Engineering Graphics and Design Grade 12 P2 2024 QP (Eng)

basic education Department: Basic Education REPUBLIC OF SOUTH AFRICA NATIONAL SENIOR CERTIFICATE if ENGINEERING GRAPHICS AND DESIGN P2 “| I NOVEMBER 2024 J MARKS: 100 TIME: 3 hours This question paper consists of 6 pages. | | | | | | | Barcode label | | | | | | | DO NOT FOLD THE QUESTION PAPER IN HALF. Copyright reserved Confidential 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 prepared using pencil and 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. 7. 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. 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. FOR OFFICIAL USE ONLY QUESTION | MARKS OBTAINED | } | SIGN MODERATED 2 | SIGN RE-MARKING 2| SIGN 1 2 3 4 TOTAL 2|0|0 2|0/0 2|0/0 FINAL CONVERTED MARK CHECKED BY 100 COMPLETE THE FOLLOWING: CENTRE NUMBER CENTRE NUMBER EXAMINATION NUMBER EXAMINATION NUMBER Please tum over

Engineering Graphics and Design/P2 NSC Confidential DBE/November 2024 ANSWER 18 QUESTION 1: ANALYTICAL (MECHANICAL) Given: Two views of the assembled parts of a pin vice assembly, detailed views of the individual parts of the assembly drawn to a different scale, a parts list, a title block and a table of questions. The drawings are not presented to the indicated scales. Instructions: Complete the table below by neatly answering the questions, which refer to the accompanying drawings, title block \ n too mma) and mechanical content. [30] | J Ju QUESTIONS ANSWERS 1 | What unit of measurement has been used on the drawing? 1 2 | On what date was the drawing prepared? 1 3. | What is the title of the drawing? 1 4 | Whatis the telephone number of the draughting company? 1 5_| If VIEW 1 is the front view, what would VIEW 2 be called? 1 6 | What material is required for the handle? 1 7 | What scale is indicated for the individual parts? 1 ) 8 | How many 2 pins are there in a single pin vice assembly? 1 | | il 9 | How many pin vices must be manufactured? 4 x x] SECTION -Q D) [E 10 | Name the type of section shown at A. 4 VIEW 1 vIEW2 aes fl E i iS 3] | 41 | Name the type of section shown at B 1 ete GSI secrower @ ie What type of sect Id be produced by cutting plane P-P? : fat type of section would be produced by cutting plane P- A R x 12 yp pI y cutting p 1 SECTION S-S @ tJ 13 | How many surfaces of the pin vice assembly must be machined? 1 s| Is 44 | Name the part on which the depth of the threaded hole for the ; clamp screw (part 6) would be measured ~ JAWS [2] ADJUSTING CONE [3] P (part) 15 | Determine the complete dimensions at: C: 2 it PARTS LIST 2 Bes 16 | Determine the complete angle at E. 1 4 | No. PART QUANTITY MATERIAL cy With reference to the tolerance, determine the maximum and the | MAXIMUM: 1 7 4 | HANDLE 1 woop 7 jen : { i minimum size for the dimension at F. MINIMUM: 1 Sett) FR sil 2 [uaws 2 [siLveR STEEL 7 iat =] |! 4g | In the space provided above the views of the adjusting cone (ANSWER 18), use drawing A 2/2 | lz] 3 | ADJUSTING CONE 1 BRASS instruments to determine the centre point of the arc. Show ALL construction. | {TMS fo 4 | CLAMP ARM 2 STEEL 4g | Inthe space below (ANSWER 19), draw, in neat freehand, a machining symbol, with labels forthe |, CLAMP ARM [4] CLAMP BRACKET [5] CLAMP SCREW [6] = | cawP Racker 7 SEL information and processes provided in the table, for the given surface. 1 14 § Louw screw 7 STEEL 90 | I the space below (ANSWER 20), draw, in neat freehand, the SANS 10111 conventional ; FA 6 + I | 4 representation for a bearing = = PIN @25) 7 (2,5) 2 STEEL TOTAL | 30 PIN 82,5 [7] PIN 22 [8] PIN 22 [9] 8 | PIN @2) 1 STEEL ANSWER To ANSWER 20 9 | PIN (@2) 4 STEEL FILE NAME: CJ-10810 QUANTITY: 80 PIN VICES ALL UNSPECIFIED RADII 40,25 TOLERANCE: DRAWING No, 025 SCALE [ 4:5 ARE 3 mm. 0,3 INFORMATION AND PROCESSES CLIENT NAME: PRODUCTION METHOD GRINDING CaRoLusewetters, | DRAWING, qyrocap agg | ALL DIMENSIONS ARE IN <4 VILJOEN STREET, CULLINAN u ROUGHNESS VALUE 05 XANDER DRAUGHTING CC. www ksmerwedraw.coza _| DRAWN BY: CHRIS P DATE: 21-05-2024 DIRECTION OF LAY PERPENDICULAR 7 CHADLIN LANE, CULLINAN ‘e sre 00 © 028 685 1857 CHECKED BY: DIVAN DATE: 25-05-2024 | | acHiNING ALLOWANCE 02 EXAMINATION NUMBER me PIN VICE APPROVED BY: JOHN | DATE: 27-05-2024 SURFACE Oe EXAMINATION NUMBER [2 Copyright reserved Please tum over

