Mechanical Technology PAT GR 12 2019 Eng

Downloaded from hlayiso.com MECHANICAL TECHNOLOGY PRACTICAL ASSESSMENT TASKS (PAT) GRADE 12 2019 These guidelines consist of 75 pages. Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 2 DBE/PAT 2019 NSC TABLE OF CONTENTS PAGE 1. INTRODUCTION/BACKGROUND 3 2. TEACHER GUIDELINES 4 2.1 Administration of PAT 4 2.2 Assessment of PAT 4 2.3 Moderation of PAT 4 2.4 Consequences of absence/non-submission of tasks 4 2.5 Declaration of authenticity 5 3. LEARNER GUIDELINES 6 Instructions to the learner 6 4. SPECIALISATION 7 SECTION A: FITTING AND MACHINING 7 SECTION B: AUTOMOTIVE 17 SECTION C: WELDING AND METALWORK 49 5. CONCLUSION 76 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 3 DBE/PAT 2019 NSC 1. INTRODUCTION/BACKGROUND The 17 Curriculum and Assessment Policy Statements subjects which contain a practical component all include a practical assessment task (PAT). These subjects are: • AGRICULTURE: Agricultural Management Practices, Agricultural Technology • ARTS: Dance Studies, Design, Dramatic Arts, Music, Visual Arts • SCIENCES: Computer Applications Technology, Information Technology, Technical Sciences • SERVICES: Consumer Studies, Hospitality Studies, Tourism • TECHNOLOGY: MECHANICALTECHNOLOGY, Civil Technology, Electrical Technology, and Engineering Graphics and Design A practical assessment task (PAT) mark is a compulsory component of the final promotion mark for all candidates offering subjects that have a practical component and counts 25% (100 marks) of the end-of-year examination mark. The PAT is implemented across the first three terms of the school year. This is broken down into different phases or a series of smaller activities that make up the PAT. The PAT allows for learners to be assessed on a regular basis during the school year and it also allows for the assessment of skills that cannot be assessed in a written format, e.g. test or examination. It is therefore important that schools ensure that all learners complete the practical assessment tasks within the stipulated period to ensure that learners are resulted at the end of the school year. The planning and execution of the PAT differs from subject to subject. The PAT allows the teacher to directly and systematically observe applied competence. The PAT comprises the application/performance of the knowledge, skills and values particular to that subject and counts 25% of the total promotion/certification mark out of 400 for the subject. The PAT is implemented across the first three terms of the school year. Any profession requires of its members a thorough grounding in both theory and practice and MECHANICAL TECHNOLOGY is no exception. It is emphasized that the goal of the practical assessment task is to produce a skilled learner in each specialisation field. A nation's true wealth is in its manpower and education that should aim to develop the talents of a learner so that he/she can contribute to the well-being of the society by using and developing scientific and technological resources. To prepare a learner in MECHANICAL TECHNOLOGY'S specialisation fields, one must focus on the following: • An attitude where the learner can selectively use ideas, gather evidence and facts, to drawing logical conclusions to put them to good use creatively and with imagination; • A capability to express ideas and information clearly by speech, writing, drawing and manufacturing and • A willingness and capability to accept and exercise responsibility, to make decisions, and to learn by experience. Attributes such as these cannot all be achieved in a classroom. A sound knowledge of engineering sciences is essential to equip the MECHANICAL TECHNOLOGY learner with the necessary practical capabilities for the required processes. Practical training is the application of acquiring essential skills to bridge between trade theory and practice. Practical application in the workshop must therefore be made an interesting and challenging experience to develop the learner physically and mentally. The learner must show his/her initiative, curiosity and persistence in learning. In order to stimulate and develop self-confidence the granting of some degree of responsibility during the practical application is very important. Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 4 DBE/PAT 2019 NSC 2. TEACHER GUIDELINES 2.1 Administration of the PAT Teachers are requested to make copies of the different specialisation PAT documents. These documents need to be handed out to the learners at the beginning of the year. The Practical Assessment Task for Grade 12 is externally set, internally assessed and externally moderated. Teachers must attach due dates for the different facets of the PAT (refer to the CAPS document). In this manner, learners can easily assess their progress. Instances where formal assessments take place, it is the responsibility of the teacher to administer assessment. The PAT should be completed within the first three terms. The PAT should be completed under controlled conditions (refer to Mechanical Technology SPECIALISATION: CAPS Grade 10 – 12). 