What is your ideal job setting?
B: I'd like to work in a little shop where it's quiet
A: Really? Why do you feel that way?
B: I think it is less stressful A: I don't think that sounds very interesting
B: Well, what kind of job setting do you like?
A: I like to work on a construction site, where there's always lots of activity
B: I don't think I agree with you on that one
I
Trang 99 Suggested Answer
To: channeI11.hr@elevenstudios.net
From: cohen.j@broadband.net
Subject: Part-time Position Inquiry
Good Afternoon,
about the part-time electronics technician position
I have prior experience working in a radio studio
I have also worked in a shop where I fixed small
electronic appliances
Unit 12
2
1 Rubber is an example of a non-conductive material
2 Workers should not wear jewelry when working
You shouldn't touch live connection points because
you might get a shock
B: What should I do?
A: You'll need to get shoes with rubber soles
B: Okay
A: And remember to always check that the machine
is turned off
B: Okay, thanks for warning me
9 Suggested Answer Electrical safety Dos and Don'ts Always:
Wear shoes with rubber soles
Turn off the device before you start work
B: Yes, they do It's important for taking measurements
of parts
Answer Key 9
Trang 10Book 1 Answer Key
9 Suggested Answer
Why I need to take this math course
Reason: Math is used by technicians a lot
Skills: Multiply and divide decimals
Technicians do this a lot in their work
Used for taking measurements of parts
Unit 14
1 Suggested Answers
1 Audio voltage is measured in decibels
2 Atmospheric pressure is measured in millibars
B: What are you up to?
A: I'm just repairing this amplifier Can you help me
with something?
B: Sure? What's the problem?
A: I'm not sure about the wire Do you think it's the
right length?
B: I think you should use a shorter wire
A: How much shorter?
B: I would cut maybe a centimeter or two off
A: I'll do that Thank you
I completed work order #23587 on December 13
This job took approximately two hours to
complete The amplifier was not working properly
due to the wiring The wire was about two
centimeters too long
1 0 Answer Key
-I replaced it with the right-sized wire The computer is now in working order I do not foresee any future problems
Unit 15
1 Suggested Answers
1 Kilo, giga, and mega are some prefixes of numbers
2 Giga is larger than mega
8 Suggested Answer
A: I finished reading your report earlier
B: Oh good What was your opinion?
A: I really liked it You did a good job
B: Thanks I spent a long time writing it
A: Let me give you some advice for writing your report next time
B: Okay Go ahead A: Try using the symbols instead of writing out those long numbers You'll save a lot of time
B: Can you give me an example?
A: "G" is the symbol for giga, or one billion B: That's a good idea I will definitely do that
9 Suggested Answer To: johnson.andrew@milleniumelectronics.net From: sanford.angie@milleniumelectronics.net Re: December Report
Hi Mr Johnson, Here is my report for December I wanted to thank you for giving me those suggestions about using
symbols for larger words My report did not take
as long to write this time
I will be doing some comparisons in my next report Would it be okay to make a table? I thought it would be easier to compare values that way Please let me know
Sincerely,
Angie Sanford
Trang 11r I
Unit 1
Employee (M): Thanks for calling Electronics Superstore
How can I help you today?
Customer (F): I want to order the Musicmaster JLX
stereo
Employee: Okay, great What else can I do for you?
Customer: I'd also like the speakers that go with it
Employee: Those are also on sale right now
Customer: Really? That's great! Can you give me the
Student (M): Excuse me, Professor Thompson I was
confused by some of the stuff you said today
Professor (F): Okay What were you confused about?
Student: Well, can you clarify what resistance is, please?
Professor: Of course Resistance is how much a material
opposes an electrical current
Student: Okay But how does it work, exactly?
Professor: Some materials are made up of insulators that
block current from passing through This blockage is
Experienced tech (F): Sure Go ahead
Apprentice tech: What is impedance? I don't really
understand it
Experienced Tech: No problem Impedance is a type of
measurement Are you with me so far?
Apprentice tech: Yes That part's fine But what does it
measure?
Experienced Tech: Basically, impedance measures the
amount that a circuit slows down the AC current
Does that make sense?
Apprentice tech: Actually, it does when you explain it
like that Thank you
Experienced Tech: You're welcome
Unit4
Apprentice (M): Hello, I'm Henry, the new apprentice I'll
be working with you
Professional (F): Hi, nice to meet you Do you have any
tools yet?
Audioscripts
Apprentice: Yes, I already have a flathead screwdriver
Professional: That's good, but you'll need a Phillips screwdriver, too
Apprentice: Okay, I'll get one Can you recommend a certain type?
