Engineering Graphics and Design Grade 12 P2 NSC June 2022 QP

basic education Department: « )) Basic Education REPUBLIC OF SOUTH AFRICA SENIOR CERTIFICATE EXAMINATION/ NATIONAL SENIOR CERTIFICATE EXAMINATION Copyright reserved INSTRUCTIONS AND INFORMATION FENS PND 9. This question paper consists of FOUR questions. Answer ALL the questions. ALL drawings are in third-angle orthographic projection, unless otherwise stated. ALL drawings must be prepared using pencil and instruments, unless otherwise stated. ALL answers must be drawn accurately and neatly. ALL the questions must be answered on the QUESTION PAPER, as instructed. Do not fold any of the pages of the question paper in half. ALL the pages, irrespective of whether the question was attempted or not, must be re-stapled in numerical sequence in the TOP LEFT-HAND CORNER ONLY. Time management is essential in order to complete all the questions. 10. Print your examination number in the block provided on every page. 11. Any details or dimensions not given must be assumed in good proportion. FOR OFFICIAL USE ONLY QUESTION | MARKS OBTAINED | 3 | SIGN MODERATED 2] SIGN RE-MARKING +| SIGN 1 ENGINEERING GRAPHICS AND DESIGN P2 2 3 2022 4 TOTAL MARKS: 100 2/0/0 2/;0/0 2/;0/0 TIME: 3 hours FINAL CONVERTED MARK CHECKED BY 100 This question paper consists of 6 pages. 7 CO | COMPLETE THE FOLLOWING: | | CENTRE NUMBER | | | Barcode laba | CENTRE NUMBER | | EXAMINATION NUMBER | | L-----~-~-~~-~~~~~~~- 4 EXAMINATION NUMBER DO NOT FOLD THE QUESTION PAPER IN HALF. Please tum over

Engineering Graphics and Design/P2 SC/NSC DBE/2022 212 14. QUESTION 1: ANALYTICAL (MECHANICAL) Given: Two sectional views of a cylinder head sub-assembly, a detailed view of a valve, a title block and a table of questions. 0220 DRAWN: vusl DATE: 02/04/2021 ALL UNSPECIFIED RADII ARE R2. CHECKED: TARYN DATE: 03/05/2021 | TITLE CYLINDER HEAD APPROVED: GERALD DATE: 02/07/2021 SUB-ASSEMBLY = The drawing is not presented to the indicated scale. +A Instructions: oJ Complete the tate below by neatly answering the questions which refer to the accompanying drawing, the title block and 2 mechanical content. [30] oI ol a) L- - &} 0 ve \_ QUESTIONS ANSWERS | — \220 ocup 1 | What is the name of the manufacturing company? 1 MACHINING 2 | Who approved the drawing? 1 | 15 OF VALVE , - 4xMS BOLTS E 3 [How many sets of drawings are there for this sub-assembly? 1 4 | On what date was the drawing prepared? 1 « VIEW 1 — g - — 55 | Referring to the projection symbol, what is the projection system - used? ~ 6 | Which drawing program was used to prepare the drawing? 1 u 45° 7 | What size balts are required for the sub-assembly? 1 =| 2 _ 8 | How many coil springs are there in this sub-assembly? 1 n r Ra . i; 9 | Determine the complete dimensions at: A: B: Cc: D: E: 5 by 40 | What is the radius of the spherical cap? 1 r{n a 11 | What does the convention at F indicate? i * 1 Ags > ~ WT 12 | What does the convention at G indicate? 1 —T 5.5 13 | What machining method must be used on the machined surfaces? 1 me 44 | With reference to the tdlerence, determine the minimum q 1 dimension at J. G18 28 4g | With reference to the CAM at H, determine the displacement of the q a4 SPHRIS follower. ! | 46 | VIEW 1 is the SECTIONAL FRONT VIEW, what is VIEW 2 q — called? + ( | 17 | How many surfaces on this sub-assembly require machining? 1 L 18 |Insert the cutting plane for VIEW 1 on VIEW 2 andllabel it A-A. 34 yi 220 49 ||" the space below (ANSWER 19), draw, in neat freehand, the complete SANS 10711 conventional , | representation of a COIL SPRING. NA DETAIL OF 99 | Othe drawing below (ANSWER 20), raw, in neat freehand, the complete SANS 10117 conventional | 5 5 SPECIAL M8 NUT representation for . TOTAL | 30 ) ANSWER 19 ANSWER 20 VIEW 2 MC ENGINEERING WORKS GRINDING ——> FILE NAME: Javwi01 | DRAWING No. cami2 | PRAWNGSET: | css coz, CELL: 090 714 4922 44 DIESEL STREET DRAWING PROGRAM: AUTOCAD 2021 SCALE 1:1 KIMBERLEY CONVENTIONAL REPRESENTATION OF COMPLETE CONVENTIONAL REPRESENTATION OF A COIL SPRING DIAMOND KNURLING EXAMINATION NUMBER EXAMINATION NUMBER [2 Copyright reserved Please tum over

