Engineering Graphics Design P2 Feb March 2018 Eng_hlayiso.com_.pdf

basic education Department: Basic Education REPUBLIC OF SOUTH AFRICA NATIONAL SENIOR CERTIFICATE FOR OFFICIAL USE ONLY QUESTION |] MARKS OBTAINED | } | SIGN MODERATED | 3] SIGN RE-MARKING 3] sion 1 2 3 ( fy 4 i ENGINEERING GRAPHICS AND DESIGN P2 \ i i TOTAL it FEBRUARY/MARCH 2018 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

gineering Graphics and Design/P2 Downloaded from hlayiso.com ‘eb.-Mar. 2018 QUESTION 1: ANALYTICAL (MECHANICAL) Given: a4 a Three views of a two-way valve assembly and a detailed enlargement of the bush, a title block, a parts list and a table | ©) | © of questions. | | 4 a Instructions: + Complete the table below by answering the questions which all refer to the accompanying drawings and title block, \ | \ neatly, [28] ' ' toy ot Pie choo QUESTIONS ANSWERS tort ‘On what date was the drawing checked? 1 4--4--4 aap 2. | What material is used to manufacture the gland? 1 @30 | VIEW 2 What is the manufacturer's web address? 1 ENLARGED DETAIL OF BUSH 4, [How many sets of drawings are there for the two-way F; valve assembly? 5 | How many @10 holes need to be drilled in the BASE? 1 ® 6 | Give the complete title of view 1 1 7 |Name the encircled drawing feature at A. 1 ‘| M56 x4 8 | Determine the dimensions at B: Cc: D: a L ° 9 | Are views 1, 2 and 3 drawn to the indicated scale? 1 7 prec 10 | Name the encircled feature at E. 1 oe oI j ieee ed een = al & 11 | What is the purpose of the revolved section at F? 2 ott i gy mod it od ut 12 | What does the convention at G indicate? 1 1 |__ Lr 43 | How deep is the thread at H? 4 “= 14 | Why is the component at J filled in solid? 1 < 15 | Determine the total height of the assembly. 1 “ e 16 | What does the abbreviation PCD stand for? 1 ol 47 | How many surfaces of the two-way valve assembly 4 = must be machined? With reference to the tolerance, determine the n 18 1 g d minimum dimension of the shaft. . , 8X B10 holes 19 Determine the across flat (AF) distance of the 2 j s LON on 84 PCD M6 nut a t tt 90 | What surface treatment must be applied to the 4 bl a H tito M56 nut after milling? | __ loro] 2 | In the space below (ANSWER 21), draw, in neat freehand, the symbol for the projection system : 2108 used. VIEW 3 VIEW 1 TOTAL | 28 PARTS LIST ANSWER 21: Projection symbol PART QUANTITY | MATERIAL | 13/11/2016 PEDRO INSERT GLAND. 1] TITLE UNLESS OTHERWISE MILLING SPECIFIED, TOLERANCES JS 1 | BASE 1 BRASS DATE CHANGED BY | REVISION DESCRIPTION |Ne ON DIMENSIONS ARE + 0,15. Vv — -— —s§ —_ - — MILLIMETRES. DATE: 11/11/2016 3. | GLAND 1 NYLON FILE NAME: VA103/2016 DRAWING SET NO. 3 OF 4 eRe oe? RADII ere ar 616 EXAMINATION NUMBER 4 | 56 NUT 1 BRASS ALL VALVE MAIN STREET GEORGE 6520 DRAWING PROGRAM: APPROVED: TINI 5 | SHAFT 1 EN 19 MANUFACTURING www.vda.co.za DATE: 16/01/2017 EXAMINATION NUMBER 2 Copyright reserved Please tum over

