Engineering Graphics and Design Grade 12 P2 2014 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 2014 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 DBE/Feb, - Mar. 2014 [— 6x M8 EQUI-SPACED HOLES ON 64 PCD 38 48 6 x M8 EQUI-SPACED HOLES ON 78 PCD 116 _Downloaded from hlayiso.com — QUESTION 1: ANALYTICAL (MECHANICAL) Given: A detailed drawing showing THREE views of a carburettor body, a title block and a table of questions. The drawing has not been prepared to the indicated scale. Instructions: Complete the table below by neatly answering the questions, which all refer to the accompanying drawing and title block. [30] QUESTIONS ANSWERS How many carburettor bodies must be produced? From what material is the carburettor body manufactured? What is the file name of the drawing? On what date was the drawing checked? In which province is the engineering company situated? Name the line at 1 Name the encircled feature at 2. What is the width of the feature at 3? clalrlolalale|r Name the feature at 4. s What is the radius of the feature at 5? What would the dimension at 6 be if a drawing scale of 1 : 1 was used? What is the angle between the centre lines marked X and Y in 12 VIEW 1? 13 | What type of section is shown in VIEW 3? VIEW 2 VIEW 3 PROGRAMME: AUTOCAD MATERIAL: ALUMINIUM SCALE: 1:5 FILE NAME: 562 CB - SS.dwg QUANTITY: 18000 UNITS ALL UNSPECIFIED RADII ARE 2,5 mm. 14 | How many threaded holes are there on the carburettor body? 15 | What does the abbreviation PCD stand for? 16 | How many surfaces need to be machined? 17 | What direction of lay is indicated by the machining symbol? 18 | Insert the cutting plane for VIEW 3. Label the cutting plane A-A. 19 | Determine the complete dimensions at: A B c alelnr D E 20 projection system used In the space provided in the title block (ANSWER 20), draw, in neat freehand, the symbol for the TOTAL | 30 DRAWING No. YAP 356 TREATMENT: NORMALISE ALL DIMENSIONS ARE IN MILLIMETRES. MACHINED REMOVE ALL BURRS AND SHARP 5 ANSWER 20 1051 BRAKEN ROAD LITTLE FALLS GAUTENG 1735 ‘011.355 1550 DYNAMIC ENGINEERING REVISIONS DATE DRAWN: MARYNA, 2013/09/10 CHECKED: ANDY TITLE CARBURETTOR BODY 2013/10/12 APPROVED: MVE EXAMINATION NUMBER 2013/10/22 Copyright reserved ina EXAMINATION NUMBER [2 Please turn over

Engineering Graphics and Design/P2 Downloaded from hlayiso.com es Copyright reserved QUESTION 2: LOCI Given: The detail of the roller-ended follower for a disc cam. Specifications: The minimum distance from the centre of the cam shaft to the cam profile = 20 mm * Camshaft = @ 20 mm * Rotation = clockwise Motion: The disc cam rotates at constant velocity imparting the following uniform motion to the roller-ended follower: © Over the first 60° the follower is at rest. * Over the next 60° the follower rises to a height of 57 mm. * There is a dwell period for the next 45° * Over the next 45° the follower falls 20 mm. © There is a dwell period for the next 60° * Over the final 90° the follower returns to its original position. Instructions: * Using a horizontal scale of 30° equal to 8 mm and a displacement scale of 1 : 1, draw the displacement graph for the given motion. * Label the displacement graph and include the scale Draw, to scale 1 : 1, the given roller-ended follower in the correct position Project and draw the cam profile from the displacement graph. Show the direction of rotation on the cam profile. * Show ALL necessary construction [36] oa 60. KK oie ASSESSMENT CRITERIA 1 | DISPLACEMENT GRAPH | 10 FOLLOWER, ARROW, 2 | SHAFT + CENTRE LINES 9 + MIN DIST. + ROTATION 3 | CONSTRUCTION 4 4 | ROLLER + PROFILE 13 TOTAL 36 EXAMINATION NUMBER EXAMINATION NUMBER [3 Please turn over

