Engineering Graphics and Design Grade 12 P2 2012 QP (Eng)

Downloaded from hlayiso.com INSTRUCTIONS AND INFORMATION 1. This question paper consists of FOUR questions. 2. Answer ALL the questions. 3. ALL drawings are in third-angle orthographic projection, unless otherwise stated. 4. ALL drawings must be completed using instruments, unless otherwise stated. 5. ALL answers must be drawn accurately and neatly. 6. ALL the questions must be answered on the QUESTION PAPER as instructed. GRADE 12 7. ALL the pages must be re-stapled in numerical sequence, irrespective of whether the question was attempted. 8. Time management is essential in order to complete all the questions. 9. Print your examination number in the block provided on every page. 10. Any details or dimensions not given must be assumed in good proportion. NATIONAL SENIOR CERTIFICATE FOR OFFICIAL USE ONLY QUESTION MARKS OBTAINED ½ SIGN MODERATED ½ SIGN 1 GRADE 12 2 3 4 ENGINEERING GRAPHICS AND DESIGN P2 TOTAL NOVEMBER 2012 2 0 0 2 0 0 FINAL CONVERTED MARK CHECKED BY MARKS: 100 TIME: 3 hours _______ 100 COMPLETE THE FOLLOWING: CENTRE NUMBER This question paper consists of 6 pages. CENTRE NUMBER EXAMINATION NUMBER EXAMINATION NUMBER BASIC-EDUCATION Copyright reserved Please turn over

Engineering Graphics and Design/P2 DBE/November 2012 Downloaded from hlayiso.com j 24.) QUESTION 1: ANALYTICAL (MECHANICAL) Given: A detailed drawing showing THREE views of an ejector base, a title block and a table of questions. The drawing has not been prepared to the indicated scale. Instructions: Complete the table below by neatly answering the questions, which all refer to F the accompanying detailed drawing and the title block. [30] QUESTIONS ANSWERS SOLES o14 1 | Who approved the drawing? % CBORE @ 28x4DEEP | 9 | What SI unit are the dimensions presented in? % 3. | When was the drawing checked? 4 4 | Who was responsible for the revision? 4 5 | What drawing method was used to prepare the drawing? % | 6 | How many ejector bases must be manufactured? % 7 |How many surfaces require machining? 1 [as 8 | What is the roughness value of the machined surfaces? 1 9 | What method must be used to produce the machined surfaces? 1 \ Roe 10 | What is the angle to the horizontal of the surface at 1? 1 4 11 | What is the angle to the horizontal of the surface at 2? 1 3 12 | How many holes are there in the casting? 1 7 13 | What does the abbreviation C’BORE stand for? 1 14 | What would VIEW 2 be called? 1 15 | What is the radius of the fillet at 5? 1 es 46 | Determine the complete dimensions at: A B c D E 5 __ ee 7 17 | What is the total height of the ejector base? 3 | | | q 18 | What is the upper tolerance of the dimension at 3? 2 y 19 | What is the upper and lower tolerance of the dimension at 4? 4 120 20 |In the box below (ANSWER 20), draw, in neat freehand, the symbol for the projection system used. 4 164 VIEW 3 viEW2 TOTAL 30 ALL DIMENSIONS ARE IN MILLIMETRES. UNLESS OTHERWISE SPECIFIED, GRINDING | ALL TOLERANCES ON DIMENSIONS SCALE 2 ANSWER 0 12012-08-03} SGOBA REDUCE TOLERANCE VALUES 1 ALL UNSPECIFIED RADII ARE 6 mm. DRAWING PROGRAMME: AUTOCAD DATE REVISED BY REVISION DESCRIPTION No. MATERIAL: CAST IRON FILE NAME: TLS30.dwg ENGINEERING vee eae 7000 | CHECKED BY: L MBELE DATE: 2012-07-18 aR RAGA NONE TITLE APPROVED BY: J BURGER DATE: 2012-07-19 EJECTOR BASE QUANTITY. 382 EXAMINATION NUMBER [2 Copyright reserved Please tum over

