Engineering Graphics and Design Grade 12 P2 2017 QP (Eng)

basic education Department: Basic Education REPUBLIC OF SOUTH AFRICA NATIONAL SENIOR CERTIFICATE FOR OFFICIAL USE ONLY QUESTION |] MARKS OBTAINED | } | SIGN MODERATED |} sicn RE-MARKING | 3] SIGN 1 2 3 i \ 4 i ENGINEERING GRAPHICS AND DESIGN P2 \ H i TOTAL it NOVEMBER 2017 j 2|0/0 2|0|0 2|0/0 MARKS: 200 FINAL CONVERTED MARK CHECKED BY TIME: 3 hours 100 “1 This question paper consists of 6 pages. Barcode label 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. Proper planning 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 NOn COMPLETE THE FOLLOWING: CENTRE NUMBER CENTRE NUMBER EXAMINATION NUMBER Copyright reserved EXAMINATION NUMBER Please tum over

snc Downloaded from hlayiso.com a 37 QUESTION 1; ANALYTICAL (MECHANICAL) y < Given: | i Five views and a detailed enlargement of a shifting spanner assembly, a parts list, a title block and a table of questions. The drawings have not been prepared to the indicated scale. VIEW 5S i Instructions: Complete the table below by neatly answering the questions which all refer to the accompanying drawing and the title block. [28] QUESTIONS ANSWERS RIG What is the title of the drawing? What scale is indicated for the drawing? What drawing program was used? On what date was the drawing drawn? Who approved the drawing? What is the radius of the unspecified curves? What material is used to manufacture the adjustable jaw? What type of heat treatment is required for the jaws? ola|nlojalasoe|r Which projection system has been used for the drawing? Determine the dimension at A. a|s Measure the angle at B. What is the purpose of the measurements on the fixed jaw and iB handle at C? ny 80 13 | Name the type of section at D. 14 | Name the type of section at E. DETAIL W 15 | What is purpose of the grooves at F? 16 | If view 2 is the front view, what would view 4 be called? ‘| 417 | What is the purpose of the enlarged detailed view? 18 | What type of section resulted from cutting plane S-S? 49 With reference to the tolerance, determine the minimum dimension at G. How many surfaces of the fixed jaw and handle must be 3 20 =| = machined? 191 | What direction of lay must be applied to the machined VIEW 1 VIEW 2 VIEW 3 VIEW 4 surfaces? In the space below (ANSWER 22), draw, in neat freehand, the conventional representation of a 22 | bearing on a section of a shaft. PARTS LIST DRAWING PROGRAM: AUTOCAD 2017 TOTAL | 28 SCALE 1:1 PART QUANTITY MATERIAL ALL UNSPECIFIED RADII ARE R2. ANSWER 22: Conventional representation of a bearing on a section of a shaft 1 | FIXED JAW AND HANDLE. 1 CHROME VANADIUM CASTING | APPROVED: STEYN DATE: 2017-02-28 2 | ADJUSTABLE JAW 1 TOOL STEEL CHECKED: JOHN DATE: 2017-02-10 3 | woRM SCREW 1 EN 19 DRAWN: WERNER DATE: 2017-01-08 4 | WORM SHAFT 1 TOOL STEEL TITLE HEAT TREATMENT ON ALL JAWS — | HARDENING SHIFTING SPANNER EXAMINATION NUMBER EXAMINATION NUMBER [2 METHOD OF MACHINING MILLING WA Copyright reserved UNM WO Please tum over

Engineering Graphics and Design/P2 DBE/November 2017 Downloaded from hlayiso.com QUESTION 2; LOCI (CAM) Given: The detail of a wedge-shaped follower and the camshaft Specifications: The follower reciprocates on the horizontal centre line of the camshaft © The minimum distance from the follower to the centre of the camshaft = 14 mm * Rotation = clockwise Motion: The cam imparts the following motion to the follower: elt moves left with uniform acceleration and retardation for 40 mm over the first 180° elt moves further left with uniform motion for 15 mm over the next 90° elt moves right with simple harmonic motion back to the original position for 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 and a 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 [40] 8 ASSESSMENT CRITERIA GIVEN + MINIMUM DISTANCE + CL 5 2 | GRAPH CONSTRUCTION 7 3 | PLOTTING POINTS + " GRAPH CURVES 4 | CAM CONSTRUCTION 6 5 | PLOTTING OF CAM 7 6 | CAMPROFILE 4 PENALTIES (-) TOTAL} 40 EXAMINATION NUMBER EXAMINATION NUMBER 3 Copyright reserved Please tum over

