AURTTF006 - Diagnose and repair petrol carburettor systems
Assessor Resource
AURTTF006 Diagnose and repair petrol carburettor systems
Assessment tool
Version 1.0 Issue Date: April 2024
This unit describes the performance outcomes required to diagnose and repair faults in the petrol carburettor systems of vehicles. It involves preparing for the task, selecting the correct diagnostic procedure, carrying out the diagnosis and the repair, performing post-repair testing, and completing workplace processes and documentation.
It applies to those working in the automotive service and repair industry. The petrol carburettor systems include those in agricultural machinery, heavy commercial vehicles, light vehicles, marine vessels, mobile plant machinery, motorcycles or outdoor power equipment. The unit does not apply to the electronic control of petrol fuel systems.
No licensing, legislative, regulatory or certification requirements apply to this unit at the time of publication.
You may want to include more information here about the target group and the purpose of the assessments (eg formative, summative, recognition)
Evidence Required
List the assessment methods to be used and the context and resources required for assessment. Copy and paste the relevant sections from the evidence guide below and then re-write these in plain English.
Elements
Elements describe the essential outcomes.
Performance Criteria
Performance criteria describe the performance needed to demonstrate achievement of the element. Where bold and italicised text is used, further information is detailed in the range of conditions section.
1. Prepare to diagnose and repair petrol carburettor system
1.1 Job requirements are determined from workplace instructions
1.2 Diagnostic information is sourced and interpreted
1.3 Diagnostic options are analysed and those most appropriate to the circumstances are selected
1.4 Hazards associated with the work are identified and risks are managed
1.5 Diagnostic tools and equipment are selected and checked for serviceability
2. Diagnose petrol carburettor system
2.1 Diagnostic tests are carried out according to workplace procedures, and safety and environmental requirements
2.2 Faults are identified from diagnostic test results and causes of faults are determined
2.3 Diagnosis findings are reported according to workplace procedures, including recommendations for necessary repairs or adjustments
3. Repair petrol carburettor system
3.1 Repair information is sourced and interpreted
3.2 Repair options are analysed and those most appropriate to the circumstances are selected
3.3 Repair tools, equipment and materials are selected and checked
3.4 Repairs and component replacements and adjustments are carried out according to manufacturer specifications, workplace procedures, and safety and environmental requirements, and without causing damage to components or system
3.5 Post-repair testing is carried out according to workplace procedures to confirm fault rectification, and any further problems detected as having been introduced during the repair process are rectified
4. Complete work processes
4.1 Final inspection is made to ensure work is to workplace expectations and system or vehicle is presented ready for use
4.2 Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected
4.3 Tools and equipment are checked and stored according to workplace procedures
4.4 Workplace documentation is processed according to workplace procedures
Before competency can be determined, individuals must demonstrate they can perform the following according to the standards defined in this unit’s elements, performance criteria, range of conditions and foundation skills:
diagnose and repair a fault in three of the following different petrol carburettor systems fitted to different vehicles or engines:
one type of variable venturi carburettor
one type of multi-barrel carburettor
one simple carburettor.
Individuals must be able to demonstrate knowledge of:
work health and safety (WHS) and occupational health and safety (OHS) requirements relating to diagnosing and repairing petrol carburettor systems, including procedures for working with flammable petrol fuel
environmental requirements, including procedures for trapping, storing and disposing of fluids released from fuel systems
operating principles of petrol carburettor systems and associated components, including:
fuel atomisation
air-fuel ratios and combustion cycles
detonation and pre-ignition
venturi action
application, purpose and operation of petrol carburettor systems and components, including:
carburettor systems, including:
float system
idle system
fast idle system
main system
choke system
power system
accelerating system
single barrel carburettor operation, including:
mixture correction, including air-bleed, compensating jet, and metering rod mixture correction
manual and automatic choke operation
multi-barrel carburettors, including:
two-barrel and four-barrel carburettors
two-stage carburettors, including vacuum and mechanical control of second stage
diagnostic testing procedures for petrol carburettor systems, including:
fuel pump pressure, volume and vacuum testing
air-leak testing
cold-start enrichment testing
exhaust gas analysis
repair procedures for petrol carburettor systems, including procedures for:
installing fuel pumps
dismantling, cleaning, repairing and reassembling carburettors
removing, replacing and adjusting carburettors
post-repair testing procedures for petrol carburettor systems.
