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AURETR012 Test and repair basic electrical circuits
Assessment 1 – Questioning – Written Assessment
Student Name
Amarpreet Singh
Student ID Number
20210167
Unit Start Date
Unit End Date
Assessment Due Date
Date Submitted
29/11/2021
This cover sheet is to be completed by the student and assessor and used as a record to determine student
competency in this assessment task
The assessment process and tasks were fully explained.
Yes / No
I am aware of which evidence will be collected and how.
Yes / No
I am aware of my right to appeal an assessment decision.
Yes / No
I am aware that I can locate The RTO
Complaints and Appeals Policy and Procedure
on their website at (Insert Website Link)
Yes / No
I have discussed any additional educational support or reasonable adjustments I require in order to undertake this assessment with the Student Support Services Officer and Trainer / Assessor, (if applicable). e.g. Student Handbook
and Access and Equity Policy (Insert Website Link)
Yes / No
I have access to all required resources?
Yes / No
Cheating & Plagiarism Declaration
Student Declaration:
In accordance with The RTO
Plagiarism Policy, I hereby acknowledge by signing this declaration that I have not cheated or plagiarised any work regarding the assessment tasks undertaken in this unit of competency except where the work has been correctly acknowledged.
NOTE: Student must sign this prior to submitting their assessments to the assessor
Signature
Amarpreet Singh
Date:
29 /11/ 2021
Assessment Results
Satisfactory
or
Not Yet
Satisfactory
(Please circle the assessment result for this task)
Feedback to Student - Please provide general feedback on the Student’s performance Student Declaration: - I verify that the work completed is my own and that I was adequately informed of the assessment process prior to commencing this assessment task.
Assessor Declaration: - I verify that I have adequately explained and negotiated the assessment tasks with the
student prior to commencing assessment.
Document Name:
Student Written Knowledge Assessment – AURETR012
Created Date:
12
th
Aug 2019
Document No:
Trinity Institute (Australia) – AURETR012
Version No:
2.0
Last Modified Date:
Trinity Institute (Australia) | RTO Code:41310 | CRICOS Code: 03556F
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AURETR012 Test and repair basic electrical circuits
Student Name:
Amarpreet Singh
Assessor’s Name:
Student Signature
Amarpreet Singh
Date: 29/11/21
Assessor Signature
Date
Student Guide for Written Knowledge Assessment
Overview of Assessment This is a written assessment task you will be assess on your knowledge of testing and repairing basic electrical circuits.
The topics that will be covered in the assessment are:
1.
Prepare to test basic electrical circuit
2.
Test circuit
3.
Repair and check circuit
4.
Complete work processes
This assessment will ensure that the elements, performance criteria, performance evidence and knowledge evidence required, and conditions are adhered to demonstrate competency in this unit assessment task.
Read the assessment carefully before commencing.
Your Assessor will use the assessment criteria in this document and will provide feedback / comment.
You MUST
answer all the questions in the assessment tasks in your own words and
own handwriting.
This is an “Open Book” assessment, and students can use the resources listed in the “Resources Required” section below.
Task/s to be assessed
To complete this written assessment, you will need to answer the 69
questions comprising of Multiple Choice, True and False, Fill-in the Gap and Short Answer questions.
Time allowed
On average, the Assessment should take 4 – 6 hours to complete.
Location
This theory assessment will be completed in a classroom under the supervision of a trainer/assessor.
