Engineering Graphics and Design Grade 12 P2 2024 QP (Eng)

Downloaded from hlayiso.com INSTRUCTIONS AND INFORMATION FOR OFFICIAL USE ONLY MODERATED NATIONAL SENIOR CERTIFICATE MARK 1 2 3 4 GRADE 12 TOTAL 2 0 0 2 0 0 FINAL CONVERTED CHECKED BY MARK *GRDSE2* ENGINEERING GRAPHICS AND DESIGN P2 SEPTEMBER 2024 100 COMPLETE THE FOLLOWING: PREPARATORY EXAMINATION NAME NAME MARKS: 200 EXAMINATION CENTRE TIME: 3 hours This question paper consists of 6 pages. SCHOOL Copyright reserved Please turn over 1 Hosted by www.ecexams.co.za.

Engineering Graphics and Design / P2 LE Downloaded from hlayiso.com NSC QUESTION 1: ANALYTICAL (MECHANICAL) EC / September 2024 P TA D S Given: 245 +0.25 A detailed drawing of a bracket bearing, a title block and table of questions. The drawings are not presented to 106 -0.03 190 the indicated scale. Instructions: 20 Complete the table below by neatly answering the questions, which all refer to the accompanying drawings, the title block and mechanical content. [30] Ø19 B Ø39 x 5 S'FACE QUESTIONS ANSWERS Ø39 A 1 Who approved the drawing? 1 16 2 How many revisions have been done on the drawing? 1 Which drawing program was used to create these 3 1 drawings? How many parts are used to manufacture the 4 1 bracket? 258 5 What material is the bracket made of? 1 C 6 What does the abbreviation 'S'FACE' stand for? 1 E M11 7 Name the convention at E. 1 24 8 What would VIEW 2 be called? 2 9 What is the feature at F? 1 A F 10 What is the purpose of the gaps indicated by G? 1 74 R51 11 How many threaded holes are there in the assembly? 1 G 29 12 Determine the complete dimensions at : A: B: C: 3 3 13 What SI unit is the dimensions presented in? 1 5 14 How many surfaces need to be machined? 1 R68 With reference to the tolerance, determine the 15 4 maximum and minimum dimension at D. Ø41 In the space provided below, draw, in neat freehand, 16 5 the convention for a spur gear. A 94 In the space below, draw, in neat freehand, the SANS 17 4 symbol for the projection system used. VIEW 1 VIEW 2 TOTAL 30 APPROVED: SAM 2024/01/21 2. CHECKED: KYLE 2023/11/19 1. INSERT OIL HOLE 2024/01/11 DRAWN: SISIPHO 2023/01/02 REVISIONS DATE ANSWER 16 ANSWER 17 6 OAK DRIVE WILLOW PARK PARTS LIST JWA ENGINEERING 3132 046 821 4911 PART MATERIAL QUANTITY TITLE: 1. BRACKET CAST IRON 1 BRACKET BEARING 2. CAP STAINLESS STEEL 1 ALL DIMENSIONS ARE IN MILLIMETRES SCALE: 1 : 4 3. LOWER BEARING MILD STEEL 1 PROGRAMME: AUTOCAD 2023 4. UPPER BEARING MILD STEEL 1 FILE NAME: RVH-2024-189.dwg 5. M20 STUD MILD STEEL 4 NAME DRAWING NO: 5 6. M20 NUT MILD STEEL 4 QUANTITY: 1 000 NAME 2 Copyright reserved Please turn over Hosted by www.ecexams.co.za.

Engineering Graphics and Design / P2 LE Downloaded from hlayiso.com NSC EC / September 2024 AP QUESTION 2.1: LOCI (MECHANISM) ST A Given: P x A mechanism consisting of a crank OP that is pin joined to a slotted link AC. The slotted link slides over a fixed pin C, that is located on the circumference of a wheel, with centre Q. Q Motion: O x Crank OP rotates in an anti-clockwise direction while the wheel, with centre Q , rotates at the same speed in a clockwise direction. The C slotted link AC, slides over pin C, as they both rotate. 25 Instructions: x Draw to scale 1 : 1, the given schematic diagram, using point O as given reference point. O A x Trace the loci generated by point A, located on the link AC, as OP 95 completes one revolution. P x Show all necessary constructions. [18] Ø76 Ø30 12 ASSESSMENT CRITERIA Q 1 GIVEN 6 O CONSTRUCTION OF C 2 DIAGRAM 6 3 CONSTRUCTION OF LOCI 6 101 PENALTY (-) SUB-TOTAL 18 QUESTION 2.2: LOCI (CAM) Given: x The starting position D of the displacement diagram for a cam. Specifications: The cam imparts the following motion to the follower: x It dwells for a period of 60°. x It rises 50 mm with simple harmonic motion for a period of 90°. x It rises 40 mm with uniform motion for a period of 30°. x It then dwells for a period of 45°. x It returns to the original position with uniform acceleration and retardation for the last 135°. Instructions: x Draw, to a displacement scale of 1 : 1 and horizontal ASSESSMENT CRITERIA scale of 360° = 132 mm, the complete displacement 1 GRAPH CONSTRUCTION 8 graph for the required motion. x Label the graph and indicate the scale. x Show ALL necessary construction. [20] 2 DISPLACEMENT GRAPH 10 3 LABEL AND SCALE 2 PENALTY (-) SUB-TOTAL 20 TOTAL 38 D NAME NAME 3 Copyright reserved Please turn over Hosted by www.ecexams.co.za.