Professional: Yes, I prefer the ones with rubber handles for a better grip
needlenose pliers
Professional: Great I really like Klein needlenose pliers for professional work
Unit 5 Clerk (F): Welcome to Classic City Electric Supply How may I help you?
Customer (M): Hi, I have a question What do I use to clean wires?
Clerk: A product with naphtha easily lifts dirt
Customer: What about an alcohol solution?
tubing, so I recommend naphtha It is used on many products
Customer: I didn't know that In that case, I need to purchase some naphtha
Clerk: It's a great cleanser It works really well on wiring projects
Customer: Great, thanks for your help
Unit6 Tutor (F): Is everything all right? Have you bonded your components together correctly?
Student (M): No, I've made a mistake I've melted some solder in the wrong place
Tutor: Don't worry Just use a desoldering tool to remove
it
Student: Oh really? I haven't used one before
Tutor: Well, this is a solder sucker
Student: How does it work?
Tutor: It has a vacuum pump inside Let me show you what to do
Student: Thanks for helping me out
Unit 7 Sales Rep (M): This is Ted at QMT Readings How may I help you?
Electronics Tech (F): Hi, I'm an electronics tech My company needs some more frequency counters
Sales Rep: You called at a good time We're running a special Frequency counters are twenty percent off right now
Electronics Tech: Great I need two counters with a range
of 0.01 Hz to 3.7 GHz What is the total cost?
Answer Key 11
Trang 12Audioscripts
Sales Rep: Each frequency counter is $375 The total for
both is $750
Electronics Tech: Does that price include shipping?
Sales Rep: Shipping is free
Electronics Tech: Great
UnitS
Customer (F): Hi, I'm looking for some items to set up
my new works pace
Employee (M): Okay, great What kind of work do you
do?
Customer: I repair electronics What do you recommend?
Employee: You should start with a workbench that is
sturdy and large enough
Customer: Okay, thanks And I will also need lighting
Employee: May I suggest a swing arm lamp for spot
lighting?
Customer: Good idea Is there anything else that I need?
Employee: Yes, power strips are also very important
Let's take a look at them
Unit9
Interviewer (F): So, why do you want to become our
senior electronics technician?
Applicant (M): Well, I have both experience and the
necessary education
Interviewer: Please tell me about your previous job duties
Applicant: I was part of a team that assembled and
tested models
Interviewer: Excellent Do you think of yourself as a team
player?
Applicant: Yes I work well with others But I am also
comfortable leading a team
Interviewer: Your references are great However, I do
have other candidates to interview
Applicant: I understand
Unit 10
New Tech (M): I've just started here What's the work like?
Experienced Tech (F): Pretty good It varies from job to
job
New Tech: What was your hardest job?
Experienced Tech: Once I spent six hours kneeling I
was doing repairs Bending and crouching can be
tough on the back sometimes, too
New Tech: I bet Do you have to carry a lot?
Experienced Tech: We rarely have to carry more than 30
pounds I remember one time the elevator didn't work
New Tech: What happened?
Experienced Tech: I had to carry 30 pounds up ten
flights of stairs! That was rough
12 Answer Key
Unit 11 Electronics Technician 1 (F): What's your ideal job setting?
Electronics Technician 2 (M): I think working outdoors
is the best, especially when the job is up high
Electronics Technician 1: Why do you like to do that?
Electronics Technician 2: I like being where I can see everything It's also very quiet
Electronics Technician 1: I don't think that sounds nice
at all I'm afraid of heights
Electronics Technician 2: Well, what kind of job setting
Apprentice (F): What's wrong?
Technician: You need to take off your jewelry If your silver ring touches any bare wires, you'll get a nasty shock
Apprentice: I thought silver was non-conductive
Technician: No! Silver is very conductive!
Apprentice: Oh, okay But I've already turned off the circuit,
so I can't get a shock
Technician: That doesn't matter Some parts retain an electrical charge even when the machine isn't connected to the power supply
Apprentice: Okay, thanks for the warning
Unit 13 Student (M): Hi, I'm planning to take your Math class in the Spring
Teacher (F): Good! Are you looking forward to it?
Student: Well, I'm wondering how often I will actually use math as an electronics technician
Teacher: Technicians use math a lot in their work You have to have basic math skills to be a good technician
Student: What are some basic math skills that I'd need
to know?
Teacher: It's important to know how to add decimals
Student: Oh, do technicians need to do that a lot in their work?