Decision making rules
To receive a ‘satisfactory’ outcome for this assessment students MUST
successfully answer
all questions. If a student achieves less than 100%, they can reattempt the assessment after further study has taken place. Students who cannot achieve a minimum of 100% you will not have satisfactorily completed this assessment
Your assessor will be looking for the following in this assessment task: -
Work health and safety (WHS) and occupational health and safety (OHS) requirements relating to testing and repairing basic electrical circuits, including procedures for:
‒
Using specialised tools and equipment
‒
Selecting and using personal protective equipment (PPE)
‒
Identifying hazards and controlling risks associated with wearing jewellery while working around electrical systems
Electrical principles, including:
‒
Current, voltage, resistance and power
Document Name:
Student Written Knowledge Assessment – AURETR012
Created Date:
12
th
Aug 2019
Document No:
Trinity Institute (Australia) – AURETR012
Version No:
2.0
Last Modified Date:
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AURETR012 Test and repair basic electrical circuits
‒
Series circuits
‒
Parallel circuits
‒
Series parallel circuits
‒
Ohm’s law
Key features of basic electrical circuit components, including:
‒
Cable types and sizes and current carrying capacity
‒
Circuit protection devices
‒
Switches
‒
Relays
‒
Automotive globes
Techniques for reading and interpreting technical information, including circuit types, diagrams and symbols
Procedures for using and operating electrical test equipment, including:
‒
Digital multimeters
‒
Test lights suitable for circuit testing, including resistive and light emitting diode (LED)
‒
Test probes suitable for testing circuit continuity
‒
Fused test lead
‒
Procedures for checking, identifying and isolating faulty equipment
Common types of faults, including:
‒
Open circuits
‒
High resistance circuits
‒
Short circuits
‒
Damaged insulation
‒
Frayed wires
‒
Burnt wiring
‒
Water and moisture ingress
‒
Connector damage
‒
Terminal damage
Testing procedures for electrical systems, including:
Accessing electrical terminals and using test probes without damaging connectors, fuse holders or wiring
‒
Electrical measuring and testing procedures, including:
Electrical resistance checks
Open and short circuit tests
Voltage drop tests
Current flow tests
‒
Visual testing procedures, including:
Component moisture ingress
Connector damage
Repair procedures for electrical circuits, including:
‒
Wire soldering procedures
‒
Terminal crimping procedures
‒
Replacing male and female terminals in a connector housing
‒
Connector removal and replacement procedures
‒
Basic electrical components removal and replacement procedures
Post-repair testing procedures, including:
‒
Confirming that electrical system is operating to manufacturer specifications
Confirming that no other problems are present as a result of the repair.
Assessment conditions
Assessors MUST
satisfy NVR/AQTF assessor requirements. Competency is to be assessed in the workplace or a simulated environment that accurately Document Name:
Student Written Knowledge Assessment – AURETR012
Created Date:
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th
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Document No:
Trinity Institute (Australia) – AURETR012
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AURETR012 Test and repair basic electrical circuits
reflects performance in a real workplace setting. Assessment MUST
include direct observation of tasks. Where assessment of competency includes third-party evidence, individuals MUST
provide evidence that links them to the basic electrical circuits they have tested and repaired, e.g. repair orders.
Assessors MUST
verify performance evidence through questioning on skills and knowledge to ensure correct interpretation and application. The following resources MUST
be made available:
Automotive repair workplace or simulated workplace
Workplace instructions
Manufacturer electrical system specifications
Vehicle or machinery with faults in the basic electrical circuits specified in the performance evidence
Electrical test equipment to test basic electrical circuits and components
Consumable materials relevant to repairing basic electrical circuits and components, including connectors, terminals, wire, electrical tape and heat shrink sleeving
Electrical repair tools, equipment and materials relating to basic electrical circuits and components. Resources required
Learning Resources available to students include:
Automotive Technology (A System Approach) 6
th
Edition – Chapters 6, 15, 16 & 20
Websites – Ohm’s law calculator http://www.sengpielaudio.com/calculator-ohmslaw.htm
Fluke 87 Multimeter http://media.fluke.com/documents/80v_____umeng0200.pdf
Trainer Handouts
Results/Re-
assessment
The Assessor will grade the assessment and record the result on the front page of this document (S) – Satisfactory if all observable behaviours are correct and (NS) not satisfactory if any areas are left incorrect
Feedback will be provided on either result
Where a student receives a ‘NS – Not Satisfactory’ result, the assessor will discuss the area of the non-compliant observable behaviour and an opportunity given for re-
assessment. This may be through direct observation or a different method of assessment e.g. verbal/oral questioning, problem solving exercise.