2.2 Assessment of PAT Frequent and developmental feedback is needed to ensure necessary guidance and support to the learner. Both formal and informal assessment should be conducted to ensure that the embedded skills are developed. Informal assessment can be conducted only to monitor progress of the learner. Formal assessment should always be conducted and recorded by the teacher. 2.3 Moderation of PAT The tasks, projects, assessment criteria as well as the mark sheets must be presented to the moderator during moderation of the PAT. The moderator should be able to call on a learner to explain and demonstrate the functions, principles and skills during the moderation purposes. Upon completion the moderator will, if necessary, adjust the marks of the group up or downwards depending on the decision reached as a result of moderation. 2.4 Consequences of absence/non-submission of tasks. If a learners' practical assessment task is incomplete or unavailable with valid reason, the learner may be given three weeks before the commencement of the final end-of-year examination to submit the outstanding task. Should the learner fail to fulfill the outstanding PAT requirement, such a learner will be awarded a zero mark for that PAT component. A learner's results are regarded as incomplete if he/she does not offer any component of the PAT task. He/she will be given another opportunity based on the decision of the Head of the assessment body. Should the learner fail to fulfill the outstanding PAT requirement, the marks for these components will be omitted and the final mark for Mechanical Technology will be adjusted for promotion purposes in terms of the completed tasks. Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 5 DBE/PAT 2019 NSC 2.5 DECLARATION OF AUTHENTICITY NAME OF THE SCHOOL: NAME OF LEARNER: (FULL NAME(S) AND SURNAME) NAME OF TEACHER: I hereby declare that the project submitted for assessment is my own, original work and has not been previously submitted for moderation. SIGNATURE OF CANDIDATE DATE As far as I know, the above declaration by the candidate is true and I accept that the work offered is his or her own. SIGNATURE OF TEACHER DATE SCHOOL STAMP Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 6 DBE/PAT 2019 NSC 3. LEARNER GUIDELINES Instructions to the learner • The practical assessment task (PAT) consists of a specialisation task in Fitting and Machining, Automotive and Welding and Metalwork. The practical work is spread over three terms, as set out in each of the specialisation areas. (See CAPS document.) • All tasks must be completed according to the time frames set out in each of the tasks. • Learners are requested to actively engage in all practical assessment tasks. • Learners who are uncooperative will receive demerits or a zero mark for that particular section of the work. • Learners, who act unsafely in the workshop and place other learners in danger, will be given additional corrective tasks to improve their safety awareness. Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 7 DBE/PAT 2019 NSC 4. PRACTICAL ASSESSMENT GUIDELINES PER SPECIALISATION: SECTION A: FITTING AND MACHINING (SPECIFIC) Term: 1 to 3 Start date: January 2019 Completion date: August 2019 The following standards must be achieved: • All sizes must be within the given tolerance. • There must be no damage to tools and equipment. • All appropriate safety procedures must be adhered to. • The project must be well presented. TASK A1: CANNON RESOURCES REQUIRED FOR PAT: CANNON Consumable materials and safety equipment required per learner Any appropriate material like mild steel, Length/ Quantity No. of Total Part brass, aluminium, Width per learner learner quantity bright steel Barrel Ø25 – Round bar 178 1 Wheels Ø76 – Round bar 20 2 Frame sides 3 mm sheet metal 210 x 80 2 Frame spacer Ø12 – Round bar 46 1 top Frame spacer Ø12 – Round bar 46 1 bottom Frame spacer Ø12– Round bar 56 1 barrel Spacer bushes Ø12 – Round bar 10,5 2 Axle Ø12 – Round bar 112 1 Bolts (Allen 6 M6 10 round head) (3 x 2 sides) NOTE: This material list is NOT a cutting list. The teacher must determine and create the cutting list. Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 8 DBE/PAT 2019 NSC CANNON – COMPOSITE VIEW Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 9 DBE/PAT 2019 NSC FIGURE A 1.1: BARREL FIGURE A1.2: WHEEL Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 10 DBE/PAT 2019 NSC FIGURE A1.3: FRAME SIDES Procedure: Frame 1. Use graphic paper with a 10 mm grid and redraw the shape onto the paper. 2. The width of the paper is 210 mm which equals the length of the frame. 3. Cut the shape of the frame out and paste it onto the sheet metal with glue. 4. Use a prick punch and scriber to etch the shape of the frame on the sheet metal. 