Engineering Graphics and Design/P2 NSC Confidential DBE/November 2024 XS, Re QUESTION 2: LOCI NOTE: Answer QUESTIONS 2.1 and 2.2 .. 2.1: MECHANISM Given: * A schematic drawing of a mechanism consisting of crank OA, connecting rod AB and rocker CD © The position of centre point O on the drawing sheet Specifications: © The positions of centre point O and point C of rocker CD are fixed. * Connecting rod AB is pin-jointed to crank OA at A. * Rocker CD is pin-jointed to AB at D. Motion: As crank OA rotates for one complete rotation, rocker CD oscillates around point C. Instructions: © Using centre point O, draw, to scale 1 : 1, the given schematic drawing of the mechanism and label ALL the given points. © Trace the locus generated by point B for ONE complete rotation of crank OA. © Show ALL construction [193] 2.2: CAM Given: The bottom left-hand comer of the displacement graph, marked P, on the drawing sheet. Motion: Acam starts at the maximum displacement of 64 mm and imparts the following motion © There is a dwell period for the first 30°. * Itdescends to its minimum displacement over the next 90° with uniform acceleration and retardation. It rises 36 mm over the next 45° with uniform motion * There is a dwell period for the next 30°. # It then descends 22 mm over the next 30° with uniform motion. * There is a dwell period for the next 45°. * It returns to its original position over the last 90° with simple harmonic motion Instructions: © Using corner P as the 0° position, draw, to a rotational scale of 120 mm = 360° and a displacement scale of 1: 1, the displacement graph for the given motion * Label the displacement graph and include the rotational scale. * Show ALL construction. (183) pL fa ASSESSMENT CRITERIA 2.2 1 |GRAPH CONSTRUCTION | 6 ASSESSMENT CRITERIA 2.1 2 |Pownts + cuRVE re 4 |GIVEN 63 3 LABELS 4 2 |CONSTRUCTION 5 PENALTIES (-) 3 |Locus oF B 8 SUBTOTAL 2.2 184 PENALTIES () SUBTOTAL 2.1 193 EXAMINATION NUMBER TOTAL] 193 TOTAL] 38 EXAMINATION NUMBER [3 Copyright reserved Please tum over

