ISAT ARM L3 2014-15
Contents
1. 7 Describe the difference between a sliding mesh and a Constant mesh gearbox 8 Explain the operation of a synchromesh unit when 3rd gear is selected TOTAL 5 30 INSTRUCTIONS FOR TASK 2 Dismantle and Assemble a 5 speed Manual Gearbox Sub Activity 2 Time Mark task Allocation Allocation 1 Prepare the work area and follow safety procedures for working on gearboxes Obtain the appropriate hand tools and 20 min 8 equipment 2 Use a service manual to obtain manufacturer s specifications Mount the gearbox safely and 24 min 9 remove the drain plug and drain the oil 3 Perform a visual inspection on the gearbox and do all the pre checks Remove bell housing 52 min 20 inspection cover and extension housing 4 hRemove the main shaft input and cluster gear Dis assemble the gearbox completely and lay out parts in a parts tray Clean and 63 min 25 examine the condition of the parts 5 Compile and submit a condition report on the parts and replace the faulty parts 63 min 25 6 Start to assemble the gears on the main shaft Install cluster gear main shaft input shaft and all other parts and assemble the rest of the 63 min 25 gearbox according to manufacture specifications 7 Operate the gear lever to test if all gears can be selected this include the reverse gear 20 min 8 Complete relevant documentation to record 8 Restoring the work area Clean the tools and return it f Clean the special tools and e2. Do all the pre checks Remove following Bell housing Inspection cover Extension housing NW WOW W W W TO RW C Remove the following Main shaft Input Cluster gear Dismantle the rest of the gearbox completely Lay out parts in a parts tray Clean and examine the condition of the parts Prepare a condition report on the parts Replace the faulty parts Start to assemble the gears on the main shaft Install the following Cluster gear Main shaft Input shaft Assemble the rest of the gearbox a Noal a aana a Operate the gear lever to see if all gears can be selected Complete relevant documentation to record repairs that was done on the gearbox 01 O1 C1 C1 C1 Restoring the work area Clean the work area and discard waste material Clean the tools and store it away Clean the special tools and equipment and return it to the store Co Co
3. performance to inspect and dis An adequate performance to inspect and dis Little or no performance to inspect and dis relevant parts for assemble assemble assemble assemble wear gearbox was gearbox was gearbox was gearbox was performed performed performed performed Max 20 marks 16 20marks 11 15 marks 10marks 0 9 marks Compile and All of the correct Most of the Sufficient steps None of the damage parts Max 25 marks steps to replace the parts were followed 19 25 marks correct steps to replace the parts were followed 13 18 marks replace parts were followed 12 marks Submit a condition steps were correct steps were followed correct steps report followed were followed were followed Max 25 marks 19 25 marks 13 18 marks 12 marks 0 12 mark Replace worn or All the correct Most of the Sufficient steps to None of the correct steps to replace parts were followed 0 12 marks Assemble the gearbox according to manufacture specifications Max 25 marks All the correct steps to assemble the parts were followed 19 25 marks Most of the correct steps to assemble the parts were followed 13 18 marks Sufficient steps to assemble the parts were followed 12 marks None of the correct steps were followed to assemble the parts 0 12 marks Max 10 marks steps to restore wor
4. Recommended gearbox oil 5 3 2 Oil seals 5 3 3 Gaskets 5 4 TOOLS EQUIPMENT 5 4 1 Appropriate hand tools 5 4 2 Workshop manuals 5 4 3 Parts Tray 5 5 SPECIAL EQUIPMENT 6 Assessment Tools 5 5 1 Dial gauge 5 5 2 Feeler gauge 5 5 3 Torque wrench 5 5 4 Pre load gauge or Pull scale e A separate Marking Guideline is provided for activity ONE which the assessor should use to assess the student s performance in the task This Marking Guideline must NOT be handed to students n Task TWO the student s performance should be measured using the Rubric and a Checklist provided These assessment tools should NOT be made available to the students before or during the task SECTION 2 INSTRUCTIONS TO ASSESSOR 1 Study the ISAT as described in SECTION 1 2 Arrange a pre assessment interview with the students to inform them of the date s time s and venue of the ISAT Also inform them about the requirements and conditions for the ISAT Students also need to be aware of what is expected of them during the ISAT Students need to be made aware that the ISAT will be conducted under strict examination conditions 3 ALL safety practices and procedures must be adhered to 4 The assessment centre should comply with the assessment standards 5 All equipment used must be good clean and in a safe working order 6 All tools vehicle data and safety equipment should be readily available to the student befor