5. Use a hacksaw and file to cut the shape and finish the frame off. FIGURE A1.4: AXLE SHAFT FIGURE A1.5: BARREL SHAFT Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 11 DBE/PAT 2019 NSC FIGURE A1.6: THICK SPACER – Bottom of frame FIGURE A1.7: THIN SPACER – Top of frame FIGURE A1.8: BUSH-BARREL Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 12 DBE/PAT 2019 NSC MECHANICAL TECHNOLOGY FITTING AND MACHINING MARK SHEET – BARREL (FIGURE A1.1) GRADE 12 DATE PROJECT CANNON LEARNERS FACETS MARKS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Facing and centre 5 hole Length 175 mm 5 Ø22 mm 10 Ø16 mm 10 Ø23 mm 10 Front taper 15 Rear taper 10 Hole Ø8 5 Finish 5 TOTAL 75 SIGNATURE OF TEACHER SIGNATURE OF SUBJECT HEAD Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 13 DBE/PAT 2019 NSC MECHANICAL TECHNOLOGY FITTING AND MACHINING MARK SHEET – WHEELS (FIGURE A1.2) GRADE 12 DATE PROJECT CANNON LEARNERS FACETS MARKS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Ø70 10 Ø of recess 10 Ø20 10 Ø15 10 Length 12 mm 5 6 x holes 10 Ø (own choice) Finish 5 TOTAL 60 SIGNATURE OF TEACHER SIGNATURE OF SUBJECT HEAD Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 14 DBE/PAT 2019 NSC MECHANICAL TECHNOLOGY FITTING AND MACHINING MARK SHEET – FRAME SIDES (FIGURE A1.3) GRADE 12 DATE PROJECT CANNON LEARNERS FACETS MARKS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Marking 10 Saw profile 5 File profile 10 Drill holes 10 Finish 5 TOTAL 40 SIGNATURE OF TEACHER SIGNATURE OF SUBJECT HEAD Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 15 DBE/PAT 2019 NSC MECHANICAL TECHNOLOGY FITTING AND MACHINING MARK SHEET – SPACERS, BUSHES and AXLE GRADE 12 DATE PROJECT CANNON LEARNERS FACETS MARKS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 AXLE (FIGURE A1.4) Ø8 5 Ø10 5 Length 46 mm 5 Holes and M6 5 Total 20 FRAME SPACER BARREL (FIGURE A1.5) Ø6 5 Ø8 5 Total 10 FRAME SPACER – BOTTOM (FIGURE A1.6) Ø8 5 Length 46 mm 5 Total 10 FRAME SPACER – TOP (FIGURE A1.7) Length 46 mm 5 Holes and M6 5 Total 10 FRAME SPACER BUSHES (FIGURE A1.8) Ø12 5 Length 10,5 mm 5 Total 10 TOTAL 60 SIGNATURE OF TEACHER SIGNATURE OF SUBJECT HEAD Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 16 DBE/PAT 2019 NSC MECHANICAL TECHNOLOGY FITTING AND MACHINING MARK SHEET – ASSEMBLE and TOTALS GRADE 12 DATE PROJECT CANNON LEARNERS FACETS MARKS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Safety 5 Assembly 5 Presentation 5 TOTAL 15 TOTALS BARREL 75 FRAME 40 SHAFTS 60 WHEELS 60 ASSEMBLY 15 TOTAL 250 Total PAT Mark 100 SIGNATURE OF TEACHER SIGNATURE OF SUBJECT HEAD NOTE: On all the diameters learners will lose 1 mark for every 0,1 mm variation from the basic size and on all the lengths the learners will lose 1 mark for every 0,25 mm variation from the basic size. Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 17 DBE/PAT 2019 NSC SECTION B: AUTOMOTIVE (SPECIFIC) Term: 1 to 3 Starting date: January 2019 Completion date: August 2019 INTRODUCTION: • This section comprises of SEVEN practical tasks (choose any FOUR of the seven given tasks, namely compression test (B1), cylinder leakage test(B2), gas analysing test (B3) and wheel balancing (B4), charging system (B5), radiator test (B6), measuring engine components with measuring instruments (B7). • It also consists of ONE compulsory task, namely engines – valves (B8). The teacher must explain to the learners which knowledge and skills will be assessed when these tasks are being performed as well as the time in which to complete each task. Activity outcome: • Learners apply theoretical knowledge in practice • Safety, tools, maintenance and systems and control • Correct use of tools and equipment • Use equipment to diagnose low compression or other faults in the engine cylinder NOTE: • Complete any FOUR of the seven tasks (B1, B2, B3, B4, B5, B6, B7). • These tasks must be done under supervision of the teacher and the learners should be assessed while they are performing these tasks. • The learners should answer questions, record findings and give reasons for certain actions on the worksheet provided while they are performing these tasks. TASK B1: COMPRESSION TEST – QUESTIONS • Answer the questions on WORKSHEETS B1.1 and B1.2 TASK B1: COMPRESSION TEST – PROCEDURE • Use the specification manuals to obtain readings for the engine that you are using to conduct the compression test. • Do a dry compression test on a four-cylinder, four-stroke petrol engine and record the findings on WORKSHEET B1.3. NOTE: The learner must record and give reasons for certain actions when he/she completes this task. TASK B2: CYLINDER LEAKAGE TEST – QUESTIONS • Answer the questions on WORKSHEETS B2.1 and B2.2. TASK B2: CYLINDER LEAKAGE TEST – PROCEDURE • Use the specification manuals to obtain readings for the engine that you are using before conducting the cylinder leakage test. • Do a cylinder leakage test on a four-cylinder, four-stroke petrol engine and record the findings on WORKSHEET B2.3. NOTE: The learner must record and give reasons for certain actions when he/she completes this task. Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 18 DBE/PAT 2019 NSC TASK B3: GAS ANALYSING TEST – QUESTIONS • Answer the questions on WORKSHEETS B3.1 and B3.2. TASK B3: GAS ANALYSING TEST – PROCEDURE • Use the specification manual to obtain readings for the engine that you are using before conducting the gas analysing test. • Do a gas analysing test on an internal combustion engine and record the findings on WORKSHEET B3.3. NOTE: The learner must record and give reasons for certain actions when he/she completes this task. TASK B4: WHEEL BALANCING – QUESTIONS • Answer the questions on WORKSHEETS B4.1 and B4.2. TASK B4: WHEEL BALANCING – PROCEDURE Perform the wheel balancing procedures on a wheel/tyre assembly and record the findings on WORKSHEET B4.3. NOTE: The learner must record and give reasons for certain actions when he/she completes this task. TASK B5: CHARGING SYSTEM – QUESTIONS • Answer the questions on WORKSHEET B5.1. TASK B5: CHARGING SYSTEM – PROCEDURE Perform the charging system procedures on an alternator, parts, stripping, testing and assembling and thereafter record the findings on WORKSHEET B5.2. NOTE: The learner must record and give reasons for certain actions when he/she completes this task. TASK B6: RADIATOR TEST – QUESTIONS • Answer the questions on WORKSHEET B6.1. TASK B6: RADIATOR TEST – PROCEDURE • Perform the radiator test procedures on a radiator cap, radiator and record the findings on WORKSHEET B6.2. TASK B7: MEASURING ENGINE COMPONENTS WITH MEASURING INSTRUMENTS – QUESTIONS • Answer the questions on WORKSHEET B7.1. TASK B7: MEASURING ENGINE COMPONENTS – PROCEDURE NOTE: CONDUCT ANY FOUR OF THE SEVEN TASKS GIVEN (B1, B2, B3, B4, B5, B6, B7). Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 19 DBE/PAT 2019 NSC TASK B1: COMPRESSION TEST – QUESTIONS WORKSHEET: B1.1 NAME: QUESTION ANSWER MARK TOTAL 1. What is meant by engine 2 compression? 2. Give THREE reasons for low 3 compression in an engine. 3. What will be the effect of low 2 compression on an engine? 4. When should the compression 1 in an engine be checked? 5. Name the TWO compression tests that can be executed onto 2 an internal combustion engine. TOTAL – Compression test – questions 10 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 20 DBE/PAT 2019 NSC TASK B1: COMPRESSION TEST – PROCEDURE WORKSHEET: B1.2 NAME: PROCEDURE REASON MARK TOTAL Get engine to running 2 temperature Remove spark plugs 2 What action should take place before spark plugs 2 are removed? Remove air filter 2 Remove HT lead from 2 coil Fully open accelerator 2 Crank the engine 2 Record readings 2 Compare readings 2 between cylinders Compare readings with manufacturer's 2 specifications Execute a wet compression test on 5 a cylinder with a low reading TOTAL – Compression test – procedure 25 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 21 DBE/PAT 2019 NSC TASK B1: COMPRESSION TEST – PROCEDURE WORKSHEET: B1.3 NAME: Results of the cylinder compression test executed: PROCEDURE RESULT MARK TOTAL Cylinder compression according to 2 manufacturer's specifications Cylinder 1 2 Cylinder 2 2 Cylinder 3 2 Cylinder 4 2 Conclusion before and after wet compression 3 test Procedure to follow 2 TOTAL – Compression test – procedure Worksheet B1.3 15 TOTAL – Compression test – procedure Worksheet B1.2 25 TOTAL – Compression test – questions Worksheet B1.1 10 GRAND TOTAL 50 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 22 DBE/PAT 2019 NSC TASK B2: CYLINDER LEAKAGE TEST – QUESTIONS: WORKSHEET: B2.1 NAME: QUESTION ANSWER MARK TOTAL 1. What is the difference between the cylinder 2 compression test and the cylinder leakage test? 2. When is it necessary to execute a cylinder leakage 2 test on an internal combustion engine? 3. State THREE causes of cylinder leakages on an 3 internal combustion engine. 4. Explain THREE procedures to determine the 3 location of leakages on an internal combustion engine. TOTAL – Leakage test – questions 10 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 23 DBE/PAT 2019 NSC TASK B2: CYLINDER LEAKAGE TEST – PROCEDURE: WORKSHEET: B2.2 NAME: 1. Explain how the cylinder leakage test is executed on a four-cylinder four-stroke petrol engine. TOTAL – Leakage test – procedure 20 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 24 DBE/PAT 2019 NSC TASK B2: CYLINDER LEAKAGE TEST – PROCEDURE WORKSHEET: B2.3 NAME: Results of the cylinder leakage test executed: PROCEDURE RESULT MARK TOTAL Cylinder pressure 2 Cylinder 1 – Result 2 Conclusion 2 Cylinder 2 – Result 2 Conclusion 2 Cylinder 3 – Result 2 Conclusion 2 Cylinder 4 – Result 2 Conclusion 2 Procedures to follow 2 TOTAL – Leakage test – procedure (Results) Worksheet B2.3 20 TOTAL – Leakage test – procedure Worksheet B2.2 20 TOTAL – Leakage test – questions Worksheet B2.1 10 GRAND TOTAL 50 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 25 DBE/PAT 2019 NSC TASK B3: GAS ANALYSING – QUESTIONS: WORKSHEET: B3.1 NAME: QUESTION ANSWER MARK TOTAL 1. State the purpose of a gas analyser used on 3 an internal combustion engine. 2. When is it necessary to analyse the exhaust 2 gasses of an internal combustion engine? 