Assessors must satisfy NVR/AQTF assessor requirements.
Competency is to be assessed in the workplace or a simulated environment that accurately 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 carburettors that they have worked on, 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 vehicle petrol carburettor system specifications
three different vehicles or engines with faults in the petrol carburettor systems specified in the performance evidence
diagnostic equipment for petrol carburettor systems, including an exhaust gas analyser,
tools, equipment and materials appropriate for repairing petrol carburettor systems.
Submission Requirements
List each assessment task's title, type (eg project, observation/demonstration, essay, assingnment, checklist) and due date here
Assessment task 1: [title] Due date:
(add new lines for each of the assessment tasks)
Assessment Tasks
Copy and paste from the following data to produce each assessment task. Write these in plain English and spell out how, when and where the task is to be carried out, under what conditions, and what resources are needed. Include guidelines about how well the candidate has to perform a task for it to be judged satisfactory.
Elements
Elements describe the essential outcomes.
Performance Criteria
Performance criteria describe the performance needed to demonstrate achievement of the element. Where bold and italicised text is used, further information is detailed in the range of conditions section.
1. Prepare to diagnose and repair petrol carburettor system
1.1 Job requirements are determined from workplace instructions
1.2 Diagnostic information is sourced and interpreted
1.3 Diagnostic options are analysed and those most appropriate to the circumstances are selected
1.4 Hazards associated with the work are identified and risks are managed
1.5 Diagnostic tools and equipment are selected and checked for serviceability
2. Diagnose petrol carburettor system
2.1 Diagnostic tests are carried out according to workplace procedures, and safety and environmental requirements
2.2 Faults are identified from diagnostic test results and causes of faults are determined
2.3 Diagnosis findings are reported according to workplace procedures, including recommendations for necessary repairs or adjustments
3. Repair petrol carburettor system
3.1 Repair information is sourced and interpreted
3.2 Repair options are analysed and those most appropriate to the circumstances are selected
3.3 Repair tools, equipment and materials are selected and checked
3.4 Repairs and component replacements and adjustments are carried out according to manufacturer specifications, workplace procedures, and safety and environmental requirements, and without causing damage to components or system
3.5 Post-repair testing is carried out according to workplace procedures to confirm fault rectification, and any further problems detected as having been introduced during the repair process are rectified
4. Complete work processes
4.1 Final inspection is made to ensure work is to workplace expectations and system or vehicle is presented ready for use
4.2 Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected
4.3 Tools and equipment are checked and stored according to workplace procedures
4.4 Workplace documentation is processed according to workplace procedures
This section specifies work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included. Bold italicised wording, if used in the performance criteria, is detailed below.
Safety and environmental requirements must include:
work health and safety (WHS) and occupational health and safety (OHS) requirements, including procedures for working with flammable petrol fuel
environmental requirements, including procedures for trapping, storing and disposing of fluids released from fuel systems.
Before competency can be determined, individuals must demonstrate they can perform the following according to the standards defined in this unit’s elements, performance criteria, range of conditions and foundation skills:
diagnose and repair a fault in three of the following different petrol carburettor systems fitted to different vehicles or engines:
one type of variable venturi carburettor
one type of multi-barrel carburettor
one simple carburettor.
Individuals must be able to demonstrate knowledge of:
work health and safety (WHS) and occupational health and safety (OHS) requirements relating to diagnosing and repairing petrol carburettor systems, including procedures for working with flammable petrol fuel
environmental requirements, including procedures for trapping, storing and disposing of fluids released from fuel systems
operating principles of petrol carburettor systems and associated components, including:
fuel atomisation
air-fuel ratios and combustion cycles
detonation and pre-ignition
venturi action
application, purpose and operation of petrol carburettor systems and components, including:
carburettor systems, including:
float system
idle system
fast idle system
main system
choke system
power system
accelerating system
single barrel carburettor operation, including:
mixture correction, including air-bleed, compensating jet, and metering rod mixture correction
manual and automatic choke operation
multi-barrel carburettors, including:
two-barrel and four-barrel carburettors
two-stage carburettors, including vacuum and mechanical control of second stage
diagnostic testing procedures for petrol carburettor systems, including:
fuel pump pressure, volume and vacuum testing
air-leak testing
cold-start enrichment testing
exhaust gas analysis
repair procedures for petrol carburettor systems, including procedures for:
installing fuel pumps
dismantling, cleaning, repairing and reassembling carburettors
removing, replacing and adjusting carburettors
post-repair testing procedures for petrol carburettor systems.