stati Downloaded from hlayiso.com sos QUESTION 2: LOCI Ag Ss NOTE: Answer QUESTIONS 2.1 and 2.2. 2.1 MECHANISM. Given: *A schematic drawing of a mechanism consisting of crank AB, connecting rod BC, connecting rod CD and crank DE * The position of centre point A on the drawing sheet Specifications: © The positions of A and E are fixed Connecting rod BC is pin-joined to crank AB at B and connecting rod CD is pin-joined to connecting rod BC at C * Connecting rod CD is pinjoined to crank DE atD Motion: + As crank AB rotates in an anti-clockwise A direction, crank DE rotates in a clockwise ASSESSMENT CRITERIA 2.1 direction at the same velocity. ; 1 | Given 4 Instructions: *Draw, to scale 1: 1, the given schematic | 2 | CONSTRUCTION 4 drawing of the mechanism * Trace the locus generated by point C for ONE |_° | PONTS 6 complete rotation of the two cranks. 4 | CURVE QUALITY 2 Show ALL construction. (16) SUBTOTAL 16 2.2 HELIX Given: * The incomplete front view of the shaft and the external profiles of a chute * An auxiliary view of the chute * The position of centre point © on the drawing sheet Specifications: * Starting position —_: Bottom left | © Pitch 48 mm o * Turns ONE AND A QUARTER ASSESSMENT CRITERIA 2.2 * Direction Right-handed 1 | GIVEN + cL 1 Instructions: 2 | CONSTRUCTION 8 Draw, to scale 1 : 1, the complete front view of the chute. 3 | OUTSIDE HELIX 93 « Show ALL construction. faa NSIDE HELIX + SHAFT 3 * NO hidden detail is required. [25] | | curve quaury 3 SUBTOTAL 2.2 25 SUBTOTAL 2.1 16 PENALTIES () TOTAL | 41 EXAMINATION NUMBER, (ON | HONK A——————r_ I Copyright reserved Please tum over

Engineering Graphics and Design/P2 Downloaded from hlayiso.com _— Copyright reserved 413 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 starting point of the drawing. * Show ALL construction. * NO hidden detail is required. [37] 60° \ al 55. ASSESSMENT CRITERIA 1 | PLACEMENT + AUX View | 2d 2 | BASE + FRONT 3 3_| UPRIGHT + MIDDLE 193 4 | CIRCLE + CIRCLE 5 CONSTRUCTION + CL PENALTIES () TOTAL | 37 EXAMINATION NUMBER EXAMINATION NUMBER [4 Please tum over

Engineering Graphics and Design/P2 EXPLODED ISOMETRIC DRAWING 250 \ M24 upy 4 2 ADJUSTING COLLAR [4] BEARING [3] 168 145 SHAFT [2] 81 ASL 120" | sl { 12 12 260 FORK [6] M24 NUT [5] Copyright reserved BASE [1] 42 “es —= PIN [8] DBE/Feb.-Mar, 2018 QUESTION 4: MECHANICAL ASSEMBLY Given: * The exploded isometric drawing of the parts of a pulley jack assembly, showing the position of each part relative to all the others * Orthographic views of each of the parts of the pulley jack 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 pulley jack 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 is shown on the right view of the base (part 1). 4.2 The right view. Show only the left half of the right view by applying the convention for the presentation of a symmetrical object. NOTE: * Planning is essential. * Apply the convention of symmetry on the right view only. * ALL drawings must comply with the guidelines as contained in the SANS 10111. * The bearing (part 3) must be drawn in convention in the front view. * The bearing (part 3) must be drawn in detail, showing only TWO balls, in the right view. * The shaft (part 2) must be drawn in its lowest position so that point S will be at the indicated position. * Show THREE faces of the M24 nut in the front view. * Add cutting plane A-A © NO hidden detail is required. 194] PARTS LIST PART QUANTITY MATERIAL 1 | BASE 1 CAST IRON 2 | SHAFT 1 MILD STEEL 3 | BEARING 1 MILD STEEL ‘ADJUSTING 41 Colar 1 MILD STEEL 5 | M24 NUT 1 MILD STEEL 6 | FORK 1 CAST IRON 7 | PULLEY 1 CAST IRON 8 | PIN 1 MILD STEEL 72 PERKINS STREET JT NORTH END 6001 ENGINEERS www.jteng.coza @ 041313 1574 ALL DIMENSIONS ARE &4 IN MILLIMETRES fl Please tum over

gineering Graphics and Design/P2 Downloaded from hlayiso.com Copyright reserved DBE/Feb.-Mar. 2018 FOR OFFICIAL USE ONLY INCORRECT ORTHOGRAPHIC PROJECTION INCORRECT OVERALL SCALE INCORRECT HATCHING PARTS NOT ASSEMBLED TOTAL PENALTIES (-) ASSESSMENT CRITERIA SECTIONAL FRONT VIEW 4 | BASE 13 2 | sHarT a 3 | BEARING 6 4 |coutan 8 5 | M24 NUT 6 6 | FORK a} 7 | PULLEY 8} 8 | PIN 1 SUBTOTAL 59 RIGHT VIEW 4 | BASE 5 2 | BEARING 5 9 |coutan 8 4 | M24 NuT a 5 | FORK 3 6 | PULLEY 1 SUBTOTAL 18 GENERAL 1 | CENTRE LINES 4 2 | ASSEMBLY 7 3 | CONVENTION 3 4 | CUTTING PLANE 3 SUBTOTAL 17 TOTAL 94 PENALTIES(-) GRAND TOTAL EXAMINATION NUMBER EXAMINATION NUMBER [6