3. What influences the combustion under different 4 operating conditions? List FOUR such influences. 4. Give FOUR reasons for 4 high CO readings. 5. Give FOUR reasons for 4 high HC readings. 6. Give FOUR reasons for 4 high CO 2 readings. 7. State FOUR safety measures to be carried out 4 when using the gas analyser. TOTAL – Gas analysing – questions 25 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 26 DBE/PAT 2019 NSC TASK B3: GAS ANALYSING – PROCEDURE: WORKSHEET: B3.2 NAME: 1. Explain the procedure to conduct a gas analysis test on an internal combustion engine. TOTAL – Gas analysing – procedure 10 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 27 DBE/PAT 2019 NSC TASK B3: GAS ANALYSING – PROCEDURE: WORKSHEET: B3.3 NAME: Results of the gas analysing procedure on an internal combustion engine: PROCEDURE RESULT MARK TOTAL CO reading 2 Conclusion 2 HC reading 2 Conclusion 2 CO 2 reading 2 Conclusion 2 Final conclusion 3 TOTAL – Gas analysing – procedure (Results) Worksheet B3.3 15 TOTAL – Gas analysing – procedure Worksheet B3.2 10 TOTAL – Gas analysing – questions Worksheet B3.1 25 GRAND TOTAL 50 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 28 DBE/PAT 2019 NSC TASK B4: WHEEL BALANCING – QUESTIONS: WORKSHEET: B4.1 NAME: QUESTION ANSWER MARK TOTAL 1. Give THREE reasons for balancing the wheels of 3 a motor vehicle. 2. State THREE effects of unbalanced wheels on a 3 motor vehicle. 3. Why must a wheel balancer be in good 1 condition? 4. State THREE functions of the wheel-weight 3 hammer. 5. List THREE pre-checks to be carried out before 3 wheel balancing is done. 6. Define static balance of a wheel and tyre 2 assembly. 7. Define dynamic balance of a wheel and tyre 3 assembly. Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 29 DBE/PAT 2019 NSC A B C 8. FIGURE B4.1 shows different tyre conditions. 3 State the cause of EACH condition. FIGURE B4.1 A- B- C- 9. State FOUR safety measures to be carried out 4 when using the balancing equipment. TOTAL – Wheel balancing – questions 25 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 30 DBE/PAT 2019 NSC TASK B4: WHEEL BALANCING – PROCEDURE: WORKSHEET: B4.2 NAME: 1. Explain the procedure when balancing a wheel and tyre assembly. TOTAL – Wheel balancing – procedure 15 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 31 DBE/PAT 2019 NSC TASK B4: WHEEL BALANCING – PROCEDURE: WORKSHEET: B4.3 NAME: Balancing of a wheel and tyre assembly: PROCEDURE RESULT MARK TOTAL Condition of wheel tyre 2 assembly. Describe the lack of 3 balancing. Procedure to follow 3 Final result 2 TOTAL – Wheel balancing – procedure Worksheet B4.3 10 TOTAL – Wheel balancing – procedure Worksheet B4.2 15 TOTAL – Wheel balancing – questions Worksheet B4.1 25 GRAND TOTAL 50 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 32 DBE/PAT 2019 NSC TASK B5: CHARGING SYSTEM – QUESTIONS: WORKSHEET: B5.1 NAME: QUESTION ANSWER MARK TOTAL 1. State function of the 2 alternator. 2. State basic theory of the 3 alternator. 3. List THREE methods to increase the output 3 frequency of the alternator. 4. State the functions of the stator and stator 4 windings. C B 5. Label parts A–C of the rotor. 3 A A- B- C- Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 33 DBE/PAT 2019 NSC 6. State the functions of 3 the rotor assembly. 7. State the functions of the slip ring and brush 4 assembly. 8. State the function of the 2 diode. 9. State the function of the 2 heat sink. 10. State the functions of 2 the voltage regulator. 11. State the function 2 of the capacitor. TOTAL – The Charging System – questions 30 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 34 DBE/PAT 2019 NSC TASK B5: THE CHARGING SYSTEM – PROCEDURE: WORKSHEET: B5.2 NAME: F G E D C H 1. Label parts A–J of the I 5 alternator. J B A A- B- C- D- E- F- G- H- I- J- 2. State FOUR safety measures to be carried 4 out when working on an alternator. Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 35 DBE/PAT 2019 NSC 3. Explain the procedure to strip, test and assemble an alternator (11) TOTAL – Alternator – procedure 20 TOTAL – The Charging System – questions 30 GRAND TOTAL 50 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 36 DBE/PAT 2019 NSC TASK B6: RADIATOR TEST– QUESTIONS: WORKSHEET: B6.1 NAME: QUESTION ANSWER MARK TOTAL 1. State the function of the 2 radiator. 2. Which metal is used for the manufacturing of the radiator 2 core and tanks? 3. State SIX safety requirements while setting up 6 the radiator test. 4. List FOUR manufacturer's specifications required to 4 carry out a radiator test 5. State the function of the 2 thermostat. B C A 6. Label parts A–E of the 4 radiator cap. E D A- B- C- D- E- TOTAL – Radiator test – questions 20 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 37 DBE/PAT 2019 NSC 6.2 RADIATOR TEST – PROCEDURE: QUESTION ANSWER 1. Describe the procedure to conduct a radiator pressure 6 test. 2. Explain how you will test 5 the radiator cap. Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 38 DBE/PAT 2019 NSC 3. FAULT POSSIBLE CAUSES CORRECTIVE MEASURES 3.1 19 3.2 TOTAL – Radiator test faults – questions 20 TOTAL – Radiator test – procedure 30 GRAND TOTAL 50 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 39 DBE/PAT 2019 NSC TASK B7: MEASURING OF ENGINE COMPONENTS AND CALCULATING COMPRESSION RATIO – QUESTIONS: WORKSHEET: B7.1 NAME: QUESTION ANSWER MARK TOTAL 1. State the function of the 2 crankshaft. 2. State the function of the 2 vibration damper. 3. Define swept volume. 2 4. Define clearance volume. 2 5. Define compression ratio. 2 TOTAL – Definitions 10 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 40 DBE/PAT 2019 NSC 6. Measuring cylinder bore and crankshaft journal of an internal combustion engine. Answer the following questions: FIGURE B7.1: CRANKSHAFT AND MAIN-BEARINGS 6.1 Obtain specifications for the following: 6.1.1 Big-end journal 6.1.2 Main journal 6.1.3 Cylinder bore diameter 6.1.4 Strokes 6.1.5 Clearance (5) Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 41 DBE/PAT 2019 NSC 6.2 Measure big-end journal No.________________________ A1 A2 B1 B2 B1 B2 A1 A2 FIGURE B6.2: BIG-END JOURNAL 6.2.1 Ovality: A1 – B1 = A2 – B2 = 6.2.2 Taper: A1 – A2 = B1 – B2 = 6.2.3 Wear: (7) 6.3 Measure main journal No.________________________ A1 A2 B1 B2 B1 B2 A1 A2 FIGURE B6.3: MAIN JOURNAL 6.3.1 Ovality: A1 – B1 = A2 – B2 = 6.3.2 Taper: A1 – A2 = B1 – B2 = 6.3.3 Wear: (7) Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 42 DBE/PAT 2019 NSC 6.4 Measure cylinder bore No.________________________ B2 A2 A2 B2 B1 A1 A1 B1 FIGURE B6.4: CYLINDER BORE 6.4.1 Ovality: A2 – B2= A1 – B1 = 6.4.2 Taper: A1 – A2 = B1 – B2 = 6.4.3 Wear: (7) Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 43 DBE/PAT 2019 NSC 6.5 Calculate the compression ratio: 6.5.1 Measure the clearance between the piston and cylinder head (top ridge). Clearance = (3) 6.5.2 Measure the stroke length (when the piston is at bottom dead centre to the cylinder head). Stroke length = (3) 6.5.3 Measure the bore diameter (Use answer in 6.4.) (2) 6.5.4 Use the above measurements to calculate the compression ratio ( Clearance, stroke length and bore diameter) Compression ratio = (6) TOTAL – Measurement of engine components – procedure 40 TOTAL – Measurement of engine components – questions 10 GRAND TOTAL 50 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 44 DBE/PAT 2019 NSC THE FOLLOWING TASK IS COMPULSORY TASK B8: ENGINES VALVES – QUESTIONS (COMPULSORY) WORKSHEET: B8 NAME: 1. FIGURE B8.1 indicates the valve assembly of an internal combustion engine. Answer the following questions: B C A D FIGURE B8.1: VALVE ASSEMBLY 1.1 Label parts A–D indicated in FIGURE B8.1. A- B- C- D- (4) 1.2 Name the TWO types of valves in an internal combustion engine and state the function of each. (4) Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 45 DBE/PAT 2019 NSC 2. Setting of valve timing: 2.1 Describe the position of the crankshaft. (2) 2.2 Describe the position of the camshaft. (2) 2.3 State the TWO common methods used to link the camshaft to the crankshaft. (2) 3 FIGURE B8.2 indicates the cam/crank shaft layout of an internal combustion engine. Answer the following questions: B C A D FIGURE B8.2 3.1 Identify the type of drive shown in FIGURE B8.2. (2) 3.2 Label parts A–D indicated in FIGURE B8.2. A- B- C- D- (4) Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 46 DBE/PAT 2019 NSC 3.3 What is the function of part A of the system shown in FIGURE B8.2? (2) 3.4 State FOUR advantages of the drive in FIGURE B8.2. (4) 4 Answer the following questions regarding setting of the valve clearance: 4.1 Why should the engine be at normal operating temperature? (2) 4.2 Give TWO reasons why the clearance for each type of valve differs. (2) 4.3 Give TWO reasons why the surface area for each type of valve differs. (2) 4.4 State TWO harmful effects of a valve clearance that is too large. (2) 4.5 State TWO harmful effects of a valve clearance that is too small. (2) 4.6 Describe the correct sequence for setting valves on an internal combustion engine. (4) TOTAL – Engine Valves – questions 40 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 47 DBE/PAT 2019 NSC TASK B8: ENGINES VALVES – PROCEDURE (COMPULSORY) WORKSHEET: B8.2 NAME: Setting valves and timing Describe the engine used, in terms of the following terms: TERM DESCRIPTION MARK TOTAL Cam shaft position 2 Number of valves 2 Type of crank/cam drive 2 Firing order 2 Valve clearance 2 TOTAL – Engine Valves – procedure Worksheet B8.2 10 TOTAL – Engine Valves – questions Worksheet B8.1 40 TOTAL B8 50 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 48 DBE/PAT 2019 NSC MECHANICAL TECHNOLOGY AUTOMOTIVE MARK SHEET GRADE 12 DATE LEARNERS TASKS MARKS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 COMPRESSION 50 TEST B1 CYLINDER LEAKAGE TEST 50 B2 GAS ANALYSING 50 B3 WHEEL 50 BALANCING B4 ALERNATOR B5 50 RADIATOR TEST 50 B6 ENGINE MEASUREMENT 50 B7 ENGINES – 50 VALVES B8 GRAND TOTAL 250 Final PAT Mark 100 SIGNATURE OF TEACHER SIGNATURE OF SUBJECT HEAD Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 