Teacher: Yes, they usually need to add measurements
of electronic parts
Unit 14 Experienced Tech (M): What are you working on?
Apprentice Tech (F): I'm just re-wiring this computer But
I have a question
Experienced Tech: What is it?
Trang 13n
Apprentice Tech: This wire seems to be a bit short Do
you think I should use a longer wire or just use this
one?
It'll work better
Experienced Tech: I would use one at least an inch or
two longer than the one you have now
Apprentice Tech: Okay, I'll do that Thanks for the help
Unit 15
your report
New Tech (F): What did you think of it?
Experienced Tech: I thought it was interesting and well
written
New Tech: Thank you I spent a few hours working on it
Experienced Tech: Let me give you a little tip for your
next report
numbers It will save you a good amount time
New Tech: Oh, I hadn't thought of that I'll definitely
remember to do that
Audioscripts
Trang 14Book 2 Answer Key
Unit 1
1 Suggested Answers
1 Physical stress, wearing out, corrosion, or damage
caused by a power surge are some causes of
Heat stress affects large machines because heat in
the power supply damages equipment Electrical
stress is caused by lightning and power surges
Physical stress comes from mistreating equipment
B: Excuse me, I brought my television here to be
fixed Is it ready yet?
A: Well, I'm afraid I have some bad news Your TV
has heat stress damage
B: What's that?
A: It's caused by heat from the power supply
B: What could have caused it?
A: Have you left your TV on for any long periods of
time?
B: Well yes, I went away for a long weekend and
forgot to turn it off It was on for four days
A: That'1I be what caused the damage
B: Really?
A: Yes You shouldn't put that much heat stress on
your electrical equipment
B: So, can you repair it?
A: I can repair it, it just needs some new components
9 Suggested Answer
Notes
Product: Television
Problem: There is heat stress damage Some
components are damaged
14 Answer Key
Probable cause: The television was probably switched
on for a long time
Suggestion: I can fix it, it just requires a few new components
1 manufacturer 3 age 5 in operation
B: It's Star The model is PL871
A: How old is it?
B: It's five years old I bought it second hand A: Did it stop working suddenly or gradually? B: I've been having problems with it for a while
A: I think it could just be normal wear and tear B: What should I do?
A: Bring it in and I'll see if I can fix it But you might need to buy a new PC
9 Suggested Answer Notes
Product: PC
Manufacturer: Star
Model: PL871
Age: 5 years
Trang 15How did it stop working? It has not been running
smoothly for a while
Suspected problem: I think the PC has normal wear
and tear
Suggested Action: I'll try to fix it, but the customer is
2 Scrambled images might appear on the screen of
To check whether the problem is a bad connection,
you can check if the device stops working after it
has warmed up
8 Suggested Answer
B: I'm just taking this tablet apart
the outside
screen?
computer chip
9 Suggested Answer
Instruction sheet for Evaluating malfunctioning
devices
DO NOT take the machine apart
Instead, do an external evaluation first
Ask yourself the following questions about the device:
1 Is there any activity? Do you hear a hiss or a hum?
2 Are there any scrambled words on the display?
3 Does the machine work better when you tap on it?
4 Does the device stop working after it warms up?
5 Is the remote control working correctly?
Unit4
1 Suggested Answers
2
1 The opposite of a closed circuit is an open circuit
2 A short circuit is one problem that can affect
circuits
5 Suggested Answer
The purpose of the course is to give students an introduction to electronics with a focus on circuit operations such as open and closed circuits, repairing circuits, and analyzing stages of a circuit
figure out the cause of the short circuit
circuit is open
suggest we do?
close the circuit
Answer Key 1 5
Trang 16Book 2 Answer Key
9 Suggested Answer
Short Circuit Notes
Problem: A short circuit
Assessment: The circuit was open There was a
component missing
Solution: We inserted the necessary component
This closed the circuit
2 Sine waves, square waves, and sawtooth waves
are some types of waves
5 duty cycle
Suggested Answer
Digital signals are based on binary code They are
easier to track and store than analog signals That is
why some people prefer digital signals
3 different types 6 at an angle
A: Look at this wave What do you think?
B: It seems like a pretty smooth signal
A: That's right What kind of wave do you think it is?
B: Is it a sine wave?
A: You got it Now look at this next one
B: Well, I see vertical lines Is it a sawtooth wave?
A: You're close, but actually it's a square wave
16 Answer Key
B: What's the difference?
