Engineering Graphics and Design Grade 12 P2 2015 QP (Eng)

basic education Department « y) Basic Education "4 REPUBLIC OF SOUTH AFRICA NATIONAL SENIOR CERTIFICATE if ENGINEERING GRAPHICS AND DESIGN P2 \ it NOVEMBER 2015 } MARKS: 100 TIME: 3 hours This question paper consists of 6 pages. 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 completed using 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. NOARON> FOR OFFICIAL USE ONLY QUESTION |] MARKS OBTAINED | } | SIGN MODERATED 3] SIGN RE-MARKING 3] 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 Copyright reserved Please tum over

Engineering Graphics and Design/P2 cg Downloaded from hlayiso.com DBE/November 2015 QUESTION 1; ANALYTICAL (MECHANICAL) Given: Three views and two detailed enlargements of a tapping valve assembly, a title block and a table of questions. The drawings have not been prepared to the indicated scale. {od ' i Instructions: / | Complete the table below by neatly answering the questions, which all refer to the accompanying drawings and | L_ Ly the title block. [30] 4 \ 1 n —— | ~ 4 | Whatis the title of the assembly? 1 a | Y ‘ 2 | On what date was the drawing drawn? 1 S| oO / \ 3. | What is the drawing number? 1 DETAILS | | \ Zi) | 4 | What scale is indicated for the drawing? 1 : ia A) 5 | Which drawing program was used? 1 _— | /~ © 6 | Who approved the drawing? 1 oo " 7 | What materlal is used to manufacture the main base? 1 DETAILT 8 | What would VIEW 2 be called? 1 9 |How many socket head bolts are there in the assembly? 1 SAL BL ws 40 | Give the complete dimensions at A B c 3 | jl 11 | Name the feature at F. 1 IT + 8 T 42 | Name the type of section at D. 1 ‘ _ > | eas Sort 13 | Why is the component at E filled in solid? 1 on 8 44 | What is the total height of the assembly? 1 ql 05 | | i 15 | What is the purpose of the two enlarged detailed views? 2 if CTI 16 | What is indicated by the convention at G? 1 93 | | With reference to the tolerance, determine the maximum 17 | ee > 2 | ; dimension at H va) -— pe With reference to the tolerance, determine the minimum t , « LY a 18 | dimension at H? 2 LC f t 19 | Insert the cutting plane on VIEW 3 and label it A-A. 3 2 ] a2 5 20 |In the space provided below, draw, in neat freehand, the symbol for the projection system A — —— used 5 26 RI TOTAL | 30 VIEW 2 VIEW 3 PARTS LIST FILE NAME: RCOMVK 0002.6wg TITLE ‘ANSWER 20 PART QUANTITY MATERIAL, DRAWING No. 2015 - A - 005 TAPPI NG VALVE 1 | VALVE ASSEMBLY 1 REF: DETAILED DRAWING ALL DIMENSIONS ARE IN MILLIMETRES. APPROVED: ANDREW BRAND 2015/01/23 2 SOCKET HEAD BOLT 3 TOOL STEEL DRAWING PROGRAM: AUTOCAD 2015 CHECKED: SOON DENTON 2015/01/16 rs 3 SQUARE BOLT WITH PUNCH 1 TOOL STEEL MATERIALS: STEEL, PEWTER AND RUBBER DRAWN: CHRISTI GREEF 2015/01/05 4 [MAIN BASE 1 PEWTER 15 EDISON BLVD TAP VALVE TO BE USED FOR > ler 7 PEWIER ReCO REFRIGERATION meustriat rari | tapping oF 1340, Rt, R22 AND SyMBoL 1914 501 REFRIGERANTS IN COPPER EXAMINATION NUMBER 6 O-RING 1 RUBBER: PIPE ONLY —— = LULA — a rr Copyright reserved SE RUM A Please tum over

Engineering Graphics and Design/P2 DBE/November 2015 SCHEMATIC DRAWING Downloaded from hlayiso.com QUESTION 2: LOCI NOTE: Answer QUESTIONS 2.1 and 2.2. 2.1 MECHANISM Given: * A schematic drawing of a mechanism consisting of gear A and gear B as well as a slotted bar CD, attached at C to gear A © The position of pin E on gear B © The position of centre point F Motion: As gear A rotates in an anti-clockwise direction, it drives gear B in a clockwise direction. The slotted bar CD slides over pin E during the rotation Instructions: * Draw, to scale 1:1, the given schematic drawing of the mechanism. * Trace the locus generated by point D for ONE complete revolution of the mechanism. * Show ALL necessary construction. [19] FOLLOWER DETAIL 2.2 CAM Given: © The detail of a roller-ended follower, drawn to a reduced scale * The displacement graph and the cam shaft, drawn to scale 1 : 1, in the correct position Specifications: * The follower reciprocates along the 30° centre line that runs through the centre of the cam shaft * Rotation = clockwise Instructions: * Draw, to scale 1: 1, the roller-ended follower in its correct position. * Project and draw the cam profile from the given displacement graph. * Show the direction of rotation on the cam profile. * Show ALL necessary construction. [21] esgaegeee28 8888 DISPLACEMENT GRAPH SCALE 6 mm = 30° Copyright reserved ASSESSMENT CRITERIA 2.1 1|GIVEN+CENTRELINES | 5 2 | CONSTRUCTION 6 3 | POINTS + CURVE 8 SUBTOTAL 21| 19 ASSESSMENT CRITERIA 22 4 | CONSTRUCTION + 5 FOLLOWER + DIRECTION 2 | PLOTTING 7 3 | CAM PROFILE 6 SUBTOTAL22| 21 PENALTIES (-) TOTAL} 40 EXAMINATION NUMBER EXAMINATION NUMBER [3 Please tum over

