Engineering Graphics and Design Grade 12 P2 2013 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 FEBRUARY/MARCH 2013 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 Downloaded frem hlayiso.com DBE/Feb.-Mar. 2013 90 QUESTION 1: ANALYTICAL (MECHANICAL) Given: A detailed drawing showing FOUR views of a connector, a title block and a table of questions. The drawings have not been prepared to the indicated scale, Instructions: Complete the table below by neatly answering the questions, which all refer to Copyright reserved the accompanying detailed drawing and the title block. [30] 1 ]Onwhat date was the drawing approved? % s— 2. | What is the file name of the drawing? % 2HOLES 25 40,25 3__| What was the nature of the first revision? 2 A 4_ | What material is the connector made of? 2 5 | Whatis the radius of the unspecified curves? % 6 | How many surfaces require machining? % sy 7 | What method must be used to produce the machined surfaces? 1 8 | What does N4 on the machining symbol represent? 1 9 |Name the curve at 1 1 s 10 | What is the diameter of the circle at 2? 1 11 | Name the slot at 3. 1 12 | Name the curve at 4. 1 13 | What is the tolerance on the unspecified dimensions? 1 14 | What is the distance between the centres of the two holes at 5? 1 15 | How many threaded holes are there on the connector? 1 16 | What is the total height of the connector? 1 17 | What would VIEW 4 be called? 1 18 | What type of sectional view would result from cutting plane SS? 1 100 s 19 | Determine the complete dimensions: A. B E 5 20 | What is the upper tolerance of the dimension at 6? 2 VIEW 2 VIEW 3 21 | What is the upper and lower tolerance of the dimension at 7? 4 ALLE MENSIONS ARE N 22 |In the box below (ANSWER 22), draw, in neat freehand, the symbol for the projection system used. 4 MILLIMETRES. MILLING ALL UNSPECIFIED RADII ARE 2,5 mm. | N4/ TOTAL 30 [2012-08-06] MARYNA ADD MACHINING SYMBOLS 2 | UNLESS OTHERWISE SPECIFIED, TOLERANCES ON DIMENSIONS [2012-08-04] MARYNA INCREASE TOLERANCE 1 | are +03. QUANTITY: 76 ANSWER 22 DATE REVISED BY REVISION DESCRIPTION Ne | DRAWN BY: NOLWAzI DATE: 2012-07-15 PRECISION isbvER STREET | CHECKED BY: AKHEEL DATE: 2012-07-18 EAST LONDON |” APPROVED BY: DANIEL DATE: 2012-07-19 www,precision.co.za - - ENGINEERING WORKS %# 043 645 7620 | ATERIAL: CAST IRON FILE NAME: UFF 335.dwg EXAMINATION NUMBER TITLE CON N ECTOR HEAT TREATMENT: NONE. DRAWING No. 12-0967-mse SCALE: 1:2 EXAMINATION NUMBER [2 Please tum over