49 DBE/PAT 2019 NSC SECTION C: WELDING AND METALWORK (SPECIFIC) Term: 1 to 3 Starting date: January 2019 Completion date: August 2019 INTRODUCTION: This section comprises TWO tasks: C1: Document safe C2: Fire place (Choose any ONE of the two tasks.) The following standards must be achieved: • All sizes must be within ± 1 mm of the required measurements. • There must be no damage to tools and equipment. • All appropriate safety procedures must be adhered to. • The project must be well presented. TASK C1 – DOCUMENT SAFE 1. Drawing and dimensions: 1.1 Use the drawing indicated in FIGURE C1.1 to fabricate a document safe to specifications. DESCRIPTION FIGURE MATERIAL Top, back and bottom C1.1 2 mm mild steel sheet metal Sides C1.1 2 mm mild steel sheet metal Door and door frame C1.1 and C1.2 2 mm mild steel sheet metal Lock back plate C1.3 6 mm mild steel flat bar (Refer to lock size) Reinforce on door Own drawings Own design and door frame Copyright reserved Please turn over

Mechanical Technology Downloaded from hlayiso.com 50 DBE/PAT 2019 NSC FIGURE C1.1: DOCUMENT SAFE Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 51 DBE/PAT 2019 NSC FIGURE C1.2: FRONT OF DOOR FIGURE C1.3: BACK OF DOOR Criteria for reinforcing the door and door frame: The door and door frame of the document safe needs to be reinforced Design a method to reinforce the door and door frame of the document safe to improve the effectiveness of the safe. Examples of reinforcing methods: • U-shaped reinforcement • Triangulation • Bracing Complete worksheets C1.1 and C1.2. Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 52 DBE/PAT 2019 NSC TASK C1: WELDING – DOCUMENT SAFE WORKSHEET: C1.1 NAME: 1. Welding – manufacturing of document safe 1.1 State FIVE safety precautions to be adhered to while manufacturing the document safe. (5) 1.2 Name SIX tools that you will be using during the manufacturing of the document safe. (6) 1.3 List FIVE skills needed for the manufacturing of the document safe. (5) 1.4 Explain FOUR processes to consider during the manufacturing of the document safe. (4) TOTAL – Document safe – questions 20 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 53 DBE/PAT 2019 NSC WORKSHEET: C1.2 NAME: 1. Welding – Reinforcing door and door frame. 1.1 Give the reason for reinforcing the door and doorframe of the safe. (4) 1.2 Make use of neat freehand sketches to design THREE possible methods to reinforce the door and doorframe. METHOD – 1 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 54 DBE/PAT 2019 NSC METHOD – 2 Copyright reserved Please turn over

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Downloaded from hlayiso.com Mechanical Technology 56 DBE/PAT 2019 NSC 1.3 Choose the method that you are going to apply and give a motivation for your choice. (5) 1.4 Application (10) TOTAL [25] Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 57 DBE/PAT 2019 NSC MECHANICAL TECHNOLOGY WELDING AND METALWORK MARK SHEET 1 GRADE 12 DATE PROJECT DOCUMENT SAFE LEARNERS MARKS FACETS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 WORKSHEET Safety 5 Tools 6 Skills 5 Processes 4 TOTAL 20 TOP, BACK and BOTTOM Marking 10 Cutting 5 Bending 10 TOTAL 25 SHELF Marking 5 Cutting 5 Fitting 10 Welding 10 TOTAL 30 SIGNATURE OF TEACHER SIGNATURE OF SUBJECT HEAD Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 58 DBE/PAT 2019 NSC MECHANICAL TECHNOLOGY WELDING AND METALWORK MARK SHEET 2 GRADE 12 DATE PROJECT DOCUMENT SAFE LEARNERS FACETS MARKS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 SIDES Marking 5 Cutting 5 Welding 10 Finish 5 TOTAL 25 DOOR and DOOR FRAME Marking 10 Cutting 10 Fitting 10 Welding 10 Finish 5 TOTAL 45 SIGNATURE OF TEACHER SIGNATURE OF SUBJECT HEAD Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 59 DBE/PAT 2019 NSC MECHANICAL TECHNOLOGY WELDING AND METALWORK MARK SHEET 3 GRADE 12 DATE PROJECT DOCUMENT SAFE LEARNERS FACETS MARKS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 LOCK BACK PLATE Marking 10 Cutting 5 Drill and Tapping 10 Fitting 5 Welding 5 Fitting lock 10 Keyhole 5 TOTAL 50 REINFORCE ON DOOR AND DOOR FRAME Reason 4 Design 6 Motivation 5 Application 10 TOTAL 25 SIGNATURE OF TEACHER SIGNATURE OF SUBJECT HEAD Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 60 DBE/PAT 2019 NSC MECHANICAL TECHNOLOGY WELDING AND METALWORK MARK SHEET 4 GRADE 12 DATE PROJECT DOCUMENT SAFE LEARNERS FACETS MARKS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 PRESENTATION Product assembly 5 Finish 5 Ecstatic 10 appearance Branding 10 TOTAL 30 TOTALS Worksheet 20 Top, Back and 25 Bottom Shelve 30 Sides 25 Door and 45 Door frame Lock back plate 50 Reinforce on door 25 Presentation 30 GRAND TOTAL 250 Total PAT Mark 100 SIGNATURE OF TEACHER SIGNATURE OF SUBJECT HEAD Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 61 DBE/PAT 2019 NSC TASK C2: WELDING – MANUFACTURING OF FIRE PLACE (CHOICE) Use your practical skills and manufacture the fire place as indicated in FIGURES C2.1; C2.2; C2.3; C2.4; C2.5 and C2.6. The