A: A square wave has both straight vertical and horizontal lines A sawtooth wave has angled and straight, vertical lines
9 Suggested Answer Different types of waves Sine waves - form a smooth, flowing line
Sawtooth waves - are made up of angled and straight,
2 A capacitor's temperature range is one factor to consider when deciding what capacitor to use
Plastic capacitors work best in areas where moisture
is present They work well because they have a hard coating that keeps out water
B: Great, I'll take ten
A: Ok So that's ten 100 volt, PL0293, plastic capacitors
Trang 179 Suggested Answer
Simba Electronics
Product Order Form
Product description: Model PL0293, 100 volt,
1 microfarad plastic capacitor
1 Quartz is used in crystal resonators
2 A resonator is connected to a circuit board by its
A crystal has two leads while a resonator can have
either two or three
A: Hi, What can I do for you?
B: The clock on my DVD player doesn't work
A: My guess is a crystal inside is damaged
B: Is that serious?
A: Don't worry, I can fix it
B: Oh, good Will it take long?
A: No, "" have it working good as new by tomorrow
morning
B: Great Thanks
9 Suggested Answer
JD Electronics repair
Repair Ticket Number: 299040
Customer name: Joe Smith
What is the problem? Mr Smith's DVD player has a
broken clock
Repair procedure: Check the crystals on the circuit
board Replace any broken crystals Check the clock
Unit 8
1 Suggested Answers
2
1 Electricity flows into an anode
2 Light-emitting diodes are often used in remote controls
7 1 What do you think 4 bridge rectifier
2 has been exceeded
3 replacement part
8 Suggested Answer
5 power supply circuit
6 the part number
A: What do you think is wrong with the remote control? B: I don't know Maybe it's the diode
A: What do you think happened to the diode?
B: Sometimes they burn out or die from exceeding the PIV
A: We could look for a replacement on line
B: Okay, I think that's a good idea
A: Is this a double rectifier?
B: No, it's just a small diode
A: What is the part number? It's located near the band
B: The part number is DE69052
9 Suggested Answer Troubleshooting Guide for Your Remote Control
If your remote control stops working, it could be
the diode It might have died or become worn out
This can happen if the PIV was exceeded
For a replacement part, you can look online Be sure
to have the part number ready You can find it by locating the band
Trang 18Book 2 Answer Key
7 1 please give me 4 exactly the same
2 order a new fuse 5 Could you please
3 from a hardware store 6 slow-blow fuse
8 Suggested Answer
A: Hi, thanks for calling How can I help you?
B: I have a problem with my TV
A: Okay, when did you buy your TV?
B: I bought it last summer
A: And could you give me the brand and the model
name please?
B: Yes, it is a Subsonic, model CFV 2000
A: Alright, you're going to need a new fast -blow fuse
B: Can I order it from you now?
A: Sure, no problem
9 Suggested Answer
Employee Phone Script
Employee: Hello, thanks for calling How can I help
you today?
Customer: I have a problem with my TV
Employee: Okay, when did you purchase your product?
Customer: I bought it in May
Employee: Thanks, could you give me the brand and
model name, please?
Customer: Yes, it is a Subsonic, model CFV 2000
Unit 10
1 Suggested Answers
1 An LSI chip is one type of chip
2 A microscope is needed to closely examine a
Next stage: Production Stage Additional notes: The team on the project is doing
a great job; should be ready to start production within the next few days
Trang 19B: Could you help me replace a defective resistor?
B: Ok I think I found the problem This resistor isn't
limiting current correctly
oxide resistor
components Be sure to use diagonal cutters
9 Suggested Answer
TC Radio Repair
Work order number: 48950
Customer name: Joe Miller
Work performed: Identified defective resistor It did
not limit current correctly Removed defective resistor
with diagonal cutters Replaced it with a metal oxide
resistor
Unit 12
1 Suggested Answers
2
1 The shaft, wiper, terminals, and substrate are
some parts of a potentiometer
2 A potentiometer's resistance value is graphed on
a resistance curve
Book 2 Answer Key
5 Suggested Answer
6
Customers can click to find out more information
B: Hi, I need a potentiometer What would you recommend?
B: One hundred thousand ohms
A: I have an audio pot that meets that spec It sells for $2
B: I'll take it
9 Suggested Answer Topton Potentiometers Customer Service Survey Why did you contact Topton? I called to order a
How would you rate our customer service?
Please explain: The customer service representative was excellent He was very polite When I explained
He recommended an audio pot with one hundred
Thank you!
Unit 13
1 Suggested Answers
1 A relay is one kind of switch
2 A switch can be normally open or normally closed