Engineering Graphics and Design/P2 Ge Downloaded from hlayiso.com Copyright reserved 110 DBE/November 2017 QUESTION 3: ISOMETRIC DRAWING Given: The front view, top view and left view of a guide © The position of point B on the drawing sheet Instructions: Using scale 1 : 1, convert the orthographic views of the guide into an isometric drawing. © Make B the lowest point of the drawing * Show ALL construction. * NO hidden detail is required. [36] 25, 30 30° /30% ERAAL 18 i ASSESSMENT CRITERIA 1 | PLACEMENT + AUX. View | 2 2 | FRONT + REAR 18 3 | MIDDLE SECTION 10 4 | CIRCLE + CIRCLE 6 CONSTRUCTION + CL PENALTIES () TOTAL | 36 EXAMINATION NUMBER EXAMINATION NUMBER 4 Please tum over

Engineering Graphics and Design/P2 Downloaded from hlayiso.com 32 R10 150 126 86 ° tal Tr} 3, 8) 8 SSS Se 8 A —_ i 2 x 610 HOLES / ( 32 12 PLACE (S) HERE URIS EXPLODED ISOMETRIC DRAWING M10, Tes JAW [5] @20 ————<—_———— ‘26 LEVER [8] DBE/November 2017 QUESTION 4; MECHANICAL ASSEMBLY Given: * The exploded isometric drawing of the parts of a pipe clamp assembly, showing the position of each part relative to all the others * Orthographic views of each of the parts of the pipe clamp 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 gs. 24 parts of the pipe clamp assembly: 41 A half-sectional front view on cutting plane HOOK [4] A-A. Show the left side in section, as seen from the direction of the arrow shown on the exploded isometric drawing. The cutting plane is shown on the top view of the base (part 1). 4.2 The top view NOTE: * Planning is essential * ALL drawings must comply with the guidelines as contained in the SANS 10111. * The convention of symmetry may not be applied The worm screw (part 7) must be completely screwed into the frame (part 2) so that point $ will be at the indicated position M10 BOLT [6] * The lever (part 8) must be placed in the centre of the worm screw (part 7). ln the top view, draw only the right-side M10 bolt. 2 was Show TWO faces of the bolt. aly * Add cutting plane A-A. es # NO hidden detail is required. [96] t \, 920 * “| EEE t PARTS LIST am) PART QUANTITY | MATERIAL 3] ©—/]!]] © 1 | BASE 1 CAST IRON M20 8 © 4 2 | FRAME 1 MILD STEEL i 1 Ed 3 [Pw 2 vio STEEL i | t 4 | HOOK 1 MILD STEEL o16 5 | saw 2 TOOL STEEL WORM SCREW [7] 6 | M10 BOLT 2 TOOL STEEL 7 | worm scREW 1 HARDENED STEEL 8 | LEVER 1 HARDENED STEEL VON WHEILIG STREET WR ALIES PARK 1791 ALL DIMENSIONS _ | DRAWN: WILLEM PROJECTS www.sn_king.co.za ARE IN MILLIMETRES | DATE; 10/11/2016 @_069 313 1574 THLE FILLETS ARE R3 AND | DRAWING PROGRAM: PIPE CLAMP &4 ROUNDINGS ARE R5 CAD 2016 [5] Copyright reserved Please tum over

gineering Graphics and Design/P2 DBE/November 2017 Downloaded from hlayiso.com FOR OFFICIAL USE ONLY INCORRECT ORTHOGRAPHIC PROJECTION INCORRECT OVERALL SCALE INCORRECT HATCHING PARTS NOT ASSEMBLED TOTAL PENALTIES (-) ASSESSMENT CRITERIA TOP VIEW 1 | BASE 8 2 | FRAME 5 3 | HOOK 5 4 | JAW + M10 BOLT 6 3 | woRMscrews | SUBTOTAL 284 SECTIONAL FRONT VIEW 1 | BASE co 2 | FRAME 8 3 | PINS + HOOK 34 4 | JAW + M10 BOLT 5 5 | WORM SCREW co 6 | LEVER 3 SUBTOTAL 43 GENERAL 4 | CENTRE LINES 103 2 | ASSEMBLY 9 3 | CUTTING PLANE 5 SUBTOTAL 244 TOTAL 96 PENALTIES (-) GRAND TOTAL EXAMINATION NUMBER EXAMINATION NUMBER Copyright reserved