If the outcome is again not satisfactory the student result will be deemed (NYC) not yet competent. Additional feedback will be given, and a time agreed upon for further
assessment after additional training and skills practice has taken place, this information will be recorded, dated and signed in the re-assessment area on the last page of this document
Where all the assessment tasks have been graded (S) Satisfactory, the student will be deemed C – Competent for the practical component and the result recorded and signed in the area indicated on the last page of this document
Reasonable Adjustment
If the participant is unable to undertake the written assessment as designed, an interview (verbal questioning) may be used as an alternate approach.
Document Name:
Student Written Knowledge Assessment – AURETR012
Created Date:
12
th
Aug 2019
Document No:
Trinity Institute (Australia) – AURETR012
Version No:
2.0
Last Modified Date:
Trinity Institute (Australia) | RTO Code:41310 | CRICOS Code: 03556F
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AURETR012 Test and repair basic electrical circuits
Assessment 1 – Questioning
Written Assessment
1.
Identify five (5) important items of personal safety when testing and repairing basic electrical circuits.
1
Safety shoes
2
Skin protection
3
Safety gloves
4
Ear protection
5
Safety glasses
2.
Rings, necklaces, bracelets and watches should not be worn while working around electrical systems. Why?
Because they can be conducted with electricity
3.
Why should you NEVER use a test-light to diagnose components and wires in computer systems?
Computer system can be damage while using a test light because voltage applied directly to the terminals
4.
NEVER use a test light to probe for power in an electronic circuit. Why?
Test light damage the system components
5.
You should NEVER connect a ‘self-powered’ test-light to a circuit that is powered. Why?
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AURETR012 Test and repair basic electrical circuits
6.
Analogue meter cannot be used on a computer-controller circuit unless expressly directed to do so in the workshop manual. Why?
Analogue meter has needle when we use needle to move out, it damage the circuit
7.
Explain why the leads of an ammeter should NEVER be place the across the battery or a load. It put the circuit in the parallel position and it can cause to damage the meter
8.
Defined electrical principles of ‘Voltage’?
Voltage is the measurement of the pressure or force
9.
Describe electrical principles of ‘Current’?
Current is the measurement of the amount of flow.
10.
Describe electrical principles of ‘Resistance’?
Resistance is the measurement of the flow of electricity
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AURETR012 Test and repair basic electrical circuits
11.
Describe electrical principles of ‘Power’?
Power is the rate of doing electrical power
12.
What is a series circuit?
In series circuit resistor are arranged in a chain and the current is the same through each resistor
13.
Draw a series circuit with following electrical components symbols. 1 Battery, 1 switch, and 3 blubs/resistors
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AURETR012 Test and repair basic electrical circuits
14.
What is a parallel circuit?
In parallel circuit has two or more paths for the electricity to flow, and loads are parallel to each other
15.
Draw a parallel circuit with following electrical components symbols. 1 Battery, 1 switch, and 2 blubs/resistors
16.
What is a series parallel circuit?
In series parallel circuit all the components share the same voltage
17.
Draw a series parallel circuit with following electrical components symbols. 1 Battery, 1 switch, and 3 blubs/resistors
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Student Written Knowledge Assessment – AURETR012
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AURETR012 Test and repair basic electrical circuits
18.
Define Ohm’s law?
A pressure of one volte will cause one amp to flow through a conductor that has a resistance of one ohm
19.
Outline the formula used to calculate each of the following electrical units
Name
Formula Sign
Unit
Symbol
Voltage
V
Volts
V
Current
I
Amps
A
Resistance
R
Ohm
Ω
20.
Using Ohm’s law, work out the following basic formulas.
V = 2 Amps × 6 Ohms
12 Volts
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AURETR012 Test and repair basic electrical circuits
I = 12V ÷ 6R
2 Amps
R = 12V ÷ 4I
3 Ω
21.
In a clean, well-wired circuit, the fog lights will draw 2 amperes of current (below). What would happen if resistance in the circuit increases due to corroded or damaged wires or connections? If bad connections add
2 ohms of resistance to the circuit, the total resistance is? Using Ohm’s law, work out what total resistance is
“I”?
I =
12
=
3 Ω
I = 6 + 2
22.
