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. 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 NOVEMBER 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/November 2014 oes s 42 ayiso.com Given: QUESTION 1: ANALYTICAL (MECHANICAL) A drawing showing orthographic views of the parts of a bearing bracket assembly, a title block and a table of questions. The drawings have not been prepared to the indicated scale Instructions: 4 Complete the table below by neatly answering the questions, which all refer to the te accompanying drawing and the title block. [30] 30 | ry a H ae it q QUESTIONS ANSWERS | 1 | On what date was the drawing drawn? 1 2 | Who approved the drawing? 1 BRACKET 3 | What is the drawing number? 1 4 | Who was responsible for the revision? 1 12, 66 42 5 If the drawing was drawn to scale 1: 1, what would the 1 Riz R36 dimension at A read? 2 Ath 6 | What heat treatment is required? 1 rH | rt + 7 | What type of machining is required? 1 qT | o10 i ao lo 8 | Whatis the tolerance allowed on dimensions? 1 9 | Complete, in neat freehand, the sectional top view of the BEARING HALVES on cutting plane S-S. 3 BEARING CAP 10 | Name the encircled feature at B. 1 ANSWER 9 11 | What type of section is shown on the PULLEY? 1 fL__l] 12 | Give the complete dimensions at: C D E 3 13 | Determine the dimension at F. Show ALL calculations. 2 14 | Give the correct name of PART G 1 S 46 T s 15 | What is indicated by the encircled convention at H? 1 | (> | 46 | What is indicated by the encircled convention at J? 1 BZ, 47 | How many surfaces on the BRACKET require machining? 1 | 40 18 What is the purpose of the two shoulders on the BEARING 2 T OT HALVES? | 210 Name a part that can be added to the assembly to ensure that — 19 | the momentum is effectively carried over from the PULLEY to 2 PULLEY BEARING HALVES the SHAFT? UNLESS OTHERWISE SPECIFIED, 905 MEENS— | 20 | In the space below, draw, in neat freehand, the symbol for the projection system used. 4 TOLERANCES ON DIMENSIONS ivé ARE ¢ 0,3. TOTAL | 30 05/11 P MOOLMAN INSERT OIL HOLE 1 ALL UNSPECIFIED RADIIARE 6mm. | DRAWING PROGRAMME: AUTOCAD ANSWER 20 DATE REVISED BY DESCRIPTION OF REVISION Ne | MATERIAL: CAST IRON FILE NAME: ANAQ113.dwg 123 STRUBEN STR HEAT TREATMENT: NORMALISE DRAWING No. 01-NOV-13 Pretoria PW. cevetonments ww jpudevelopments.co za |_ APPROVED BY: K CIZAKE DATE: 2019-1204 _ - *® 012 345 6789 CHECKED BY: W GOEDE DATE: 2013-11-15 EXAMINATION NUMBER TITLE DRAWN BY: J STANDER DATE: 2013-11-04 BEARING BRACKET SCALE 1:2 EXAMINATION NUMBER [2 Copyright reserved Please turn over

Engineering Graphics and Design/P2 Downloaded from hlayiso.co QUESTION 2: LOCI NOTE: Answer QUESTIONS 2.1 and 2.2 2.1 COIL SPRING (HELIX) Given: * The right view of a coil spring with PR indicating the starting position © The position of centre point S on the drawing sheet Specifications: © Pitch = 100 * Outer diameter * Inner diameter © Spring profile © Direction Instructions: * Draw, to scale 1; 1, the given right view and the front view for ONE turn of the coil spring * Show ALL necessary construction * No hidden detail is required. [21] ASSESSMENT CRITERIA 1|GIVEN+CENTRELINES | 3 2 | CONSTRUCTION 6 3 | POINTS + CURVES 12 PENALTIES (-) SUBTOTAL 2.1 24 Copyright reserved 2.2 CAM Motion: © The follower rises with uniform motion for 20 mm over the first 60° of the rotation. © There is a dwell period for 30°. * The follower rises with simple harmonic motion for 50 mm over the next 90° of the rotation, to the maximum displacement of 70 mm © The follower descends with uniform acceleration and retardation to the original position over the rest of the rotation Instructions: * Draw, to a horizontal scale of 130 mm = 360° and a displacement scale of 1 : 1, the complete displacement graph for the required motions. * Label the graph and indicate the scale. 7) ASSESSMENT CRITERIA + | constRUCTION 63 2 | POINTS + CURVES. 94 3 | LABELS 1 PENALTIES (-) 2.2 SUBTOTAL 7 2.4 SUBTOTAL 24 ToTAL | 38 EXAMINATION NUMBER EXAMINATION NUMBER [3 Please turn over

