Engineering Graphics and Design Grade 12 P2 2016 QP (Eng)

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conten Downloaded from hlayiso.com _— 2 y QUESTION 1: ANALYTICAL (MECHANICAL) Given: A. detailed drawing of a pipe connecting piece, a title block and a table of questions. The drawings have not been prepared to the indicated scale. Instructions: Complete the table below by neatly answering the questions, which all refer to the accompanying drawings and the title block. [30] QUESTIONS ANSWERS 1 | On what date was the drawing checked? 1 VIEW 1 2 | What is the name of the engineering firm? 1 3 | Which indicated scale has been used? 1 4 | What treatment must the pipe connector undergo? 1 5 | On what date was the base angle revised? 1 6 | What is the drawing number? 1 7 | What would view 1 be called? 1 8 | How many surfaces need to be machined? 1 9 | What roughness value is required on the machined surfaces? 4 10 | What is the depth of the thread on a standard M12 nut? 1 11 | How many threaded holes are there on the pipe connector? 1 12 | What type of Section would cutting plane S-S produce? 1 43 | What type of curve is shown at 1? 4 14 | Name the encircled feature at 2. 1 15 | Whatis the thickness of the feature at 3? 2 16 | Name the feature at 4. 2 FRONT VIEW VIEW 2 17 | Name the type of sectioning at 5. 2 18 | Determine the angle between centrelines at 6. 2 19 | Determine the complete dimensions: A B Cc D 4 20 | In the box below, draw, in neat freehand, the symbol for the projection system used. 4 ‘ALL UNDIMENSIONED RADII R 5. TOTAL 30 ALL DIMENSIONS ARE IN MILLIMETRES. | SCALE: 1:2 PROGRAMME: AUTOCAD 2015 MATERIAL: CAST IRON ANSWER 20 FILE NAME: pipe con1.dwg QUANTITY: 1 500 UNITS DRAWING No. PC3-25 TREATMENT: HARDEN FINISH: REMOVE ALL BURRS 025 MILLING 2. BASE HOLES @13 2015/09/20 ——-—— = AND SHARP EDGES VW TANGLE OF BASE | 2015/09/15 GENERAL cegevtronee REVISIONS DATE PORT ELIZABETH | DRAWN: JOHN 2015/09/10 SYMBOL ENGINEERING 6000 ® oat 336 1600 | CHECKED: WEST 2015/0912 TE TILE APPROVED: KEN 2015/09/22 PIPE CONNECTING PIECE —_ 7 Copyright reserved Please tum over

Engineering Graphics and Design/P2 Downloaded from hlayiso.com ee QUESTION 2: LOCI (CAM) Given: * An incomplete displacement diagram of a cam. *The centre point for the cam profile and a reference point on the answer sheet. Motion: The follower rises, with uniform acceleration and retardation over the first 180°(A), to a maximum height of 56 mm. * There is a dwell period for the next 30°(B). © The follower descends with uniform motion over the next 60°(C), for 22 mm. © The follower descends, with simple harmonic motion, to the original position over the rest of the rotation(D). Instructions: * Draw, to a horizontal scale of 96 mm = 360° and a displacement scale of 1 : 1, the complete displacement graph for the required motion. Using the cam displacement diagram, determine the cam profile of a wedge shaped follower. Complete the cam profile by using the following specifications: * The cam rotates clockwise. * Minimum displacement radius = R15. * Camshaft diameter = 220. * Show ALL necessary construction. * Show the direction of the cam rotation. «Label the displacement diagram and insert the scale. [34] 56 | 60" [1207/180"| 30° 90° 150° 210° 270° 330° as ele|o | ASSESSMENT CRITERIA GRAPH DIVISIONS + CONSTR GRAPH 15 MIN. DIST, C’LINES + 12 DIV + ARROW PLOTTING POINTS & 3 | cURVE 9 8 4 | LABEL 2 TOTAL} 34 NAME NAME [3 Copyright reserved Please turn over

Engineering Graphics and Design/P2 xo ae é Downloaded from hlayiso.com ee QUESTION 3: ISOMETRIC DRAWING Given: * The front view, top view and left view of a bracket © The position of point S on the drawing sheet Instructions: Using scale 1 : 1, convert the orthographic views of the bracket to a isometric drawing. * Make S the lowest point of the drawing. * Show ALL necessary construction. * NO hidden detail is required. [37] 25 80 30 25 120 60 ASSESSMENT CRITERIA 1 | AUX' VIEWS + PLACING 3 2 | 1S" LINES - BASE 143 3 | HEXAGONAL PRISM at 4 | CIRCLE + CONSTR 8 TOTAL 37 NAME NAME, [4 Copyright reserved Please turn over

Engineering Graphics and Design/P2 @10 am = NUT [6] 220 ee WASHER [7] o10 “et o14 46 69 Ce BOLT [9] Downloaded from hlayiso (ote) 78 50. mM FORK [2] CIRCLIP [5] EXPLODED ISOMETRIC DRAWING QUESTION 4: MECHANICAL ASSEMBLY Given: © The exploded isometric drawing of the parts of a pulley assembly, showing the position of each part relative to all the others * Orthographic views of each of the parts of the pulley 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 assembly: 4.1 The sectional front view of the pulley assembly, on cutting plane A-A as seen from the direction of the arrow shown on the exploded isometric drawing. The cutting plane, that runs vertically through the centre of the assembly, is shown on the top view of the fork (part 2) 4.2 A top view without any hidden detail * ALL drawings must comply with the guidelines contained in the SANS 10111. NOTE: * Place the fork in a horizontal position in the sectional front view. * Show, in the sectional front view, THREE faces of the M10 bolt and two faces of the M10 nut and ALL necessary construction. * NO hidden detail is required. Add the following features to the drawing: © The cutting plane A-A [99] PARTS LIST PART QUANTITY MATERIAL 1. BASE 1 MILD STEEL 2.FORK 1 CAST IRON 3. PULLEY 1 CAST IRON 4. PIN 1 MILD STEEL 5. CIRCLIP 1 SPRING STEEL 6. M10 NUT 1 MILD STEEL 7. WASHER 1 MILD STEEL 8. BUSH 1 BRONZ 9. BOLT 1 MILD STEEL TITLE PULLEY TENSIONER 54 PEARL ROAD PERSEVERANCE GENERAL PORT ELIZABETH ENGINEERING 6000 ‘FR_041 335 1600 ALL DIMENSIONS ARE| ALL UNSPECIFIED IN MILLIMETRES. RADII ARE R3. [Bl Copyright reserved Please turn over EC DBE/SEPTEMBER 2016

conten Downloaded from hlayiso.com — xo ae é ASSESSMENT CRITERIA TOP VIEW 1 | BASE 7 2 | PIN 4 3 | CIRCLIP % 4 | FoRK 5} 6 | PULLEY 43 7 | CENTRE LINES | 6 8 | CUTTING PLANE| 3. 9 | ASSEMBLY 8 SUB-TOTAL | 42 ASSESSMENT CRITERIA SECTIONAL FRONT VIEW 41 | BASE oy 2 |PIN 4 3 | FORK 19 4 | BUSH 2 5 | PULLEY 10 SUB-TOTAL | 57 TOTAL 99 NAME NAME [6 Copyright reserved Please tum over