Engineering Graphics and Design/P2 cg Downloaded from hlayiso.com DBE/November 2015 QUESTION 3: ISOMETRIC DRAWING Given: ©The front view, top view and left view of a woodworking plane * The position of point P on the drawing sheet Instructions: Using scale 1: 1, convert the orthographic views of the woodworking plane into a sectional isometric drawing on cutting plane A-A. * Make P the lowest point of the drawing * Show ALL necessary construction. * NO hidden detail is required. [34] 78 45 30 36 >| 55 fs Copyright reserved ey 3 3 LIP | ASSESSMENT CRITERIA 1 [cxcne 3 2 | Nonisovetnic 124 3 | HEXAGON 23 4 | CIRCLES + 6 CONSTRUCTION + CL 5 | SECTION 8 6 | HATCHING 2 PENALTIES (-) ToTAL | 34 EXAMINATION NUMBER EXAMINATION NUMBER [4 Please tum over

Engineering Graphics and Design/P2 Downloaded from hlayiso.com — O12 100 28 O12 WORM SCREW [1] EXPLODED ISOMETRIC DRAWING lat) Lf ona M24 f LEVER [2] END RING [3] 8 HOLE =| PLACE(R) HERE — //-— PLACE (T) HERE / PLACE (S) HERE 38 15 | 75. 136 Copyright reserved PLACEMENT OF STRONG ARMS 136 M8 BOLT [6] AF12 QUESTION 4: MECHANICAL ASSEMBLY Given: * The exploded isometric drawing of the parts of a bearing puller assembly, showing the position of each part relative to all the others * Orthographic views of each of the parts of the bearing puller assembly Instructions: * Answer this question on page 6 Draw, to scale 1 : 1 and in thirdangle orthographic projection, the following views of the assembled parts of the bearing puller assembly: 4.1 Ahalf sectional front view according to cutting plane 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 beam (part 4) 4.2 The top view. *ALL drawings must comply with the guidelines as contained in the SANS 10111 NOTE: © The two strong arms (part 5) must be placed against the cylindrical part of the beam (part 4) so that points R and T will be at the indicated positions. * The worm screw (part 1) must be completely screwed into the beam (part 4) so that point S will be at the indicated position. © The lever (part 2) must be placed in the centre of the worm screw (part 1), * Draw only the rear M8 bolt, as indicated by the exploded isometric drawing * Show THREE faces of the head of the M8 bolt in the front view. * Add the cutting plane A-A to the drawing * NO hidden detail is required [96] PARTS LIST PARTS, QUANTITY MATERIAL, 1 | WORM SCREW 1 HARDENED STEEL 2 | LEVER 1 HARDENED STEEL 3 | END RING 1 MILD STEEL 4 | BEAM 1 HARDENED STEEL 5 | STRONG ARM 2 HARDENED STEEL 6 | Ma BoLt 2 MILD STEEL 8 VON WHEILIG STREET www.sn_king.co.za SN KING CC BH ovo 1574 BEARING PULLER 5 Please tum over

a Downloaded from hlayiso.com — . FOR OFFICIAL USE ONLY Ce NOT IN THIRD ANGLE INCORRECT OVERALL SCALE INCORRECT HATCHING PARTS NOT ASSEMBLED PARTS DRAWN FREEHAND TOTAL PENALTIES (-) ASSESSMENT CRITERIA TOP VIEW 1 | WORM SCREW 3 2 | LEVER 4 3 JENDRING 3 4 | BEAM 43 5 | STRONG ARM 10 6 | Me BOLT 7 SUBTOTAL | 32 SECTIONAL FRONT VIEW 1 | woRM scREW 15 2 | LEVER 7 3 | END RING 3 4 [BEAM 3} 5 | STRONG ARM 103 6 | Mg BOLT 9 SUBTOTAL | 50 GENERAL 1 | CENTRE LINES 3 2 | ASSEMBLY 6 3. | CUTTING PLANE 5 SUBTOTAL | 14 TOTAL| 96 TOTAL PENALTIES(-) GRAND TOTAL EXAMINATION NUMBER HINO A Sauron ——T8