Engineering Graphics and Design/P2 Downloaded from hlayiso.com — r 30° 60" 90° 120° 150° 180° 210° 240° 270° 300° 330° 360° DISPLACEMENT GRAPH SCALE 8 mm = 30° graph © Show the centre lines and the direction of rotation on the cam profile. a * Show ALL necessary construction. [19] ASSESSMENT CRITERIA as 1 [FOLLOWER +MIN.DIST | 5 CILINES + CAMSHAFT \o12 2 | CONSTRUCTION 3 FOLLOWER DETAIL QUESTION 2: LOCI NOTE: Answer QUESTIONS 2.1 AND 2.2 2.1 CAM Given: * The displacement graph showing uniform motion and simple harmonic motion © The detail of a roller-ended follower Specifications: © The minimum distance from the cam profile to the centre of the camshaft = 19 mm Camshaft = 16 mm * Rotation = clockwise Instructions: © Draw, to scale 1: 1 and in the correct position, the given follower so that it will reciprocate along the vertical centre line of the camshaft. © Project and draw the cam profile from the given displacement 3 | PLOTTING + DIRECTION | 7 4 | CURVE 4 SUBTOTAL 19 Copyright reserved STARTING POSITION 2.2 HELICAL SQUARE SPRING Given: © The right view of a left-hand square spring, showing the starting position © The position of centre point O on the answer sheet Specifications: * Pitch = 48 mm © Spring profile = 12 x 12mm Instructions: © Draw, to scale 1 : 1, the front view and right view of the left-hand square spring * Show ONE AND A HALF turns ONLY. © Show ALL necessary construction * NO hidden detail is required [21] ASSESSMENT CRITERIA + | construction 5 2 | POINTS + CURVE 16 SUBTOTAL 21 TOTAL 40 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 right view of a bracket with a regular pentagonal 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. 137] 70 50. 85. 20, © ss ASSESSMENT CRITERIA 1 | AUX VIEW + CIRCLE 12 PENTAGON + PLACING 2 | LOWER PORTION 15% 3 | UPPER PORTION my TOTAL 37 EXAMINATION NUMBER EXAMINATION NUMBER [4 Please tum over

Downloaded from hlayiso.com — Engineering Graphics and Design/P2 12 as = 1 : Rig QUESTION 4: MECHANICAL ASSEMBLY i j a £6 |}__}_-__ Given: f * The exploded isometric drawing of the parts of a stop valve H q assembly, showing the position of each part relative to all the (Mig others 112 * Orthographic views of each of the parts of the stop valve ni 46 | assembly a Instructions: * Answer this question on page 6. * Draw, to scale 1 : 1 and in third-angle orthographic projection, = HANDLE (4) the following views of the assembled parts of the stop valve « assembly: ey je AE a2 4.1 A sectional front view on cutting plane A-A, as seen from the direction of the arrow shown on the exploded o16 A 920 i" ; i isometric drawing. The cutting plane, which passes oe” vertically through the centre of the assembly, is shown ees on the left view of the valve body (part 1), ay oF 4.2 The left view « WASHER (5) SEAL (2) * 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 SHAFT (3) necessary construction. SLOT 4 WIDE x8 DEEP » * NO hidden detail is required [93] @60 O28 XS PARTS LIST PART. QUANTITY MATERIAL RIGHT CUP SEAL (9) END CAP (10) | VALVE BODY 7 CAST RON 2. SEAL 1 FIBRE 3, SHAFT 1 MILD STEEL a 4. HANOLE 1 STEEL bated 7 6. M16 NUT 1 MILD STEEL — eS 7. LEFT CUP SEAL 1 TEFLON | 220, | 1 _ 1 _ H alzi 9. RIGHT CUP SEAL 1 TEFLON | s|>| 410. END CAP 1 MILD STEEL f I | PRECISION wssr vwwnn.precision.co,za ENGINEERING WORKS. ® 043 645 7820 STOP VALVE EXPLODED ISOMETRIC DRAWING varve pooy() INMILLIMSTRES. | RADIARER2. © E4 a eae i HH HM ae

Downloaded from hlayiso.com — Engineering Graphics and Design/P2 ASSESSMENT CRITERIA SECTIONAL FRONT VIEW 4 | va.ve eooy 10 2 | sea. 2 3 | shart 6 4 | HaNoLE 5 5 | waster 2 6 | m6 wur 5 7 | vert cup sea 5 8 | vave 3 9. | ricHt cup seat 4 410 | eno car 7 H | Hatcune 13 SUBTOTAL 62 LEFT VIEW 4 | Hance a 2 | wrewur 4 3 | shart 3 4 | washer h 5 | vawve soov 9 SUBTOTAL 20 GENERAL 4 | ceNTRE LINes 2 2 | assewary 9 SUBTOTAL 1 TOTAL 93 EXAMINATION NUMBER, EXAMINATION NUMBER [6 Sonia PO CT