This assessment resource supports the unit of competency MEM05004 Perform routine oxy acetylene welding

Transcription

1 Perform routine oxy acetylene welding This assessment resource supports the unit of competency MEM05004 Perform routine oxy acetylene welding

2 These materials were developed by Manufacturing Skills Australia. Manufacturing Skills Australia With the exception of any material protected by a trade mark and where otherwise noted, all material presented in this document is provided under a Creative Commons Attribution-No Derivative Works 3.0 Australia licence. Disclaimer This work is the result of consultations with Australian industry participants. It is a collaborative view and does not necessarily represent the view of Manufacturing Skills Australia or any specific body. For the sake of brevity it may omit factors which could be pertinent in particular cases. While care has been taken in the preparation of this material, Manufacturing Skills Australia and the original developer do not warrant that any licensing or registration requirements specified here are either complete or up-to-date for your State or Territory. Manufacturing Skills Australia and the original developer do not accept any liability for any damage or loss (including indirect and consequential loss) incurred by any person as a result of relying on the information contained in this material. Manufacturing Skills Australia, does not accept any liability to any person for the information or advice (or the use of such information or advice) which is provided in this material or incorporated into it by reference. The information is provided on the basis that all persons accessing this material undertake responsibility for assessing the relevance and accuracy of its content. No liability is accepted for any information or services which may appear in any other format. No responsibility is taken for any information or services which may appear on any linked websites. Published by: Manufacturing Skills Australia Release Date: October 2010 For further information about this resource or any other work being undertaken by Manufacturing Skills Australia (MSA), please visit: Manufacturing Skills Australia Level 3, 104 Mount Street North Sydney NSW 2060 T: F: E: info@mskills.org.au W: NOTE: This resource is not considered to be a definitive manual and must be contextualised and amended to suit end user requirements. Manufacturing Skills Australia Page 2

3 Overview This unit covers preparing materials and performing routine oxy acetylene welding. This unit applies in a maintenance or manufacturing environment where the welding is not required to meet an Australian standard or equivalent. Fillet and butt welds would typically be performed on low carbon/mild steels. All work and work practices must be undertaken to regulatory and legislative requirements. It is applicable in both a learning and assessment pathway and an assessment only pathway. This competence is performed in the context that all materials and equipment needed to carry out this function have been provided, including learning materials, learning programs and learning resources. Elements To achieve competency in this unit you must demonstrate your ability to: 1. Identify weld requirements; 2. Prepare materials for welding; 3. Prepare equipment for welding; and 4. Perform routine welding using oxy acetylene. Manufacturing Skills Australia Page 3

4 Assessment In order to found competent in this unit you must competently complete all or some of the following Assessment tasks Method of Assessment Task 1 Task 2 Task 3 Task 4 Task 5 Written Short Answer Questions Practical Observation Report Third Party/Supervisor Report Indirect Evidence Note: There may be more assessment methods listed here than what is necessary to determine Competence. It is the individual RTO s decision to determine the methods that best suit their delivery arrangements and list them in their Training & Assessment Strategy in addition to removing those methods that are not required from this document Assessment Mapping Element Performance Criteria Written Short answer questions Practical Observation Third Party Report 1 Identify weld requirements 1.1 Weld requirements are identified from job instructions Location of welds is identified in accordance with standard operating procedures and job specifications Prepare materials for welding 2.1 Materials are cleaned and prepared ready for welding Prepare equipment for welding 3.1 Welding equipment is set up correctly. 1,2 3.2 Settings and consumables are selected. 3, Manufacturing Skills Australia Page 4

5 4.1 Safe welding practices are applied. 7, Perform routine welding using oxy acetylene 4.2 Materials are welded to job requirements Welds are cleaned in accordance with standard operating procedures Required Skills and Knowledge Mapping Written Short answer questions Practical Observation Third Party Report Skills Preparing materials 1,5 Setting up welding equipment 1,4,6 Welding with oxy acetylene fuel gas 3,5,8, 10 Reading and interpreting routine information on written job instructions, specifications and standard operating procedures 13,14 Following oral instructions Using measurement skills for joint preparation and routine oxy acetylene welding 9 Knowledge Preparatory requirements 15 Materials and consumables properties and characteristics 7 Equipment and equipment settings 1 Fuel gas properties and applications 5 Post welding treatments 16 Manufacturing Skills Australia Page 5

