AURTTZ002 Diagnose and repair exhaust systems

AURTTZ002 Diagnose and repair exhaust systems :

Assessment 1 – Questioning – Written Assessment
Student Name			Student ID Number
Unit Start Date			Unit End Date
Assessment Due Date			Date Submitted
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 Procedureon 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				Date:	______ / ______ / 20______

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.
Student Name:			Assessor’s Name:
Student Signature		Date	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 diagnosing and repairing exhaust systems. The topics that will be covered in the assessment are: Prepare to diagnose and repair exhaust systemsDiagnose an exhaust systemRepair an exhaust systemComplete 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 51 questions comprising of Multiple Choice, True and False, Fill-in the Gap and Short Answer questions.
Time allowed	On average, the Assessment should take 2 – 4 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 diagnosing and repairing exhaust systems, including procedures for working with hot components and exhaust systems producing toxic gasesOperating principles of features of exhaust systems and associated components, including scavenging and back pressureApplication, purpose and operation of exhaust systems and components, including:MufflersExtractor pipesCatalytic convertersDiesel particulate filtersDiagnostic testing procedures for exhaust systems, including:Exhaust leak testingVibration and noise locating proceduresBack pressure testingRepair procedures for exhaust systems, including procedures for removing, replacing and aligning componentsPost-repair testing procedures for exhaust systems.
Assessment conditions	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 exhaust systems 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 exhaust system specificationsTwo different vehicles with faults in the exhaust system components specified in the performance evidenceDiagnostic equipment for exhaust systems Tools, equipment and materials appropriate for repairing exhaust systems, including metal heating equipment.
Resources required	Learning Resources available to students include: Automotive Technology (A System Approach) 6th Edition – Chapters 5, 6, 7, 32 and 33WebsitesTrainer 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 incorrectFeedback will be provided on either resultWhere 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 documentWhere 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.

Assessment 1 – Questioning

Written Assessment

1. Identify five (5) important items of personal safety when diagnosing and repairing exhaust systems.

True or False question

• When inspecting or working on the exhaust system, remember that its components get very hot when the engine is running. Contact with them could cause a severe burn. Also, always wear safety glasses or goggles when working under a vehicle?

True

or

False

• What are the three (3) functions of the exhaust system?

True or False question

• Some exhaust systems are designed with extractor pipes. These have one pipe for each exhaust port. The pipes are designed with long sweeps that prevent back pressure. They also provide a scavenging effect, which assists in extracting the exhaust gases from the cylinders, thereby increasing engine performance.

True

or

False

• Name the twelve [12] components of the exhaust system below.

• What materials are exhaust pipes typically made from?

• What is the function of the exhaust flex joint?

True or False question

• The exhaust manifold collects the burnt gases as they are expelled from the cylinders and directs them to the exhaust pipe.

True

or

False

Multiple Choice question. Selected the correct answer.

• Which of the following is NOT a metal used for producing exhaust manifolds?

1. Cast iron.
2. Aluminium.
3. Heavy-gauge sheet metal.
4. Stainless steel.

True or False question

1. The tailpipe is the last pipe in the exhaust system. It releases the exhaust fumes into the atmosphere beyond the back end of the car.

True

or

False

1. Heat shields are used to?

True or False question

1. Heat shields are usually made of pressed or perforated sheet metal.

True

or

False

True or False question

1. Heat shields trap the heat in the exhaust system, which has a direct effect on maintaining exhaust gas velocity.

True

or

False

1. Describe the construction of a muffler.

True or False question

1. Two types commonly used are the reverse-flow and the straight-through mufflers.

True

or

False

1. What are the two (2) benefits of using aluminised and stainless steel in muffler construction?

True or False question

1. Many cars use a double-wall exhaust pipe to better contain the sound and reduce pipe ring.

True

or

False

True or False question

1. Many mufflers are produced with drain holes drilled into them to allow condensation to drip out.

True

or

False

1. On some older vehicles, there is an additional muffler, known as?

True or False question

• The largest performance gain from using an exhaust headers is that it increases the engine’s volumetric efficiency.

True

or

False

• Explain how exhaust headers increase the engine’s volumetric efficiency?

• Describe the main purpose of a catalytic converter.

True or False question

• A catalytic converter breaks down HC and CO to relatively harmless by-products.

True

or

False

True or False question

• OBD-II regulation call for a monitoring system that looks at the effectiveness of the catalytic converter.

True

or

False

• Name the four [4] parts of the catalytic converter below.

True or False question

• A catalytic converter is part of the exhaust system and a very important part of the emission control system.

True

or

False

True or False question

• A catalytic converter contains a ceramic element coated with a catalyst.

True

or

False

True or False question

• A catalyst is a substance that causes a chemical reaction in other elements without actually becoming part of the chemical change and without being used up or consumed in the process.

True

or

False

True or False question

• Regeneration can be passive or active.

True

or

False

• The diesel particulate filter is fitted with a sensor that measures exhaust backpressure. How does this operate?

True or False question

• Exhaust leaks are often identified by sound, although very small leaks can be difficult to locate.

True

or

False

• What is the most effective ways to identify the source of an exhaust leak?

True or False question

• Most parts of the exhaust system, particularly the exhaust pipe, muffler, and tailpipe, are subject to rust, corrosion, and cracking.

True

or

False

True or False question

• Broken or loose clamps and hangers can allow parts to separate or hit the road as the car moves causing vibrations.

True

or

False

True or False question

• Excessive exhaust noise from the tailpipe can be due to a muffler or resonator in which the baffles have corroded so that they are no longer effective. 

True

or

False

True or False question

• A restricted exhaust can be tested with an exhaust pressure gauge.

True

or

False

Multiple Choice question. Selected the correct answer.

• A restricted exhaust system can cause ______.

1. Stalling.
2. Loss of power.
3. Backfiring.
4. All answers are correct.

True or False question

• Before replacing an exhaust system component, soaks all old connections with a penetrating oil.

True

or

False

True or False question

• Checks the old system’s routing for critical clearance points before replacing an exhaust system component.

True

or

False

True or False question

• Most exhaust work involves the replacement of parts. When replacing exhaust parts, make sure the new parts are exact replacements for the original parts. Doing this will ensure proper fit and alignment as well as ensure acceptable noise levels.

True

or

False

• Exhaust system component replacement might require the use of special tools. Name eight (8) special tools.

True or False question

• When installing exhaust gaskets, carefully follow the recommendations on the gasket package label and instruction forms.

True

or

False

True or False question

• To replace an exhaust manifold gasket, follow the torque sequence in reverse to loosen each bolt. Repeat the process to remove the bolts. Doing this minimizes the chance that components will warp.

True

or

False

• Consider the various post repair checks that you would make during a road test exhaust system?

Multiple Choice question. Selected the correct answer.

• Which source of information will give you the most detail about diagnosing and repairing exhaust systems on the vehicle you are working on?

1. Workshop manual.
2. Owner’s manual.
3. Google.
4. Textbooks.

• Why is it very important that the Job Card is completed correctly?

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