Engineering Graphics and Design/P2 ry 4a 24 I i a IS ASSESSMENT CRITERIA 1 | CENTRE LINES+consTR’ | 6 HELICES + SHAFT « ? | DIRECTION 18 SUBTOTAL 24 Downloaded from hlayiso.com QUESTION 2: LOCI NOTE: Answer QUESTIONS 2.1 AND 2.2. 2.4 Thread Given: © The profile of a single-start right-hand square thread in the starting position * The complete core * The position of S on the drawing sheet Instructions: * Draw, to scale 1: 1, ONE AND A HALF turns of the single- start right-hand square thread * Show ALL necessary construction. * NO hidden detail is required. [24] Copyright reserved “SB pe DBE/November 2012 2.2 Mechanism Given: * A schematic diagram of a mechanism consisting of a crank B, which is attached to a connecting rod AC at point B © The position of centre point O on the drawing sheet Motion: As crank OB rotates in a clockwise direction, point A moves to and fro along axis D-D. Instructions: * Draw, to scale 1:1, the given schematic drawing of the mechanism. * Trace the locus generated by point C for ONE complete revolution of the mechanism. * Show ALL necessary construction. [18] ASSESSMENT CRITERIA 1 | GIVEN 4 2 | CONSTRUCTION 6 3 | LOCUS + CURVE 8 SUBTOTAL 18 TOTAL 42 EXAMINATION NUMBER EXAMINATION NUMBER [3 Please tum over

Engineering Graphics and Design/P2 Downloaded from hlayiso.com — >be Copyright reserved QUESTION 3: ISOMETRIC DRAWING Given: © The front view, top view and left view of a bracket with a regular octagonal hole * The position of point A on the drawing sheet Instructions: Using scale 1:1, convert the orthographic views of the bracket into an isometric drawing * Make A the lowest point of the drawing. * Show ALL necessary construction « NO stencils may be used. * NO hidden detail is required. [36] 51 46 ie I | | > E ge q L r 12 tr 20 100 ; R38 TLE “BA ata 25 > Le) 34 63 ASSESSMENT CRITERIA 7 PAUXVIEWS +ciRCLE + | CONSTR’ + PLACE 2 | OCTAGONAL HOLE 10 3 [iso'+Non-iso'tines | 21 TOTAL 36 EXAMINATION NUMBER EXAMINATION NUMBER [4 Please tum over

Engineering Graphics and Design/P2 Downloaded from hlayiso.com — y— BHOLES 25 <a o- 44 20,120.) 20 103 114 HOUSING (1) 4 2x2 SLOT GRUB SCREW (3) R11 I " | \ Re i SPACER (4) KEYWAY 4 WIDE RELEASE ARM (2) WASHER (8) | ~ \mta Pa SHAFT (6) M14 NUT (9) Copyright reserved QUESTION 4: MECHANICAL ASSEMBLY Given: ©The exploded isometric drawing of the parts of a clutch release housing assembly, showing the position of each part relative to all the others * Orthographic views of each of the parts of the clutch release housing assembly Instructions: * Answer this question on page 6. * Draw, to scale 1:1 and in third-angle orthographic projection, the following views of the assembled parts of the clutch release housing assembly: 4.1 A sectional front view on cutting plane A-A, as seen from the direction of the arrow shown on the exploded isometric drawing. The cutting plane, which passes vertically through the centre of the assembly, is shown on the right view of the housing (part 1). 4.2 The right view * ALL drawing must comply with the guidelines contained in the SABS 0111. NOTE: * Show THREE faces of the nut in the front view and ALL necessary construction. * NO hidden detail is required Add the following feature to the drawing: 46 * The cutting plane A-A [92] PARTS LIST PART QUANTITY MATERIAL 1, HOUSING 1 ‘CAST IRON 2. RELEASE ARM 1 CAST IRON p30 3. GRUB SCREW 1 MILD STEEL 4, SPACER 1 MILD STEEL Al 5. KEY 1 MILD STEEL | 6. SHAFT 1 MILD STEEL 7. LEVER 1 MILD STEEL 8. WASHER 1 MILD STEEL 9. M14 NUT 1 MILD STEEL 3| 29 BURMAN ROAD, WAS TE R fA T DEALPARTY 1 FAO Lt TIN CAS PORT ELIZABETH 6025 waw.mtech.co.za 4 ENGINEERING ‘® 041 545 7820 |_|7 a0/ T \ar CLUTCH RELEASE HOUSING |18 | LEVER (7) ALL DIMENSIONS ARE | ALL UNSPECIFIED IN MILLIMETRES, RADII ARE R2. i Please tum over

° a Downloaded from hlayiso.com a ASSESSMENT CRITERIA SECTIONAL FRONT VIEW 4 | House 9 2 [acieasemn | oh 3 | GRUB scREW 3 Ace 3 5 | key 2 oyeam oh 7 ies 7 8 | WASHER 2 9 | m4 NUT 5 nj eeene 13 SUBTOTAL 60 RIGHT VIEW 41 | HousING 5 Alas | 2 3 | tever 4 4 | atenat 4 SUBTOTAL 17 GENERAL 4 | CENTRE LINES 4 2 |puane 3 3 | assewaty 8 SUBTOTAL 15 TOTAL 92 EXAMINATION NUMBER EXAMINATION NUMBER [6 Copyright reserved