6 Weld characteristics 7,10,11 Any applicable industry standards, NOHSC guides, State/Territory regulatory codes of practice/standards Safe work practices and procedures 2,16 Safe welding practices 9,12,13, 14 Use and application of personal protective equipment for routine oxy acetylene welding 16 Manufacturing Skills Australia Page 6

7 Assessment Preparation Checklist Unit/s of Competency Perform routine oxy acetylene welding Candidate Name RTO Assessor Name Has the assessment process been explained to you and that to achieve a successful outcome for this unit of Competency you must be deemed Satisfactory in all assessment tasks? Yes No As the candidate are you ready for assessment? Yes No Do you understand The Recognition of Prior Learning (RPL) process? Yes No Do you understand which evidence is to be collected and how? Yes No Do you understand your rights and the appeal system? Yes No Have you discussed any special needs that should be considered during the assessment process? Yes No Do you require an adjustment to the conduct of the assessment to respond to a specific or a special need? e.g. Cultural, Language, Disability, Literacy or Numeracy purposes. Yes No I agree to undertake this assessment in the knowledge that the information gathered will only be used for the purpose of determining my skills as Satisfactory or Not Satisfactory for each assessment method. Additionally the information gathered is for the determination of my Competency by the collection of all assessment evidence for this unit of competency and can only be accessed by my workplace supervisor, my RTO and nominated regulatory authorities. Candidate Signature Assessor Signature Date Date Manufacturing Skills Australia Page 7

8 Written Short Answer Questions To be applied after the completion of formal information presentation methods It is suggested that this method be applied in a classroom or similar learning environment These questions can be used orally where needed but it is necessary to record the candidate responses Unit/s of Competency Perform routine oxy acetylene welding Candidate Name RTO Assessor Name Overview This unit covers preparing materials and performing routine oxy acetylene welding in a maintenance or manufacturing environment where the welding is not required to meet an Australian standard or equivalent. Fillet and butt welds would typically be performed on low carbon/mild steels. All work and work practices must be undertaken to regulatory and legislative requirements. It is applicable in both a learning and assessment pathway and an assessment only pathway. Instructions This assessment method is one (1) of several assessment tasks that you will be set for the determination of your success for this unit of competency. You will be provided time to complete this assessment and all written work must be submitted by the date allocated by your trainer/assessor; you are free to work on your submission in your own time and also you are free to use whatever resources you consider appropriate for the task. As the candidate you must have been notified that an assessment is to be conducted, ensuring that you are fully aware of Competency Based Training and assessment and that you have adequate time to prepare. Please notify your trainer/assessor if you feel you have not had adequate time to prepare for this assessment. The evidence required to demonstrate competency in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria of this unit and include demonstration of some or all of the application in this assessment method by applying: Your demonstrated competency in this unit means you must be able to prepare materials and carry out routine oxy acetylene welding. Please write your answers on a separate sheet of paper Please put your name and unit title at the top of the page Manufacturing Skills Australia Page 8

9 Question One Which gas; oxygen or acetylene, when used in excessive quantities tends to cause a backfire? Question Two If you wanted to develop an acetylene manifold delivery system; what type of piping can t you use and why? Question Three How can acetylene cylinders be easily distinguished from oxygen cylinders? Question Four Manufacturers tend to make changes to welding wire, within specifications, for what reason? Question Five Regarding the materials that can be welded what are now and what were considered to be the limitations of oxyacetylene welding? Question Six When must filler metal be added to a lap joint? Question Seven When discussing a primary and secondary oxyacetylene flame which statement is true? a. The secondary flame produces more heat but the temperature is lower; b. The primary flame produces more heat and but he temperature is higher; c. The secondary flame produces less heat but higher temperatures,; d. The primary flame produces less heat and less temperature. Question Eight What simple method can be used to create a heat sink to keep the molten weld pool narrow, with little penetration and high build up? Question Nine What is the advantage of bending a hook onto one end of a filler rod? Manufacturing Skills Australia Page 9

10 Question Ten What will happen if the secondary flame is suddenly moved away from a molten weld pool? Question Eleven What purpose is flux used for in the oxyacetylene welding process? Question Twelve What can be an indicator of temperature change as the weld progresses? Question Thirteen Explain the term ferrous metal and what flux is assists in gaining the best result? Question Fourteen What protects the molten weld pool during the welding process? Question Fifteen Why must heat be directed more at the bottom piece of material in a lap joint? Feedback: Written Short Answer Questions Result for Assessment: Satisfactory (S) Not Satisfactory (NS) Candidate Signature: Date: RTO Assessor Signature: Date: Manufacturing Skills Australia Page 10