Assessors must satisfy NVR/AQTF assessor requirements.
Competency is to be assessed in the workplace or a simulated environment that accurately 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 carburettors that they have worked on, 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 vehicle petrol carburettor system specifications
three different vehicles or engines with faults in the petrol carburettor systems specified in the performance evidence
diagnostic equipment for petrol carburettor systems, including an exhaust gas analyser,
tools, equipment and materials appropriate for repairing petrol carburettor systems.
Copy and paste from the following performance criteria to create an observation checklist for each task. When you have finished writing your assessment tool every one of these must have been addressed, preferably several times in a variety of contexts. To ensure this occurs download the assessment matrix for the unit; enter each assessment task as a column header and place check marks against each performance criteria that task addresses.
Observation Checklist
Tasks to be observed according to workplace/college/TAFE policy and procedures, relevant legislation and Codes of Practice
Yes
No
Comments/feedback
Job requirements are determined from workplace instructions
Diagnostic information is sourced and interpreted
Diagnostic options are analysed and those most appropriate to the circumstances are selected
Hazards associated with the work are identified and risks are managed
Diagnostic tools and equipment are selected and checked for serviceability
Diagnostic tests are carried out according to workplace procedures, and safety and environmental requirements
Faults are identified from diagnostic test results and causes of faults are determined
Diagnosis findings are reported according to workplace procedures, including recommendations for necessary repairs or adjustments
Repair information is sourced and interpreted
Repair options are analysed and those most appropriate to the circumstances are selected
Repair tools, equipment and materials are selected and checked
Repairs and component replacements and adjustments are carried out according to manufacturer specifications, workplace procedures, and safety and environmental requirements, and without causing damage to components or system
Post-repair testing is carried out according to workplace procedures to confirm fault rectification, and any further problems detected as having been introduced during the repair process are rectified
Final inspection is made to ensure work is to workplace expectations and system or vehicle is presented ready for use
Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected
Tools and equipment are checked and stored according to workplace procedures
Workplace documentation is processed according to workplace procedures
Job requirements are determined from workplace instructions
Diagnostic information is sourced and interpreted
Diagnostic options are analysed and those most appropriate to the circumstances are selected
Hazards associated with the work are identified and risks are managed
Diagnostic tools and equipment are selected and checked for serviceability
Diagnostic tests are carried out according to workplace procedures, and safety and environmental requirements
Faults are identified from diagnostic test results and causes of faults are determined
Diagnosis findings are reported according to workplace procedures, including recommendations for necessary repairs or adjustments
Repair information is sourced and interpreted
Repair options are analysed and those most appropriate to the circumstances are selected
Repair tools, equipment and materials are selected and checked
Repairs and component replacements and adjustments are carried out according to manufacturer specifications, workplace procedures, and safety and environmental requirements, and without causing damage to components or system
Post-repair testing is carried out according to workplace procedures to confirm fault rectification, and any further problems detected as having been introduced during the repair process are rectified
Final inspection is made to ensure work is to workplace expectations and system or vehicle is presented ready for use
Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected
Tools and equipment are checked and stored according to workplace procedures
Workplace documentation is processed according to workplace procedures
Forms
Assessment Cover Sheet
AURTTF006 - Diagnose and repair petrol carburettor systems
Assessment task 1: [title]
Student name:
Student ID:
I declare that the assessment tasks submitted for this unit are my own work.
Student signature:
Result: Competent Not yet competent
Feedback to student
Assessor name:
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Date:
Assessment Record Sheet
AURTTF006 - Diagnose and repair petrol carburettor systems
Student name:
Student ID:
Assessment task 1: [title] Result: Competent Not yet competent
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Feedback to student:
Overall assessment result: Competent Not yet competent