Why are stranded copper wires used, instead of solid copper wire?
Because stranded wire is more flexible and has same cross section as compare to solid copper wire
23.
How is wire size determined?
By a wire diameter wire size can be determined
24.
In the AWG standard, what is the relationship between wire diameter and AWG size?
The AWG of a stranded wire is determined by the cross-sectional area of the equivalent solid conductor. Because there are also
small gaps between the strands, a stranded wire will always have a slightly larger small gaps between the strands, a stranded wire will always have a slightly larger overall diameter than a solid wire than the same AWG
25.
There are three (3) major factors that determine the proper size of wire to be used. What are they?
1
Working Voltage
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AURETR012 Test and repair basic electrical circuits
2
Determining the thickness of insulation
3
Current Carrying Capacity
26.
In most wiring colour codes, what do the first and second group of letters on the wiring diagram?
The first letter indicates the basic wire colour and the second letter indicate the colour of strip.
27.
What is the purpose of a circuit protection device? It protects the electrical circuit from damage cause by excess current from an overload
28.
Name four (4) common types of circuit protection devices and how each on works.
1
Fuse – it is essential electrical device used to protect the circuit from over current and it consists of
a metal strip that liquefies when the flow of current through it is high.
2
Circuit breaker- it is an electrical switch use to guard an electrical circuit against short circuit
otherwise an overload which will cause by excess current supply.
3 Poly switch – it is also called resettable fuse and it is a passive electronic component used for
protecting electronic circuit from over current mistake.
ESD Protection- this device protects an electrical circuit from an electrostatic discharge, in order
to avoid a breakdown of a device.
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AURETR012 Test and repair basic electrical circuits
3
29.
Name the different types of vehicle fuses?
A.
Glass Cartage
D.
Mini Fuse
B.
Ceramic
E.
Maxi fuse
C.
Blade fuse
F.
F Type fuse
30.
What does a switch control?
A switch control is a component which allow control over current flow in a circuit. When the switch is closed,
current flows and led can illuminate.
31.
In a single-pole, single-throw switch, what does the ‘pole’ and ‘throw’ refer to?
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AURETR012 Test and repair basic electrical circuits
Pole refer to the number of separate circuit that the switch control and switch control just one circuit.
Throw refer to different output connection each switch pole connect its input to. In single throw switch is
32.
What is a relay?
It is an electrically operated switch. It has a set of input terminals for a single or multiple control signals and
set of operating contact terminals
33.
Why is a relay used in a circuit?
Because it takes a less power to operate the relay coil, it can be used to control motors, heaters,
lamps, or ac circuit which can draw a lot more electrical power.
34.
Name the following automotive globes.
Single filament
Festoom globe
Number plate
Double filament
Cap less
Instrument panel
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AURETR012 Test and repair basic electrical circuits
HID light
LED gloves
Halogen globes
35.
Name the parts of the globe below.
1
Envelopes
2
Filaments
3
Caps
4
Terminals
5
Index pins
36.
What is a wiring diagram and what kind of information is provided?
It shows the components of the circuit like shapes, power and signal connection between devices. It gives the
information to the worker to understand electrical symbols to be able to read wiring diagram.
37.
Explain the purpose of the Component Locator (Configuration Diagrams)?
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AURETR012 Test and repair basic electrical circuits
It describes the organisation and wiring of the physical component in a system and drawn to help model
implementation details and double check of the system’s required function is covered by planned development
38.
Name the following electrical symbols that you would find to wiring diagram.
Positive
Negative
Battery
Ground
Fuse
Circuit Breaker
Resistor
Variable Resistor
Potentiometer
Bulb
Double
Filaments Bulb
Male Terminal
Female Terminal
Splice joint
Connector
Overlap
Coils winding
Coils steel
Diode
Zener Diode
LED Light
Capacitors
Motor
39.
Circle the following components in this wiring diagram. (Fuse, Globes, Switch, Ground) Document Name:
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AURETR012 Test and repair basic electrical circuits
40.
What can Digital Multimeter measure?
Digital multimeter can measure the electrical values of voltage, current and resistance
41.