Engineering Graphics and Design/P2 NSC Confidential DBE/November 2024 oe é QUESTION 3: ISOMETRIC DRAWING Given: © The front view, top view and right view of a casting © The position of point P on the drawing sheet Instructions: Using scale 1 : 1, convert the orthographic views of the casting into an isometric drawing © Use P as the starting and lowest point of the drawing. * Show ALL construction * NO hidden detail is required. [40] INCOMPLETE REGULAR PENTAGON 10 20 60 |__,10,__30 30 (415 |_ 25 i R40. 60° 130 | | | Thee el Lo P PP oo | ASSESSMENT CRITERIA 1 |PLACING + AUX. VIEW 23 2 |BASE + PENTAGON 20 3. |UPPER PORTION 143 4 |CIRCLES+CONSTR. +CL} 3 PENALTIES (-) TOTAL} 40 EXAMINATION NUMBER EXAMINATION NUMBER: [4 Copyright reserved Please tum over

Engineering Graphics and Design/P2 NSC Confidential DBE/November 2024 32 12 12, 20.12 aa M12 LEFT-END PLATE [1] 138 12 # 102 29 CYLINDER HOUSING [2] S______-54 98 23 CONNECTING ROD [4] ROD GUIDE [5] EXPLODED ISOMETRIC DRAWING 20 M28 x2 220 {12,0 COUPLING [6] 35 SL | B44 @48 on al- [5| PISTON [7] PISTON SEAL [8] 118 10 be 18 7 QUESTION 4: MECHANICAL ASSEMBLY Given: The exploded isometric drawing of the parts of a hydraulic cylinder assembly, showing the position of each part relative to all the others © Orthographic views of each of the parts of the hydraulic cylinder 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 hydraulic cylinder assembly: 4.1 The right view 4.2 A half-sectional front view on cutting plane A-A. Show the top half of the assembly in section, as seen from the direction of the arrow on the exploded Isometric drawing The cutting plane is shown on the right view of the right end plate (part 3). NOTE: * Planning is essential. * ALL drawings must comply with the SANS 10117 guidelines. © The convention of symmetry may NOT be applied. * Align point S on the connecting rod (part 4) with point S on the cylinder housing (part 2). * Show THREE faces of the M16 nut (part 10) on the half-sectional front view. * NO hidden detail is required. [92] PARTS LIST PART QUANTITY MATERIAL 4 | LEFT-END PLATE 1 STAINLESS STEEL 2. | CYLINDER HOUSING 1 MILD STEEL 3. | RIGHT-END PLATE 1 CAST IRON 4 | CONNECTING ROD 1 STAINLESS STEEL i | M16 NUT [10] 5 | ROD GUIDE 4 BRASS 7 | PISTON 4 ALUMINIUM ALLOY 8 | PISTON SEAL 1 RUBBER 9 | BOLT 2 MILD STEEL ENGINEERING CC www.strong.co.za ‘® 092 400 2590 HYDRAULIC CYLINDER ©Og ALL DIMENSIONS ARE IN MILLIMETRES. Copyright reserved Please tum over

Engineering Graphics and Design/P2 NSC Confidential DBE/November 2024 FOR OFFICIAL USE ONLY INCORRECT ORTHOGRAPHIC PROJECTION INCORRECT OVERALL SCALE INCORRECT HATCHING PARTS NOT ASSEMBLED TOTAL PENALTIES (-) ASSESSMENT CRITERIA RIGHT VIEW 2 | BOLTS 4 3 | COUPLING 33 4 | M16 NUT 4 SUBTOTAL 164 HALF-SECTIONAL FRONT VIEW 4 | LeFT-END PLATE | 104 CONNECTING 4 | ROD+PISTON+ 11 SEAL 5 | ROD GUIDE 3 6 | COUPLING 6 7 | BOLTS 14 8 |wt6NuT 4 SUBTOTAL 623 GENERAL 1 | CENTRE LINES 3 2 | assemeLy 10 SUBTOTAL 13 TOTAL} 92 PENALTIES (-) GRAND TOTAL EXAMINATION NUMBER EXAMINATION NUMBER: [6 Copyright reserved