Engineering Graphics and Design Grade 12 P2 2019 QP (Eng)

basic education Department « y) Basic Education "4 REPUBLIC OF SOUTH AFRICA NATIONAL SENIOR CERTIFICATE i ENGINEERING GRAPHICS AND DESIGN P2 i] i NOVEMBER 2019 MARKS: 100 TIME: 3 hours This question paper consists of 6 pages. Copyright reserved FOR OFFICIAL USE ONLY QUESTION ]] MARKS OBTAINED | } | SIGN MODERATED | 3] SIGN RE-MARKING | 3] SIGN 1 2 3 . 1 4 1 i TOTAL | ) 2])0/0 2/0/0 2])0/0 FINAL CONVERTED MARK CHECKED BY 100 oe _ INSTRUCTIONS AND INFORMATION 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. 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. ONS NO COMPLETE THE FOLLOWING: CENTRE NUMBER CENTRE NUMBER EXAMINATION NUMBER | | | Barcode label | | | | EXAMINATION NUMBER Please tum over

Engineering Graphics and Design/P2 Downloaded from hlayiso.com — eo QUESTION 1: ANALYTICAL (MECHANICAL) “gt ay Given: a Two views and a section of a mechanical jig, a title block and a table of questions. The drawing has not been prepared to ol the indicated scale stucs—~_| | | | | 2 ~\ + as Instructions: ’ Complete the table below by neatly answering the questions which refer to the accompanying drawing, the title block and q mechanical content. [30] - Rio) | [—@ QUESTIONS ANSWERS ANG 1 | What was Ingrid’s responsibility? 1 (Q) = 2 | What is the manufacturer's website address? 1 8 1 3 | Whats the file name? 1 M10 x 1,5 THREAD - MIN 18 DEEP + 4 | Who is the client? 1 Rie 5 | How many jigs must be manufactured? 1 t 2) \ stone 6 | What is VIEW 1 called? 2 CBORE 016 x4 DEEP 7 | What type of section is VIEW R-R? 1 VIEW 2 8 | Name the type of section produced by cutting plane T-T. 1 =I 9 | Determine the complete dimensions at: A B: c: D: E: 5 2 10 | Determine the total length of the jig. 1 11 | Name the feature at F. 1 226 42 | What is the minimum depth of the thread required for the hole 1 at G? 7 13 | Name the feature at H. 1 { o12) 8 a 44 | How many surfaces of the jig must be machined? 1 $3) al j : 15 | Describe the hatching mistake on VIEW 1 2 “tae ' Fl 46 | With reference to the tolerance, determine the minimum height q t t at J. VIEW R-R DIRECTION OF LAY With reference to the machining symbol below, match the letter. [ROUGHNESS VALUE 17 | on the symbol with the correct label in the column to the right of 4 } 118 this question. SAMPLING LENGTH 154 MACHINING ALLOWANCE VIEW 1 48 | In the space below (ANSWER 18), draw, in neat freehand, the symbol for the projection system used. | 4 TOTAL | 30 QUESTION 17. ‘ANSWER 18 FILE NAME: MJIG-12-V5 MATERIAL: CAST IRON POLISHED QUANTITY: 30 UNITS FINISH; i IG SCA \/ —_ . s NET? v b= POLISHED IMMISSIONED BY: ALL DIMENSIONS ARE IN MILLIMETRES f) JR MANUFACTURES: DRAWING AUTOCAD 2018 off) ee 105 FIRST AVENUE, BRITS PROGRAMME: ALL UNSPECIFIED RADII ARE 4mm. a 98 BROAD STREET | DRAWN BY: SIPHO DATE: 2018-11-13 ea /d CASTFORM MIDDELFONTEIN 4070 CHECKED BY: INGRID DATE: 2018-12-14 ENGINEERING Se ee oe | APPROVED BY. NDING! DATE: 2019-01-21 E003 645 7820 EXAMINATION NUMBER: TITLE MECHANICAL JIG BB EXAMINATION NUMBER — a 0 I

Engineering Graphics and Design/P2 Se DBE/November 2019 Downloaded from hlayiso.com | QUESTION 2; LOCI (CAM) Given: © The detail of a wedge-shaped follower and the camshaft © The position of centre point S on the drawing sheet Specifications: ¢ The follower reciprocates on the vertical centre line of the camshaft « The minimum distance from the follower to the centre of the camshaft = 17 mm Rotation = anti-clockwise Motion: The cam imparts the following motion to the follower: It descends 56 mm with uniform acceleration and retardation over the first 180° It rises 20 mm with uniform motion over the next 45° © There is a dwell period for the next 45° * It returns to its original position with simple harmonic motion over the rest of the rotation Instructions: * Draw, to scale 1: 1, the given camshaft and the wedge-shaped follower at the minimum distance. * Draw to a rotational scale of 30° = 8 mm anda displacement scale of 1 : 1, the complete displacement graph for the required motion. «Label the displacement graph and include the scale «Project and draw the cam profile from the displacement graph. * Show the direction of rotation on the cam profile * Show ALL construction and projection. [38] th FOLLOWER AND CAMSHAFT DETAIL Copyright reserved ASSESSMENT CRITERIA 1 |Genmetnes | 8 2 | GRAPH CONSTRUCTION 7 3 | DISPLACEMENT GRAPH 9 4 | CAM CONSTRUCTION 6 8 5 | CAM+ CURVE QUALITY 1 PENALTY (-) TOTAL | 38 EXAMINATION NUMBER EXAMINATION NUMBER | 3 Please tum over

