Engineering Graphics and Design Grade 12 P2 2012 QP (Eng)

Downloaded from hlayiso.com INSTRUCTIONS AND INFORMATION 1. The paper consists of FOUR questions. 2. Answer ALL the questions. 3. All drawings must be drawn to scale 1:1, unless otherwise stated. 4. The questions must be answered on the answer sheets provided. 5. All the answer sheets must be re-stapled in numerical sequence and handed in irrespective of whether the question was attempted or not. 6. Careful time management is essential in order to complete all the questions. 7. Print your name in the block provided on every answer sheet. EASTERN CAPE EDUCATION DEPARTMENT 8. All answers must be drawn accurately and neatly. 9. Any details or dimensions not given must be estimated in good proportion. FOR OFFICIAL USE ONLY MODERATED NATIONAL MARK SENIOR CERTIFICATE 1 2 3 4 TOTAL GRADE 12 2 0 0 FINAL CONVERTED CHECKED BY MARK ENGINEERING GRAPHICS AND DESIGN P2 100 SEPTEMBER 2012 PREPARATORY EXAMINATIONS COMPLETE THE FOLLOWING: NAME NAME MARKS: 200 EXAMINATION CENTRE TIME: 3 hours EXAMINATION CENTRE This question paper consists of 6 pages. Copyright reserved Please turn over 1

Downloaded from hlayiso.com Engineering Graphics and Design/P2 Ns EC DBE/September 2012 Ls 144 QUESTION 1: ANALYTICAL (MECHANICAL) st 3 Given: Four parts of a torsion arm with a title block and a table of questions. Instructions: Complete the table below by neatly answering the questions, which all refer to the accompanying drawings and title block. [25] SECTION AA 1 | By who was the drawing approved? 1 2| 2. | What SI unit is used for the dimensions? 1 | aj 3. | Whats the file name of this drawing? 1 4 | inwhich street is the manufacturing company situated? 1 ° 5. | What is the tolerance allowed on the dimensions? 1 6 1 7 1 8 | Whatis the total length (C) of the arm? 1 4 9 | Determine the degree of the internal angle of the taper (D)? 1 10 | Determine the dimensions at E 1 KEY 032 x 10 11 | What type of section is shown on part 1? 1 s 42 | What type of section is shown on part 2 (SECTION AA)? 1 43 | What is the name of the part that will be used to ensure that part 4 will not 2 turn loose? | 14 | What is the size of the chamfer on part 17 1 ol ose - | 15 | What is the purpose of feature B? 2 al | 146 | Complete the parts list by printing the names for parts 3 and 4. 2 4 | | 17 | Insert the correct dimensions for part 3, 2 a | 4g |" the box below (ANSWER 18), draw, in neat freehand, the symbol for the a \ 914 6x) projection system used. 45°x4 TOTAL 25 116 ANSWER 18 26/10/2011 RODNEY CHANGE SIZE OF THREADED HOLE A ALL DIMENSIONS ARE IN MILLIMETRES. DATE CHANGED BY REVISION DESCRIPTION No (IEE GR ERNIE DRAWN BY: RIAAN DRAWING SET NO, 2 OF 3 MATERIAL: CAST IRON & MILD STEEL _ _ ‘SPECIFIED, TOLERANCES: - PARTS LIST Sse DATE; 15/09/2011 FILE NAME: SE-25/2011 HEAT TREATMENT: NONE 20,25 CHECKED BY: TAN VICTORIA STREET PART QUANTITY MATERIAL DIRK WELDING CRADOCK ALL UNSPECIFIED RADI DATE: 28/09/2011 ENGINEERING 5880 1, SPINDLE 1 CAST IRON _ APPROVED BY: ANDY wwendnweiicozs | 2. ARM ‘ MILD STEEL EXAMINATION NUMBER DATE: 19/10/2011 3. 1 MILD STEEL DRAWING PROGRAM: AUTOCAD 20%" Sout TORSION ARM 7 1 MILD STEEL EXAMINATION NUMBER 2 Copyright reserve Please tum over