Engineering Graphics and Design/P2 SC/NSC DBE/2022 QUESTION 2: LOCH NOTE: Answer QUESTIONS 2.1 and 2.2. 2.1 MECHANISM Given: * Asschematic drawing of a mechanism consisting of crank OA, connecting rod BC and swivel guide E * The position of centre point O on the drawing sheet Specifications: * The positions of centre point O and swivel guide E are fixed. * Connecting rod BC is pin jointed to crank OAat A. Motion: Crank OA oscillates through 180° on centre point © as connecting rod BC slides freely through swivel guide E. Instructions: * Draw, to scale 1 : 1, the given schematic drawing of the mechanism. * Trace the loci generated by point B and by point C for ONE oscillation of crank OA. Show ALL construction. [20] ASSESSMENT CRITERIA 2.1 GIVEN 4 CONSTRUCTION 2 POINTS + CURVE 14 SUBTOTAL 20 2.2 CAM Motion: A cam, starting at its maximum displacement and rotating at constant velocity, imparts the following motion to a follower: * Itdescends 10 mm with uniform motion over the first 60°. * Itdescends a further 80 mm to the minimum displacement with simple harmonic motion over the next 90°. © There is a dwelll period for 30°. © Itrises 60 mm with uniform acceleration and retardation over the next 90°. There is a dwell period for 30°. © Itreturns to its original position with uniform motion over the rest of the rotation. Instructions: * Draw, to a displacement scale of 1: 1 and a rotational scale of 144 mm = 360°, the complete displacement graph for the required motion. © Labdl the displacement graph and indicate the rotational scale. Show ALL construction. [18] ASSESSMENT CRITERIA 2.2 1 CONSTRUCTION 6 2 POINTS + CURVE 1 3 LABELS 1 PENALTIES ¢) 2.2 SUBTOTAL 18 2.1 SUBTOTAL 20 TOTAL| 38 EXAMINATION NUMBER EXAMINATION NUMBER [3 Copyright reserved Please tum over

Engineering Graphics and Design/P2 SCINSC DBE/2022 > QUESTION 3: ISOMETRIC DRAWING ° Given: * The front view, top view and left view of a gauge 100 * The position of point P on the drawing sheet Instructions: Using scale 1: 1, convert the orthographic views of the gauge into an isometric drawing. * Use P as the starting point for the drawing. * Show ALL construction. * NO hidden detail is required. 139] 139 57 25 57 ol --- 28 ° HALF OF A 7 © HEXAGON a © 30° S| 3 Hy i aqofiifi H “ i i I & [20 Ls Aw 28 ASSESSMENT CRITERIA 1 | PLACING + AUX EWS 4 2 | LEFT PART 17 3 | MDDLE PART 73 4 | RIGHT PART 5 ‘CIRCLE + CENTRE LINES 5 | + constr’ 53 PENALTIES ¢) TOTAL | 39 EXAMINATION NUMBER EXAMINATION NUMBER: [4 Copyright reserved Please tum over