5. e Reverse idler gear 1 1 1 e Reverse gear 1 e Synchro sleeve 1 e Synchro hub 1 e Main shaft 1 Max 6 Question 6 e Reverse idler gear 1 Question 7 e Ina sliding mesh gearbox the gears on the output shaft can slide from side to side in order to engage the gears on the lay shaft 1 e n a constant mesh gearbox all the gears on the output shaft are constantly in mesh with their corresponding gears on the lay shaft 1 Question 8 When the driver shifts gears the synchronizer sleeve slides on its splined hub towards the selected output gear The synchro ring rubs on the side of the third gear cone 1 Friction causes the speed of the gear synchronizer and output shaft to eventually turn at the same speed 1 When the speed of the three components is the same the synchro sleeve can slide completely over the synchro ring and over the dog teeth on the output gear 1 This locks the output gear to the synchronizer hub and to the main shaft 1 Torque is then transmitted to the output gear and the output shaft to the drive shaft and the wheels 1 TOTAL 30 TASK 2 Checklist for rubric Dismantle and Assemble a 5 speed Manuel gearbox 1 Prepare the work area Obtain the appropriate hand tools and special tools Obtain the correct equipment Obtain a service manual Mount the gearbox and follow safety procedures Remove drain plug and drain oil Perform a visual inspection on the gearbox
6. e and during assessment 7 Students must protect themselves with the necessary Personal Protective Equipment PPE No student will be allowed to start the ISAT without PPE 8 All waste must be discarded according to the Occupational Health and Safety Act OHSA 9 The assessor must intervene to protect the students from any unsafe act that could lead to injury and damage to property 10 The assessor should monitor the students conduct during the assessment It is important that the assessor must ensure that the ISAT be carried out according to the examination rules 11 ALL documents must be signed by the student and the assessor 12 The duration of the task is 6 hours 5hours 30 min 30 min which is divided according to the instruction sheet to the student for the different activities 13 SECTION 3 contains the Assessment Tool for Task 2 which is a Rubric The Rubric should be handed to students prior the conduct of the ISAT See the separate Marking Guideline for possible responses to Task 1 and the checklist for Task 2 14 A separate Marking Guideline checklist is provided which the assessor should use in conjunction with the Rubric in order to assess the student s performance This Marking Guideline must NOT be handed to students before conducting the ISAT 15 To calculate the final mark you need to add the scores of each sub task in the rubric to the theoretical questions The total marks need to be converted to a perc
7. entage The total marks are 160 30 130 for the complete ISAT 16 Students must be given the Instruction to Students contains an instruction sheet which describes to them what needs to be done 17 Student performance in the ISAT must conclude with a record of the student s performance as provided for in SECTION 4 SECTION 3 ASSESSMENT TOOLS TASK 1 see Marking Guideline provided in a separate document TASK 2 Rubric also see CHECKLIST in Marking Guideline provided in a separate document Perform Repairs on 5 Speed Manual Gearboxes Level 4 Level 3 Level 2 Level 1 uc E Assessment Outstanding Highly Competent Not Yet e 2 o Criteria Competent Competent 6 O 1 Prepare the work All of the work Most of the work Adequate work Little or no work area according to site procedures site procedures site procedures site procedures work site were followed were followed were followed were followed procedures correctly correctly correctly Max 8 marks 8 marks 5 7 marks 4 marks 0 3 marks 2 Use a manual to All relevant Most of the Sufficient service Service manual identify the information in service manual manual information not manufactures service manual was used information used used specifications was used Max 9 marks 8 9 marks 5 7 marks 4 marks 0 4 marks Dis assemble the gearbox and inspect all Outstanding performance to inspect and dis High level