Downloaded from hlayiso.com Engineering Graphics and Design/P2 Nsc. EC DBE/September 2012 QUESTION 2: LOCI (CAMS) Given: * The shaft and follower detail of an industrial cam with follower shown at its lowest posi * The vertical centre line of the cam shaft as reference on the drawing sheet. The specifications for the movement are as follow: «The cam shaft rotates anti-clockwise at constant velocity « Over the first 60° the follower rises 27 mm. « There is a dwell period for the next 60°. «Over the next 30° the follower rises a futher 28 mm * There is a dwell period for the next 45°. « Over the next 45° the follower drop 15 mm. « — There is a dwell period for the next 45°. * Over the final 75° the follower returns to its original position. Instruction: 2.1. Draw, to scale 1:1, the given view of the cam shaft and follower using the vertical centre line as reference. The arrow indicating the direction of rotation must be shown. 2.2 Drawa displacement graph with a scale of 30° equal to 10 mm and a follower displacement scale of 1:1 for the given motion. Label the graph. 2.3. Project and draw the cam profile that would generate the given motion. * Show ALL necessary construction. [38] REFERENCE LINE — CAM SHAFT AND FOLLOWER DETAIL ASSESSMENT CRITERIA 1 GRAPH 10 2 FOLLOWER +SHAFT+ | 1. ARROW + CLs. 3 CONSTRUCTION 4 4 CAM POINTS, 7 5 CURVE + QUALITY 7 TOTAL | 38 EXAMINATION NUMBER EXAMINATION NUMBER 3 Copyright reserve Please tum over

Downloaded from hlayiso.com Engineering Graphics and Design/P2 Nsc. EC DBE/September 2012 Loe 65. 30 QUESTION 3: ISOMETRIC DRAWING Given: © The front view, top view and left view of a s! that is cut by cutting plane C-C. * The position of point B on the drawing sheet. ing jig Instructions: Convert the orthographic views of the sliding jig into a scale 1 : 1 sectional isometric drawing on C-C. © Make corner B the lowest point of the drawing so that the sectional surfaces are visible. © Show ALL necessary circle and other construction [40] 30 40 15. | ry [.15_) T I L 230 55 t | 42 {60 20 80, ASSESSMENT CRITERIA 1. AUX. VIEW+PLACING | 3 2. ISOMETRIC LINES 22 3, NONISOMETRIC LINES cm 4, ISOMETRIC CIRCLES 5 5. CIRCLE CONSTRUCTION | 14 6. CENTRE LINES 2 7. HATCHING 1 TOTAL | 40 EXAMINATION NUMBER EXAMINATION NUMBER [4 Copyright reserve Please tum over

Engineering Graphics and Design/P2 Ns EC DBE/September 2012 QUESTION 4: MECHANICAL ASSEMBLY en: © The exploded isometric drawing of the parts of a machine vice, showing the position of each part relative to all the others. * Orthographic views of each of the parts of the machine vice. 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 machine vice assemb 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 top view of the base (part 1). 4.2 The top view. * ALL drawings must comply with the guidelines contained in the SABS 0111. NOTE: The jaws of the vice must be drawn 55 mm apart in the open position. * Show three faces of the M10 nu * No hidden detail is required the front view. Add the following features to the drawing: © The cutting plane AA Downloaded from hlayiso.com « Label the sectional view: SECTION A-A [97] PARTS LIST PART QUANTITY MATERIAL 1. BASE 1 CAST IRON 2. SHAFT 1 MILD STEEL 3. SLIDING BLOCK 1 CAST IRON 4, ROTATING BLOCK 1 CAST IRON 5. M10 SCREW 1 MILD STEEL 6. JAWS 2 MILD STEEL 7. MG SCREW 4 MILD STEEL 8. WASHER 1 MILD STEEL EXPLODED ISOMETRIC 9. M10 NUT 1 MILD STEEL DRAWN BY: Li54 KALIKA STREET CHECKED BY: rons www.meeng.co.za DATE: 20/09/20 THe ALL UNSPECIFIED RADII ARE R3 APPROVED BY. PIERRE MACHINE VICE DATE: 197107 EASTERN CAPE RAM DEPARTMENT BASIC EDUCATION e4 SCALE 1:2 GRADE 12 SEPTEMBER 2012 [5] Copyright reserve Please tum over

Downloaded from hlayiso.com Engineering Graphics and Design/P2 Nsc. EC DBE/September 2012 ASSESSMENT CRITERIA TOP VIEW 1. BASE 2. SHAFT 3. ROTATING BLOCK 4, M10 SCREW 5, WASHER 6. M10. NUT 7. CENTRE LINES SECTION AA SUBTOTAL a SECTIONAL FRONT VIEW THIRD ANGLE 1. BASE 2. SHAFT 3, SLIDING BLOCK 4, ROTATING BLOCK 5. M10 SCREW 6. JAWS 7. WASHER 7 8. M10 NUT 9. CENTRE LINES 10. HATCHING 11. LABEL SUBTOTAL TOTAL 97 EXAMINATION NUMBER EXAMINATION NUMBER Copyright reserve