On the Digital Multimeter below, name each part.
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AURETR012 Test and repair basic electrical circuits
1. Display Hold
2. Manual range
3. Recording
4. Toggle Button
5. Back light
6. Rotary Switch
7. Volts, Ohms, diodes check,
input terminal
8. Common Terminal
9. Milliamp
10. Ammeter
1
Digital display
2
Continuity beeper
3
Relative reading
4
Frequency and duty cycle
5
Diode test
6
Capacitance
7
Milliamps ac.dc
8
Resistance
9
Micro amps ac.dc
10
Millivolts dc
11
Volts dc
42.
Explain what ‘High Impedance’ means in regard to digital multimeters?
High impedance means that a point in a circuit allows a small amount of current through, per unit of applied voltage at that point.
43.
When checking for voltage in a vehicle circuit, how is the digital multimeter connected?
Digital multimeter must be connected in parallel in a circuit in order to measure voltage
44.
How is digital multimeter connected when measuring resistance?
When measuring the resistance the digital multimeter connected through the paths between the test leads probes
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AURETR012 Test and repair basic electrical circuits
45.
Explain how the digital multimeter checks for resistance in a circuit or electrical component?
Zero ohms mean the open circuit and ammeter will not show any deflection
46.
What does ‘Zero Ohms’ mean on the scale?
OL display open loop in digital multimeter and it means there is no continuity or path for electric current
47.
What does ‘OL’ when displayed on the digital multimeter?
It is measured in the unit of the Ampere, simply called “Amp,” (A). The most common way to measure current
in a circuit is to break the circuit open and insert an “ammeter” in series (in-line) with the circuit so that all
48.
When measuring amperes, how is the digital multimeter connected into the circuit being tested?
It protects the computer circuit from the overload that can be caused by a standard test light because it gives
very low additional load to the circuit.
49.
High-impedance test-lights are safe to use on computer circuits. Why?
It protects the computer circuit from the overload that can be caused by a standard test light because it gives
very low additional load to the circuit.
50.
Explain the how to use a logic probe?
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AURETR012 Test and repair basic electrical circuits
1. Connect the black clip to ground or to a common line of the circuit to be tested.
2. Connect the red clip to or leave the positive supply to the circuit.
3. Select the logic family CMOS OR TTL
.
4. Use the probe to connect the required monitoring points.
51.
What is a continuity test-light and how does it operate?
Continuity test light verifies that current will flow in an electrical circuit by observing a light buzzer in series
with the circuit actuates or quantitatively, using a multimeter to measure the resistance between the endpoint
52.
Why is it recommended that install a fuse to test leads or jumper wire?
To provide protection against voltage spikes because wire overheat and melting
53.
Isolation procedures in each workplace may vary in detail because of differences in workplace, power sources, hazards and processes. However, an isolation procedure should include the following basic steps in every case.
1
The hazardous areas covered by the guard cannot operate until the guard is closed.
2
If the guard is opened while hazardous plant functions are operating,
3
The interlocking system incorporates 'run-down' guards that close and lock and remain
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AURETR012 Test and repair basic electrical circuits
4
When the guard is closed, the hazardous machine functions covered by the guard can
5
The interlocking system is designed to be 'fail safe'.
6
Block parts in hydraulic and pneumatic systems that could move from the loss of pressure
7
Dissipate extreme cold or heat, or provide protective clothingerrrrwerrrrwd
54.
Define each of the following term:
Open: An open circuit will not operate as the circuit is not complete. Current cannot run from the battery, to
And through the component and back again
Short: A short circuit (sometimes abbreviated to short or s/c) is an electrical circuit that allows a current to Travel measured, a common return path for electric current, or a direct physical connection to the earth.
Grounds: In electrical engineering, ground or earth is the reference point in an electrical circuit from which voltages are measured
Excessive resistance: If a circuit has excessive resistance, it prevents the wire or component from carrying sufficient current under high load conditions. Resistance can be caused by corrosion, loose wiring pins, pitted relay contacts, and other types of physical damage
55.