Engineering Graphics and Design/P2 Downloaded from hlayiso.com DBE/Feb, - Mar. 2014 WE Copyright reserved QUESTION 3: ISOMETRIC DRAWING Given: © The front view and top view of a jig © The position of point S on the drawing sheet Instructions: Using scale 1 : 1, convert the orthographic views of the jig to an isometric drawing. * Make S the lowest point of the drawing. * Show ALL necessary construction * NO stencils may be used NO hidden detail is required. [41] "ey | | _= Hy aa a 58 oo i” § Sf 10,20 30 S 8 oo { @ & 4 70 ASSESSMENT CRITERIA 4 | AUX. + PLACEMENT 2 2 | FRONT 19 3 | MIDDLE 14 4 | CONSTR. + CIRCLE 6 TOTAL 41 EXAMINATION NUMBER EXAMINATION NUMBER [4 Please turn over

seimenseuneseaeap Downloaded from hlayiso.com seen sa 414 QUESTION 4: MECHANICAL ASSEMBLY ar AHOLES 012 Given: * The exploded isometric drawing of the parts of an air pump aa assembly, showing the position of each part relative to all 1-242) 50 : yes the others 18, S ze 1 j) fre AIR PUMP EE C | 24 A 1{ | a Orthographic views of each of the parts of the air pump s ng) Fay -— 4 assembly i I w R36 7 7 ote <o36 Instructions: | H —-/18 « Answer this question on page 6. H | si Draw, to scale 1: 1 and in third-angle orthographic H H CRANK SHAFT [7] projection, the following view of the assembled parts of the M12 BOLT [1] i i air pump assembly: A sectional front view on cutting plane A-A, as seen from CYLINDER pM2LHOLE 7 DEEP O54 the direction of the arrow shown on the exploded isometric. M4] _ drawing. The cutting plane, which passes through the vertical centre of the assembly, is shown on the top view of the crank case (part 5) 036 * ALL drawings must comply with the guidelines contained in or 24 { the SANS 10111. a NOTE: @. Show THREE faces of the M12 bolt on the left of the | assembly. T * Show TWO faces of the M12 bolt on the right of the 14 954 assembly. WASHER [2] BUSH [6] ea pee | * Show ALL necessary construction for the bolts. NO stencils _4xM12 HOLES or may be used = * NO hidden detail is required. 193] e PARTS LIST "| | PART QUANTITY MATERIAL 04 4. BOLT 4 HARDENED STEEL A 2. WASHER, 4 MILD STEEL 3. CYLINDER HEAD 1 CAST IRON 4. CYLINDER 1 HARDENED STEEL 5. CRANK CASE 1 CAST IRON 6. BUSH 1 BRONZE H oe 7. CRANK SHAFT 1 HARDENED STEEL i 1 H rS> 8. PISTON RING 1 HARDENED STEEL | PAN 9. PISTON 1 ALUMINIUM 8 Li — ub 10. CRANK CASE 8 | C —_ @60 al . _.| Ls 1051 BRAKEN ROAD — LITTLE FALLS - DYNAMIC “ae 64 ENGINEERING 1735 CRANK CASE [5] CRANK CASE COVER [10] 011 355 1850 EXPLODED ISOMETRIC DRAWING INMLUIMETRES. | RADIARE Ra, © &4 5 0 Copyright reserved Please turn over

Downloaded from hlayiso.com sca Engineering Graphics and Design/P2 ASSESSMENT CRITERIA SECTIONAL FRONT VIEW posse | osraneo | sien | wonerareo 1 [nase 18 2 | exnoer 9 3 | ovunoer 5 4 | onanic case 13 5 | suse 3 6 | cranksiarr | 9 7 | piston rans 1 8 | piston 6 Eee= |_s H | Haroun 15 SUBTOTAL 81 GENERAL 1 |cenmretnes | 3 2 | ASSEMBLY 9 SUBTOTAL 12 TOTAL 93 EXAMINATION NUMBER: i 0 SvanNATONNONEER [6 Copyright reserved