EGD P2 Sept 2018 Eng_hlayiso.com_.pdf

Downloaded from hlayiso.com *GRDSE2*

Engineering Graphics and Design/P2 Downloaded from hlayiso.com QUESTION 1: ANALYTICAL (MECHANICAL) Ee aa 242 20 P13 BASE [1] M118 x2 CAP [2] IMPELLER [3] NUT [5] ‘ALL UNDIMENSIONED RADII ARE 3. ALL DIMENSIONS ARE IN MILLIMETRES. | SCALE: 1-2 PROGRAMME: AUTOCAD 2018 MATERIAL: CAST IRON FILE NAME: pump3.dwg QUANTITY: 300 UNITS DRAWING No. P3A-08 TREATMENT: NONE MILLING FINISH: POLISHED oof 1 GRANGE INLET 2017/10/20 160 HUNTER STREET | _ REVISIONS DATE DW oor ABETH | ORAWN: MaT 2017/09/10 ENGINEERING WORKS 0414872188 | CHECKED: LP 2017/09/13 TITLE WATER PUMP ‘APPROVED: DW 2017/10/28 EC/SEPTEMBER 2018 Given: A detailed drawing of a water pump, 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. [26] QUESTIONS ANSWERS On what date was the drawing approved? What is the name of the engineering firm? Which indicated scale has been used? How many water pumps must be produced? What had to be changed before the drawing was approved? What is the file name? What roughness value is required on the machined surfaces? How many surfaces, on the BASE, need to be machined? clolrjfolalafo|nr Name the type of section the cutting plane L-L produced. 3 Name the type of section cutting plane M-M would produce. Name the type of feature shown at 1 s What does the encircled feature at 2 indicate. ro What does the feature (line) at 3 indicate? B Name the feature at 4. 15 What does the "x 2" indicate in the M18 x 2 dimension on the CAP? 16 What mistake was made with the sectioning of the CAP? 17 Determine the complete dimensions: A 18 Determine the complete radius at C. 19 In the box below, draw, in neat freehand, the SANS symbol for a bearing. TOTAL | 26 ANSWER 19 NAME NAME [2 Copyright reserved Please tum over

Engineering Graphics and Design/P2 Downloaded from hlayiso.com — QUESTION 2: LOCI (CAMS) Given: * The shaft and follower detail of an industrial cam with follower shown at its lowest position. * The vertical centre line of the cam shaft as reference on the drawing sheet. The specifications for the movement are as follows: * The cam shaft rotates anti-clockwise at constant velocity for the first 270° Over the first 60° the follower rises 27 mm There is a dwell period for the next 45°. Over the next 45° the follower rises a further 28 mm There is a dwell period for the next 30°. Over the next 60° the follower drops 15 mm. se There is a dwell period for the next 30° * Over the final 90° the follower returns to its original position with simple harmonic motion Instructions: 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 1 : 1 for the given motions. Label the graph. 2.3. Project and draw the cam profile that would generate the given motion. + Show ALL construction [39] REFERENCE LINE CAM SHAFT AND FOLLOWER DETAIL ASSESSMENT CRITERIA 1 | GRAPH 12 7 | FOLLOWER +sHAFT* |g ARROW + GL 3 | constRUCTION 4 4 | CAM POINTS 8 5 | CURVE + QUALITY 7 TOTAL} 39 NAME NAME [3 Copyright reserved Please turn over

Engineering Graphics and Design/P2 Downloaded from hlayiso.com — QUESTION 3: ISOMETRIC DRAWING Given: The front view, top view and right view of a jig bracket and cutting plane A-A. The position of point S on the drawing sheet. Instructions: Using scale 1: 1, convert the orthographic views of the jig bracket into a sectional isometric drawing on cutting plane A-A. * Make corner S the lowest point of the drawing. * Show ALL construction. * NO hidden detail is required [37] WEB 67 86 ASSESSMENT CRITERIA 1 | AUX’ VIEW + PLACING 2 3 | HEXAGON 2 | ISOMETRIC LINES 133 4 5 Ss 4 | CIRCLE +CL 5 | SECTIONED SURFACE | 12) TOTAL 37 NAME NAME, [4 Copyright reserved Please turn over

Engineering Graphics and Design/P2 Downloaded from hlayis 62 5 THREADED COLLAR [6] 2 | 30 21 50, 20 14 \ 7 Ft —f t Pa —+ ————-] a8) | I I) ee i fat — __ 24 | 46 \ HOLDER [2] 72 58 I | SHAFT [3] EXPLODED ISOMETRIC DRAWING M14 ry M14 NUT [7] O28 o14 O ww ed 9 Nw Ye m ECISEPTEMBER 2018 EYE BOLT [9] QUESTION 4: MECHANICAL ASSEMBLY Given: © The exploded isometric drawing of the parts of a overhead pulley assembly, showing the position of each part relative to all the others. * Orthographic views of each of the parts of the overhead 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 overhead pulley assembly: 4.1 The half sectional front view of the over head pulley assembly, on cutting plane A-A as seen from the direction of the arrow shown on the exploded isometric drawing. The left side of the front view must be cut. The cutting plane, that runs vertically through the centre of the assembly, is shown on the right view of the bracket (part 1) and cuts through point S 4.2 A right view without any hidden detail. * ALL drawings must comply with the guidelines contained in the SANS 10111. NOTE: * As indicated, align point S on the washer with point S on the holder and point S on the eye bolt. © Planning of the layout of the views is important. * Show, in the sectional front view, THREE faces of the M14 nut and ALL constructions. * NO hidden detail is required Add the following features to the drawing: © The cutting plane A-A. [98] PARTS LIST PARTS QUANTITY, MATERIAL 41. BRACKETS 2 MILD STEEL 2. HOLDER 1 MILD STEEL 3. SHAFTS. 2 MILD STEEL 4. SPACERS 4 MILD STEEL 5. BEARINGS 4 MILD STEEL. 6. THREADED COLLARS 4 MILD STEEL 7, M14 NUT 1 MILD STEEL 8. WASHER 1 MILD STEEL 9. EYE BOLT 1 CAST IRON TITLE OVERHEAD PULLEY 160 HUNTER STREET DW PORT ELIZABETH ci IG WORKS 6001 ENGINEERING WORK’ FR oat 487 2188 ALL DIMENSIONS ARE| ALL UNSPECIFIED IN MILLIMETRES. RADII ARE RA. [Bl Copyright reserved Please tum over

conten Downloaded from hlayiso.com ra ASSESSMENT CRITERIA SECTIONAL FRONT VIEW 1 | BRACKETS 10 2 | HOLDER a 3 | SHAFT ri 4 | SPACERS 4 5 | BEARINGS 6 7 | Nut 4 8 | WASHER 4 9 | EVE BOLT 1" SUB-TOTAL 62 ASSESSMENT CRITERIA RIGHT VIEW 7 | BRACKET 4 2 | HOLDER 3 3 [Nut 3 4 | WASHER 4 5 [eve soLt 3 6 | CUTTING PLANE 3 7 | assemeLy 12 SUB-TOTAL 36 TOTAL 98 NAME NAME [6 Copyright reserved