a Downloaded from hlayiso.com — ae QUESTION 3; ISOMETRIC DRAWING f Given: © The front view, top view and left view of a tool jig © The position of point P on the drawing sheet Instructions: Using scale 1 : 1, convert the orthographic views of the tool jig into an isometric drawing. * Make P the lowest point of the drawing * Show ALL construction. NO hidden detail is required. [41] 20 | 40 | | 304.20 { iL! it sg im 3 P | 20_|.20.| _ 30 -20_| \ 60. al rr . 60" + = ‘R20 2 7 ba g 20_/10) 10|_ 20, pP P 40 40 80 120 ASSESSMENT CRITERIA 1 | PLACEMENT + AUX. VIEW 3 2 =| FRONT PORTION 11 3. | BACK PORTION 213 4 [GonstRUCTION +L 54 PENALTIES (-) TOTAL | 41 EXAMINATION NUMBER EXAMINATION NUMBER 4 — ‘000000 0 ll

a Downloaded from hlayiso.com i ‘AN EXAMPLE OF THE CONVENTIONAL, QUESTION 4: ASSEMBLY DRAWING 8x @8 HOLES CSINK REPRESENTATION OF A SPUR GEAR oy 2x1.5 DEEP 14 CSINK ™S_AT 90° AT 90° TO B14 Given: * The exploded isometric drawing of the parts of a gear and sump assembly, showing the position of each part relative to all the others. * Orthographic views of each of the parts of the gear and sump assembly * An example of the conventional representation of a spur gear M8 SCREW [11] Instructions: * Answer this question on page 6. © Draw, to scale 1: 1 and in third-angle orthographic 40 Ea projection, the following views of the assembled parts of 220 ind Tur I= the gear and sump assembly: T 7 4.1 The half-sectional front view on cutting plane A-A. os Show the left half in section, as seen from the |-—_282 _.| direction of the arrow on the exploded isometric | drawing. The cutting plane is shown on the top view of +o —— the spur gear (part 3). 4.2 The top view. Show only the top half of the view by B20 WASHER [2] | (222 | SeARS HAVE BEEN OMITTED applying the convention for the presentation of a |- 282 | FOR PURPOSE OF CLARITY symmetrical object NOTE: * Planning is essential. * ALL drawings must comply with the guidelines as contained in the SANS 10111. os © Show THREE faces of the M20 nut (part 1). 4 en © Draw the conventional representation of the spur gear _————— ¥ Se = ef (part 3) in both views. 66 © NO hidden detail is required 193] PIN [BI COLLAR [7] Bx MB HOLES PARTS LIST PART ‘QUANTITY MATERIAL + M20 NUT 1 MILD STEEL a 2 | WASHER 1 MILD STEEL e 3 | SPUR GEAR 1 CAST IRON 4 | SHAFT 1 CAST IRON ie 5 |BusH 1 MILD STEEL 6 | COLLAR PLATE 1 MILD STEEL SHAFT [4] 7 [cour 1 MILD STEEL 8 |PIN 1 MILD STEEL. 9 | SUMP. 1 CAST IRON 10 | PLUG 1 CAST IRON 11 | Ms SCREW 8 MILD STEEL = 98 BROAD STREET CASTFORM sanono sees 4070 ENGINEERING (PTY) LTD www foundry.co.za ar GEAR AND SUMP ASSEMBLY 0) v 52 PLUG [10] SUMP [9] EXPLODED ISOMETRIC DRAWING ALL DIMENSIONS ARE| ALL UNSPECIFIED Leased O00 00 0 000 Please tum over

a Downloaded from hlayiso.com — Q3 FOR OFFICIAL USE ONLY ge INCORRECT OVERALL SCALE INCORRECT HATCHING PARTS NOT ASSEMBLED TOTAL PENALTIES (-) ASSESSMENT CRITERIA TOP VIEW 1 | GEAR 6 2 | COLLAR PLATE i 3 |Wwasher” | 43 4 | SYMMETRY 1 SUBTOTAL 12 SECTIONAL FRONT VIEW 4 | sump 165 2 | PLUG 7 3 |COLLARPLATE | 43 4 | BUSH 3 5 | COLLAR + PIN 5 6 | SHAFT 93 7 | GEAR 10 8 |Wwasner” | 62 9 | Ms scREW 6 SUBTOTAL 68 GENERAL 4 | CENTRE LINES 3 2 | ASSEMBLY 10 SUBTOTAL 13 TOTAL} 93 PENALTIES (-) GRAND TOTAL EXAMINATION NUMBER — wv 000 0 aR Is