8. higher education amp training i Department Higher Education and Training 8 REPUBLIC OF SOUTH AFRICA e ae MS NATIONAL CERTIFICATE VOCATIONAL NQF LEVEL 3 INTEGRATED Summative Assessment Task SUBJECT ISAT AUTOMOTIVE REPAIR AND MAINTENANCE 2014 2015 This document consists of 11 pages SECTION 1 INTRODUCTION 1 Practical purpose and value of the ISAT to the workplace This ISAT is a practical task that draws on the student s cumulative learning throughout the year and being acquainted with the needs of the industry A checklist and a rubric are used as a tool to evaluate student s performance The focus of this ISAT is not only to assess whether students can successfully perform each specific activity in the task but also to determine whether they can integrate and apply their knowledge and skills in performing a world of work task The purpose of the ISAT is also to afford students the opportunity to demonstrate creativity innovation and problem solving skills The competence of the student is measured against the assessment criteria prescribed in the Subject andthe Assessment Guidelines of 2014 This ISAT emanates from Topic 12 of the Level 3 Automotive Repair and Maintenance curriculum of 2014 The ISAT should take place in a real life work based situation and must be executed under strict exam conditions The ISAT consist of activities which can be done in stages throughout
9. k area were followed 9 10 marks correct steps to restore work area were followed 6 8 marks restore work area were followed 5 marks Complete relevant All the correct Most of the Sufficient steps to None of the documentation steps to complete correct steps to complete correct steps and record repairs documents were complete documents were were followed to followed documents were followed complete followed documents Max 8 marks 8 marks 5 7 marks 4 marks 0 3 marks Restore work area All the correct Most of the Sufficient steps to None of the correct steps were followed to restore work area 0 4 marks 10 SECTION 4 RECORD OF PERFORMANCE INTEGRATED SUMMATIVE ASSESSMENT TASK AUTOMOTIVE REPAIR AND MAINTENANCE LEVEL 3 College Campus Student s Surname and First Name s Student s ID Number Assessor s Surname and Initials Date of conclusion of assessment ASSESSMENT GRID MARK STUDENT S ALLOCATION MARK SCORED TASK 1 Functioning and Operation of a 5 Speed Manual gearbox 30 TASK 2 Dismantle and Assemble a 5 Speed Manual 130 gearbox TOTAL 160 PERCENTAGE ACHIEVED 926 5 Point Achievement Rating Scale 5 4 2 1 80 100 70 79 50 69 40 49 0 39 Competency Level Indicators Rating Code Rating Marks 5 Outstanding 80 100 4 Highly Com
10. onsult a service manual and adhere to manufacturers specifications Ensure that you comply with ALL the instructions of the assessor Conduct all tasks according to safe working workshop procedures Clean the work area and discard waste material according to the Occupational Health and Safety Act OHSA Your performance in each of the activities will be assessed by means of a rubric The lecturer will use the rubric in conjunction with the checklist provided to mark your ISAT 10 Write and submit a condition report on the work done for all sub tasks to assist you to arrive at a conclusion about the condition of the gearbox 10 1 You need to mention in your report what corrective action needs to be taken to solve the problems 10 2 This report should also include findings and recommendations 10 3 You also need to complete relevant documentation to record repairs QUESTIONS FOR TASK 1 1 Name the TWO common types of gears in a gearbox and explain TWO advantages and TWO disadvantages of each 2 Explain the relationship between gear ratio and torque 3 The first gear ratio is normally 3 8 1 Calculate the fifth gear ratio if a driving gear rotates at a speed of 3750 rpm and a driven gear rotates at a speed of 5000 rpm 4 Name FIVE functions of a gearbox 5 Explain the power flow in a gearbox when the reverse gear is selected 6 Which gear is responsible for changing the direction reverse of rotation in the gearbox
11. petent 70 79 3 Competent 50 69 2 Not Yet Competent 40 49 1 Not Achieved 0 39 Student s competence level Student s signature Lecturer s signature Date and Time of 11 sc py higher education amp training Department N y Higher Education and Training Sd REPUBLIC OF SOUTH AFRICA IS i p NATIONAL CERTIFICATE VOCATIONAL NQF LEVEL 3 NG INSTRUCTIONS TO STUDENTS SD SUBJECT ISAT AUTOMOTIVE REPAIR AND MAINTENANCE LEVEL 3 2014 2015 This document consists of 4 pages INSTRUCTIONS TO STUDENTS This ISAT consists of a practical 130 marks and theoretical 30 marks task This task tests your ability to apply the knowledge and skills acquired in the subject Automotive Repair and Maintenance The work required of you in this Integrated Summative Assessment Task ISAT is an important and compulsory task that adds up to a total of 160 marks This task will be carried out under examination conditions You are required to 1 Ensure that you are punctual 2 Ensure that you are wearing suitable Personal Protective Equipment PPE Follow all safety precautions when carrying out the task Note You will be prevented from continuing the task unless you rectify the mistakes as advised by the lecturer REMEMBER SAFETY FIRST Identify and select appropriate hand tools and equipment to meet the requirements of the task C