Engineering Graphics and Design / P2 Downloaded from hlayiso.com NSC 32 EC / September 2024 AP LE QUESTION 3: ISOMETRIC ST Given: x Three views of a SUPPORT BRACKET in third 28 angle orthographic projection. x Cutting plane A-A as seen in the top view. 18 x Starting point S. Instructions: x Draw, to scale 1 : 1, a sectional isometric view of the SUPPORT BRACKET. x Make point S the lowest point of the drawing. 82 x Show ALL necessary construction. x NO hidden detail is required. [40] A S A 64 64 18 R20 36 25 16 18 60 ° 135 25 60 ° 62 28 18 S S 82 ASSESSMENT CRITERIA 1 CONSTR' + PLACEMENT 2½ 2 ISO'- + NON ISO' LINES 19 3 HALF HEXAGON 4 4 HALF CIRCLE + CL'S 4 5 SQUARE 1 6 SECTION A-A 9½ S TOTAL 40 NAME NAME 4 Copyright reserved Please turn over Hosted by www.ecexams.co.za.

Engineering Graphics and Design / P2 LE Downloaded from hlayiso.com16 83 16 NSC 16 83 16 QUESTION 4: MECHANICAL ASSEMBLY EC / September 2024 AP 12 ST 8 40 4 A Given: 17° 11 x Orthographic views of each of the parts of the steam chest. 22 23 11 R7 Ø18 32 x The exploded isometric drawing of the parts of a steam chest 10 Ø10 10 assembly, showing the position of each part relative to the Ø16 Ø14 47 54 22 64 46 others. 99 57 10 Ø6 10 Ø10 x Point S in the front view of the housing. x Starting point S on the answer sheet, page 6. 48 R6 14 26 Instructions: 60° x Answer this question on page 6. 32 x Draw, to scale 1 : 1 and in third angle orthographic projection, 45 78 Ø41 35 79 the following views of the assembled parts of the safety valve. x The sectional front view, on cutting plane A-A, as seen 47 115 Ø115 Ø64 Ø22 from the direction of the arrow shown on the exploded Ø9 isometric drawing. The cutting plane is shown on the left view 11 115 S of the housing (part 2). NOTE: 34 1. Starting point S is indicated on the front view of the housing (part 3). 115 2. Show THREE faces of the M18 nut in the sectional front view. A 3. Show ALL construction. COVER (1) HOUSING (2) 4. NO hidden detail is required. 5. All drawings must comply with the guidelines contained in Ø97 SSD 14 SANS 10111. Add the following features on the drawing: Ø115 1 x The construction method for the M8 nut. [92] Ø10 Ø16 17 Ø9 Ø10 Ø38 29 25 Ø25 Ø64 TITLE: 40 8 STEAM CHEST 55 22 8 Ø16 FLANGE GLAND (3) 5 7 PORTFOMATION 1 SUPIRO RD. BUPIROBAN 9347 INC. 045 730 5801 11 2 ALL DIMENSIONS ARE IN MILLIMETRES FLANGE (4) ALL UNSPECIFIED RADII ARE R3 Ø10 16 9 17 5 8 Ø6 LIST OF PARTS Ø16 7 M8 22 15 PART MATERIAL QUANTITY 55 54 6 25 3 6 13 M8 1. COVER CAST IRON 1 Ø10 38 21 34 13 2. HOUSING CAST IRON 1 AXLE (5) GLAND (6) M8 NUT (8) 3. FLANGE GLAND MILD STEEL 1 4. FLANGE MILD STEEL 1 57 5. AXLE STAINLESS STEEL 1 6. GLAND BRONZE 1 60 7. VALVE CAST IRON 1 VALVE (7) 3 4 8. M8 NUT STAINLESS STEEL 1 5 Copyright reserved Please turn over Hosted by www.ecexams.co.za.

Engineering Graphics and Design / P2 LE Downloaded from hlayiso.com NSC PENALTIES EC / September 2024 ASSESSMENT CRITERIA AP ST 1 WRONG SCALE SECTIONAL FRONT VIEW 2 PARTS NOT ASSEMBLED 1 COVER 6 3 WRONG HATCHING 2 HOUSING 32 TOTAL PENALTIES (-) 3 VALVE 9½ 4 GLAND 4½ 5 AXLE 6½ 6 M8 NUT 6½ 7 FLANGE 12 8 FLANGE GLAND 5 SUB-TOTAL 81 GENERAL 1 CENTRE LINES 3 2 ASSEMBLY 8 SUB-TOTAL 11 PENALTIES (-) TOTAL 92 S NAME NAME 6 Copyright reserved Hosted by www.ecexams.co.za.