following standards must be achieved: • All the sizes must be within ± 1mm of the required measurements. • There must be no damage to tools and equipment. • All appropriate safety procedures must be adhered to. • The fire place must be safe and operational. • The project must be well presented. DESCRIPTION FIGURE MATERIAL Ash tray and fire grid C2.1 2 mm stainless steel/mild steel sheet metal C2.2 and Irregular hexagon hearth 2 mm stainless steel/mild steel sheet metal C2.3 Chimney C2.4 2 mm stainless steel/mild steel sheet metal Assembly C2.5 2 mm stainless steel/mild steel expanded metal FIGURE C2.1: ASH TRAY and FIRE GRID Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 62 DBE/PAT 2019 NSC FIGURE C2.2: HEXAGON HEARTH TEMPLATE 1 FIGURE C2.3: HEXAGON HEARTH TEMPLATE 2 FIGURE C2.4: CHIMNEY Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 63 DBE/PAT 2019 NSC FIGURE C2.5: ASSEMBLY Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 64 DBE/PAT 2019 NSC Criteria for the chimney cap: Design a chimney cap to fit onto the chimney top to protect the opening from objects falling into the chimney. The chimney cap design must be based on the cone development principles. The chimney triangle is 200 mm all sides (equilateral triangle). Description Material Chimney cap 0,8–1 mm stainless steel/mild steel 3 x Supports 2 mm stainless steel/mild steel EXAMPLES: FIGURE C2.6: CHIMNEY CAP NOTE: Complete worksheets C2.1 and C2.2. Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 65 DBE/PAT 2019 NSC TASK C2: WELDING – FIRE PLACE WORKSHEET: C2.1 NAME: 1. Welding – manufacturing of a fire place 1.1 State FIVE safety precautions to be adhered to when fabricating the fire place. (5) 1.2 Name SIX tools that you will use when fabricating the fire place. (6) 1.3 List FIVE skills one needs to use during the fabrication of the fire place. (5) 1.4 Explain FOUR processes to consider when manufacturing the fire place. (4) TOTAL – FIRE PLACE – QUESTIONS 20 Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 66 DBE/PAT 2019 NSC WORKSHEET: C2.2 NAME: 1. Welding – Chimney cap: 1.1 Make use of neat freehand sketches to design THREE possible options for the chimney cap. OPTION – 1 Copyright reserved Please turn over

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Downloaded from hlayiso.com Mechanical Technology 69 DBE/PAT 2019 NSC 1.2 Choose the option that you are going to apply and give a motivation for your choice. (4) Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 70 DBE/PAT 2019 NSC 1.3 Do all the necessary calculations and make a template from paper. (5) 1.4 Application (30) TOTAL [45] Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 71 DBE/PAT 2019 NSC MECHANICAL TECHNOLOGY WELDING AND METALWORK MARK SHEET 1 GRADE 12 DATE PROJECT FIRE PLACE LEARNERS FACETS MARKS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 WORKSHEET Safety 5 Tools 6 Skills 5 Processes 4 TOTAL 20 ASH TRAY and FIRE GRID Template 10 Marking 5 Cutting 10 Bending 10 Welding 5 Finish 5 Cutting grid 5 Fitting grid 10 TOTAL 60 SIGNATURE OF TEACHER SIGNATURE OF SUBJECT HEAD Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 72 DBE/PAT 2019 NSC MECHANICAL TECHNOLOGY WELDING AND METALWORK MARK SHEET 2 GRADE 12 DATE PROJECT FIRE PLACE LEARNERS FACETS MARKS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 HEXAGON HEARTH Template – 1 10 Marking 10 Cutting 10 Template – 2 5 Marking 5 Cutting 5 Fitting 10 Welding 10 Finish 5 TOTAL 70 SIGNATURE OF TEACHER SIGNATURE OF SUBJECT HEAD Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 73 DBE/PAT 2019 NSC MECHANICAL TECHNOLOGY WELDING AND METALWORK MARK SHEET 3 GRADE 12 DATE PROJECT FIRE PLACE LEARNERS FACETS MARKS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 CHIMNEY Marking 5 Cutting 5 Welding 10 Finish 5 TOTAL 25 CHIMNEY CAP Design 6 Motivation 4 Template 5 Marking 5 Cutting 5 3 x supports 5 Fitting 5 Welding 5 Finish 5 TOTAL 45 SIGNATURE OF TEACHER SIGNATURE OF SUBJECT HEAD Copyright reserved Please turn over

Downloaded from hlayiso.com Mechanical Technology 74 DBE/PAT 2019 NSC MECHANICAL TECHNOLOGY WELDING AND METALWORK MARK SHEET 4 GRADE 12 DATE PROJECT FIRE PLACE LEARNERS FACETS MARKS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 PRESENTATION Product assembly 5 Finish 5 Ecstatic 10 appearance Branding 10 TOTAL 30 TOTALS Worksheet 20 Ash tray and 60 fire grid Hexagon hearth 70 Chimney 25 Chimney cap 45 Presentation 30 GRAND TOTAL 250 Total PAT Mark 100 SIGNATURE OF TEACHER SIGNATURE OF SUBJECT HEAD Copyright reserved

Downloaded from hlayiso.com Mechanical Technology 75 DBE/PAT 2019 NSC 5. CONCLUSION On completion of the practical assessment task learners should be able to demonstrate their understanding of the industry, enhance their knowledge, skills, values and reasoning abilities as well as establish connections to life outside the classroom and address real-world challenges. The PAT furthermore develops learners' life skills and provides opportunities for learners to engage in their own learning. Copyright reserved