12. quipment and return 25 min 10 it to the store TOTAL 330 min 130 x higher education v amp training i Department y Higher Education and Training QAQ REPUBLIC OF SOUTH AFRICA S NATIONAL CERTIFICATE VOCATIONAL NQF LEVEL 3 MARKING GUIDELINES SUBJECT ISAT AUTOMOTIVE REPAIR AND MAINTENANCE 2014 2015 This document consists of 5 pages TASK 1 Question 1 Spur Gear e Advantages o Mechanical efficiency is high o Cheap to manufacture o Reduce side thrust Any two responses e Disadvantages o Gears are noisy o Requires considerable skill to change Helical Gear e Advantages o Provide greater tooth contact o Operate quieter e Disadvantages o More expensive o Cannot slide easily into mesh Question 2 2X 2 X4 2 X4 2 X 4 e Gear ratio is the speed of the input shaft to the speed of the output shaft 1 e Torque A big gear will have a slow speed and a high torque and vice versa Question 3 e Gear Ratio Speed of driving gear Speed of Driven gear e Gear Ratio 3750 rpm 5000 rpm e Gear Ratio 0 75 1 1 Question 4 e Provide permanent neutral e Allows vehicle to operate satisfactorily when climbing an incline 1 1 e Enable the engine torque to increase 1 e Provide a forward and reverse gear 1 1 e Increase the leverage over the driving shaft Question 5 e Power flows from the input shaft e Through the cluster gear
13. rescribed time The total duration to complete both activities is 6 hours The time duration includes the preparing and restoring of the work area Parts that are serviceable can be used again After completion of the task the student needs to demonstrate the selection of all the gears including the reverse gear This is to test the operation of the gearbox and to ensure that all gears can be selected This test must be conducted under the supervision of the assessor ISAT overview This ISAT consists of TWO activities The first activity consists of EIGHT theoretical questions which have a total of 30 marks The second activity consists of EIGHT sub tasks which add up to a total 130 marks Task Activity Time Mark Allocation Allocation 1 Functioning and Operation of a 5 speed 30 min 30 Manual gearbox front or rear wheel drive 2 Dismantle and Assemble a 5 speed Manual 5 hours 130 gearbox 30 min TOTAL 6 hours 160 5 Resource requirements 5 1 INFRASTRUCTURE 5 1 1 A workshop that complies with all safety regulations 5 1 2 A well equipped workshop with the appropriate equipment 5 2 MATERIALS CONSUMABLES 5 2 1 Cleaning materials 5 2 2 Container in which to drain the lubricant 5 2 3 Waste bins and brooms 5 2 4 Waste cloth 5 2 5 Clipboard and suitable writing material to write a report 5 3 PARTS SAME PARTS CAN BE USED IF IT IS IN A GOOD WORKING CONDITION 5 3 1
14. the year 2 Scope of the ISAT Topic 12 Maintenance and Repair of Driveline and Related Components Subject Outcome 12 1 Functioning and Operation of a 5 Speed Manual gearbox Learning Outcomes e Explain different types of gears in a gearbox e Explain the functioning of a gearbox e Explain the relationship between gear ratio and torque e Explain the different types of gear lever arrangement e Describe the different types of gearboxes e Explain the power flow through different gears in a gearbox Subject Outcome 12 2 Perform Repairs on a Front or Rear Wheel drive 5 Speed Manual Gearbox Learning Outcomes Perform safety procedures when working on gearboxes Use a manual to acquire the manufacture s specifications Dismantle strip the gearbox and inspect all relevant parts for wear Compile and submit a condition report Replace worn or damage parts Assemble the gearbox according to manufacturer s specifications Complete relevant documentation to record repairs Task Descriptions Activity ONE requires that the student must answer all 8 theoretical questions which total 30 marks and the duration is 30 minutes Activity TWO requires the student to dismantle and assemble the gearbox This activity is worth 130 marks and must be completed within 5 hours 30 minutes This activity must be carried out on a 5 speed front or rear wheel drive gearbox The student must be able to complete all the 8 sub tasks in the p
Download Pdf Manuals
Related Search