If the wiring insulation was damaged, frayed or burnt, what kind of fault could this cause? Worn, frayed, or damaged insulation around any wire or other conductor is an electrical hazard because the
conductors could be exposed. Contact with an exposed wire could cause a shock. Damaged insulation could
cause a short, leading to arcing or a fire.
56.
What faults should you visually inspect for on wiring and connectors?
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AURETR012 Test and repair basic electrical circuits
Wires
: Cable faults are damage to cables which effect a resistance in the cable. If allowed to persist, this can lead to a voltage breakdown. There are different types of cable faults, which must first be classified before they can be located
Connectors:
While a connector element determines the normal path of flow execution, a fault connector is executed at runtime only when its source element results in an error. A fault connector can have any target element but only the following source elements: Apex Plug-In.
57.
Often testing electrical circuits requires the technician to use backprobing tools to probe a connector to allow a
test lead to contact a terminal inside the connector. Why?
Because connector housings are so tight it is impossible to probe any other way. In addition some connectors
are watertight. So sometimes even that isn’t possible. It all depends on the circumstances. Sometimes
adapters are necessary with probe points such as on military type connectors that are water tight. This type
connector even has seals around the body of the connector that cannot be broken without damaging the
integrity of the connector. Thus an adapter is necessary for troubleshooting with a test contact for each wire
involved. When this happens it becomes the responsibility of engineering to have such adapters made with
a
58.
How do you measure for resistance in an electrical circuit or component?
The most common and simplest way to measure resistance is with a digital multimeter, or DMM.
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AURETR012 Test and repair basic electrical circuits
59.
How do you test for an ‘Open’ circuit?
Maintain the first test probe at the hot wire terminal of the circuit and remove the second probe from neutral
terminal then place it on ground or earth terminal for the circuit.
60.
How do you test for a ‘Short’ circuit?
The test is conducted on the high voltage side of the transformer and the low voltage side or the secondary
is
short circuit. A wattmeter is connected to the primary and ammeter is connected in series with the primary
winding.
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AURETR012 Test and repair basic electrical circuits
61.
Explain the procedure for carrying out a ‘voltage test’.
Turn the dial to volts.
Then insert the black lead in com jack.
Next insert the red lead into the vΩ jack.
Connect the test lead to the circuit: black lead first, then red lead.
62.
Describe the ways to carry out a ‘current flow test’.
The most common way to measure current in a circuit is to break the circuit open and insert an ammeter in
series with the circuit so that all electrons following through the circuit and also through meter
The most common way to measure current in a circuit is to break the circuit open and insert an ammeter in
63.
What is the procedure for soldiering electrical wire together?
Wire can be bound or twisted together to make solider join easier.
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AURETR012 Test and repair basic electrical circuits
Make sure the iron is hot before use.
Use shrink wrap to seal the connection
64.
Why is heat shrink used?
It is used to insulate wires, environmental protection for standard and solid wire conductors, connections,
joints and terminals in electrical work.
65.
Explain how a crimpled connection is made, or a crimp terminal attached?
crimp terminal attached by inserting the stripped end of wire into a portion of the connector and then
mechanically deformed by compressing it tightly around the wire.
66.
How is the male and female terminals removed and replaced in a multipin connector? crimp terminal attached by inserting the stripped end of wire into a portion of the connector and then
mechanically deformed by compressing it tightly around the wire.
67.
When replacing basic electrical components such as headlight bulb, what care is needed?
Remove the components according to manufacturer’s procedure.
Disconnect the battery.
Disconnect wiring to the components.
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AURETR012 Test and repair basic electrical circuits
68.
After the replacing the headlight bulb, why is it important to correctly fit the rear cap?
It prevents your headlamp housing from being filled up with dirt or be misted up. We suggest you neither take
down the heat sink to get the LED headlight bulb fit in headlamp housing nor to leave the dust cover off in
order to use the led headlight bulb
69.
Why is it important to verify that the vehicle you have repaired is operating correctly?
While it's crucial to check the structural repair of your vehicle for safety, it's also important to check that the
quality of paintwork and replacement parts is of a high standard (e.g. original parts). If not, then it can affect
the car's value upon resale.
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