. Engineering Graphics and Design/P2 Dow n | oad ed ft ©) m h | ay ! SO.co m DBE/November 2014 Ls QUESTION 3: ISOMETRIC DRAWING ‘8 Given: © The front view, top view and right view of a bracket © The position of point P on the drawing sheet Instructions: Using scale 1 : 1, convert the orthographic views of the bracket into a sectional isometric drawing on cutting plane S-S. * Make P the lowest point of the drawing * Show ALL necessary construction * NO hidden detail is required. [37] 60 ASSESSMENT CRITERIA 1 | AUX. VIEW + PLACING 3 2 | ISOMETRIC + NON-ISO 8 3 | HEXAGON + SQUARES 93 4 | CIRCLES + CONST. 4 5 | SECTION 5 6 | HATCHING 23 PENALTIES (-) ToTAL | 37 EXAMINATION NUMBER EXAMINATION NUMBER [4 pred IN Please turn over

Engineering Graphics and Design/P2 PCD6O F WELDING SYMBOL NOTE: DRAWN TO SCALE “4x 010 HOLES M20 NUT [2] A wf vie" EXPLODED ISOMETRIC DRAWING pp? SOCKET HEAD BOLT [8] Copyright reserved Downloaded from hlayiso.com 3.x M6 HOLES EQUALLY SPACED 3.x @6 HOLES 1 20 10 100 WASHER [3] 2130 CYLINDER [1] 240 » PCD 115 x HOLE x fl | i yao FLANGE STUD [6] 40 @30 200 ro | 220 CYLINDER HEAD [7] as a DBE/November 2014 QUESTION 4; MECHANICAL ASSEMBLY Given: * The exploded isometric drawing of the parts of a one-way valve assembly, showing the position of each part relative to all the others * Orthographic views of each of the parts of the one-way valve 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 one-way valve assembly: 4.1 A sectional front view on cutting plane A-A, as seen from the direction of the arrow shown on the exploded isometric drawing. The cutting plane, which passes vertically through the centre of the assembly, is shown on the top view of the cylinder (part 1). 4.2. The top view 4.3. The left view * ALL drawings must comply with the guidelines contained in the SANS 10111. NOTE: Proper planning is essential Draw only ONE socket head bolt in the hole marked X. * The outlet pipe (part 9) fits into the cylinder head (part 7) and must be welded in place. Show the given welding symbol on the left view * Show THREE faces and ALL the necessary construction for the M20 nut. * Show TWO faces of the inside of the socket head bolt * Add cutting plane A-A to the drawing NO hidden detail is required. 195] PARTS LIST PART QUANTITY, MATERIAL 41 | CYLINDER 1 CAST IRON 2 |M20 NUT 1 STAINLESS STEEL 3 | WASHER 1 STAINLESS STEEL 4 | VALVE PLATE 1 CAST IRON 5 | DIAPHRAGM 1 RUBBER 6 | FLANGE STUD 1 STAINLESS STEEL 7 | CYLINDER HEAD 1 CAST IRON 8 | SOCKET HEAD BOLT 3 STAINLESS STEEL 9 | OUTLET PIPE 1 STAINLESS STEEL VV Bm erneer J PRETORIA 090% ENGINEERING CC ‘www jpwengineering.co.za B ovasereo ALL DIMENSIONS ARE | ALL UNSPECIFIED IN MILLIMETRES. RADII ARE R4. [5] Please turn over

° a nloaded from hlayiso.com — PENALTIES x & THIRD-ANGLE (TA) s INCORRECT SCALE (IS) NUT CONSTRUCTION (NC) HATCHING (H) TOTAL Carry the TOTAL over to the penalties row under GENERAL. ASSESSMENT CRITERIA SECTIONAL FRONT VIEW + ] cvunoer’ 2 2 | weonur 6 3. | washer 2 4 | VALVE PLATE 93 5 | oaPHeacm 23 6 | FLANGE STUD 63 7 | cyuNoER HEAD 93 8 | SockeT HEAD BOLT 8 9 | ounerrire 4 SUBTOTAL 60 TOP VIEW + | cunoer nea at 2 | SOcKETHEAD BOLT 14 3 | ounerpire 1 ‘SUBTOTAL 6 LEFT VIEW + | crumoer 4 2 | crunoeR HEAD 3 3. | socker HEAD aout 14 4 | ouneT PIPE 14 5. | weLoinc symeou 2 6 | curtinc PLANE 3 SUBTOTAL 15 GENERAL 4] centre tines 6 2 | assemsty 8 ‘SUBTOTAL 14 PENALTIES (-) TOTAL| 95 EXAMINATION NUMBER EXAMINATION NUMBER, [6 pred MUN