Engineering Graphics and Design/P2 SC/NSC DBE/2022 224 QUESTION 4: MECHANICAL ASSEMBLY Let 6x3 | Given: Fase © The exploded isometric drawing of the parts of a tailstock 45° CHAMFER 10x38 Space 4B assembly, showing the position of each part relative to all OEEP | the others a © Orthographic views of each of the parts of the tailstock © g| 3 3SLOTS assembly g g EQUALLY SPACED ON PCD 50 _ 916 ‘Instructions: * Answer this question on page 6. 2 8s * Draw, to scale 1: 1 and in third-angle orthographic = _ = RS projection, the following views of the assembled parts of g 22 | 60" the tailstock assembly: 12 30 . 4.1. A sectional front view on cutting plane A-A, as seen from the direction of the arrow on the exploded _t isometric drawing. The cutting plane is shown on the oo ADJUSTING HAND WHEEL [4] right view of the tailstock (part 1). tit al | ol 4.2. The right view 1 1 sy O86 LU —_ —| NOTE: © Planning is essential. a 30 © The drawing must comply with the SANS 10111 100 a guidelines. KEY [5] © Align point P on the adjusting stud (part 3) with point P on the tailstock (part 1). TAILSTOCK [1] © Show THREE faces of the M16 nut (part 7) in the front view and TWO faces of the M10 locking nut (part 9) in the right view. © NO hidden detail is required. 412 © Add cutting plane A-A. 193] 8 7 7 “Ty 7 M16 NUT [7] O 216 © PARTS LIST a4 9 ~ M10 x4 PARTS. QUANTITY MATERIAL DEAD CENTRE [2] M10 LOCKING NUT [9] 4 ‘| TAILSTOCK 1 CASTIRON 2 |DEAD CENTRE 1 ALLOY STEEL 3 | ADJUSTING STUD 4 MILD STEEL g 40 39 + wo Sy 4, | ADJUSTING HAND WHEEL 1 CAST STEEL 5 0 IL fm 1 @20 5 |key 1 MILD STEEL { 6 |WasHER 1 MILD STEEL M16 x2/ 7 M16 NuT 1 MILD STEEL 8 |woLockine stud 1 MILD STEEL Q |M10 LOCKING NUT 41 MILD STEEL ADJUSTING STUD [3] TURNIT 71 SALAH ROAD ——_———_ MANE ENGINEERING CC www.tumnitcoza EXPLODED ISOMETRIC DRAWING TAILSTOCK ASSEMBLY ALL DIMENSIONS ARE IN MILUIMETRES. ALL UNSPECIFIED RADII ARE 6 mm. © & [5] Copyright reserved Please tum over

Engineering Graphics and Design/P2 SCINSC DBE/2022 FOR OFFICIAL USE ONLY Ce INCORRECT ORTHOGRAPHIC PROJECTION INCORRECT OVERALL SCALE INCORRECT HATCHING PARTS NOT ASSEMBLED TOTAL PENALTIES ¢) ASSESSMENT CRITERIA RIGHT VIEW 1 | tastock 82 2 |otsbcente™ | 8 3 | locancaur "| 64 4 | aowstine stu 13 SUBTOTAL 244 SECTIONAL FRONT VIEW 41 ‘| Taustock 14 2. | veao centre 7 3 | acwustine WHEEL 9 4 | aowustinc sruo 163 5 |inotoccnosar” | 64 6 | xe 14 SUBTOTAL 544 GENERAL 1 | cenmre unes 4 2 | curtine Lane 3 3. | assewevy 7 SUBTOTAL 14 TOTAL| 93 PENALTIES (-) GRAND TOTAL EXAMINATION NUMBER EXAMINATION NUMBER [6 Copyright reserved