Engineering Graphics and Design Grade 12 P2 2023 QP (Eng)

INSTRUCTIONS AND INFORMATION 1. The question paper consists of FOUR questions. 2. Answer ALL the questions. 3. ALL drawings must be drawn to scale 1 : 1, unless otherwise stated. 4. ALL 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. ISEBE LEMFUNDO LEMPUMA KOLONI 8. ALL answers must be drawn accurately and neatly. EASTERN CAPE EDUCATION DEPARTMENT 9. Any details or dimensions not given must be estimated in good proportion. OOS-KAAP ONDERWYSDEPARTEMENT 10. ALL drawings are in third angle orthographic projection, unless otherwise stated. FOR OFFICIAL USE ONLY MODERATED MARK NATIONAL SENIOR CERTIFICATE 1 2 3 4 GRADE 12 TOTAL 2 0 0 2 0 0 FINAL CONVERTED CHECKED BY MARK ENGINEERING GRAPHICS AND DESIGN P2 SEPTEMBER 2023 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

Engineering Graphics and Design / P2 NSC EC / September 2023 ST QUESTION 1: ANALYTICAL (MECHANICAL) AP LE Given: A detailed drawing of a G-clamp, a title block and table of questions. The drawings are not presented to the D indicated scale. R25 +0.1 -0.05 Instructions: Complete the table below by neatly answering the questions, which all refer to the accompanying drawings, the A title block and mechanical content. [29] C QUESTIONS ANSWERS 49 110 73 1 Which engineering firm prepared the drawing? 1 DETAIL 1 (1:2) 2 On what date was the drawing drawn? 1 VIEW 1 Ø30 Ø8 3 From what material is the tommy bar made of? 1 E 25 4 How many clamps need to be manufactured? 1 Ø21 5 What does the abbreviation 'CBORE' stand for? 1 6 What type of section is indicated at F? 1 50 7 What would VIEW 2 be called? 2 Determine the total height of the clamp, as it is 8 1 drawn. B 40 R 37 R12 9 What is the file name? 1 10 What is the feature at E? 1 What is the depth of the thread on a standard M5 11 1 bolt? 12 Determine the complete dimensions at : A: B: C: 3 13 What is the purpose of the detail views? 1 F DETAIL 2 14 How many surfaces need to be machined? 1 171 169 (1:2) M24 What is the size of the biggest work piece that can be 6 15 1 clamped? PAD With reference to the tolerance, determine the 16 2 minimum dimension at D. 25 8 With reference to the machining symbol, what is 17 1 Ø45 indicated by the label 'N2'? CBORE In the space provided below, draw, in neat freehand, 7 13 18 4 R3 the convention for a bearing. 40 27 In the space below, draw, in neat freehand, the SANS 19 4 symbol for the projection system used. VIEW 2 50 TOTAL 29 VIEW 3 APPROVED: REY 2022/03/15 ANSWER 18 ANSWER 19 PARTS LIST 15 CLAMPERY RD. CHECKED: TYLER 2023/04/16 BOUREMOUTH RELYENGINEERING 9347 PART MATERIAL QUANTITY DRAWN: SHANA 2023/01/20 ' 045 730 5801 1. FRAME CAST IRON 1 2. TITLE: G-CLAMP 2. LEAD SCREW STAINLESS 1 1. STEEL ALL DIMENSIONS ARE IN MILLIMETRES. SCALE: 1 : 4 REVISIONS DATE 3. PAD MILD STEEL 1 PROGRAMME: AUTOCAD 2023 FILE NAME: RXH-2023-182.dwg 4. TOMMY BAR MILD STEEL 1 NAME N2 DRAWING NO: 22 R 5. CAP SCREW MILD STEEL 1 QUANTITY: 400 NAME 2 Copyright reserved Please turn over

Engineering Graphics and Design / P2 NSC EC / September 2023 LE AP QUESTION 2: LOCI (CAM) ST Given: · The details of the camshaft and a roller-ended follower in the starting position. · Reference point C on the answer sheet. Specifications: · Camshaft = Ø20 mm. · The minimum distance from the cam profile to the center of the camshaft = 15 mm. · Rotation = anti-clockwise. Motion: The cam imparts the following motion to the roller-follower · It rises 20 mm with uniform motion over the first 45°. · There is a dwell period for the next 45°. · It rises a further 40 mm with uniform acceleration and retardation over the next 90°. · It returns to its original position with simple harmonic motion over the remainder of the rotation. Instructions: · Draw to scale 1 : 1, the given camshaft and the roller follower. · Show the direction of rotation on the cam profile. · Draw to a rotational scale of 30° = 8 mm and a displacement scale of 1 : 1, the displacement graph for the required motion. · Project and draw the cam profile from the displacement graph. · Label the displacement graph and the scale. C · Show ALL construction and projection. [38] 8 60 ASSESSMENT CRITERIA GIVEN + MINIMUM 1 DISTANCE + CENTRE 5 LINES Ø12 2 GRAPH CONSTRUCTION 521 Ø20 3 DISPLACEMENT GRAPH 921 4 CAM CONSTRUCTION 5 C 5 CAM + CURVE QUALITY 13 CAM AND FOLLOWER DETAIL PENALTY (-) TOTAL 38 NAME NAME 3 Copyright reserved Please turn over

Engineering Graphics and Design / P2 NSC EC / September 2023 E ST AP QUESTION 3: ISOMETRIC L Given: · Three views of a SUPPORT BRACKET in third angle orthographic projection. · Cutting plane A-A as seen in the top view. · Starting point S. Instructions: · Draw, to scale 1 : 1, a sectional isometric view of the SUPPORT BRACKET. · Make point S the lowest point of the drawing. · Show ALL necessary construction. · NO hidden detail is required. 100 [43] 20 10 130 10 A 45 20 S 20 A 20 40 R30 70 5 WEB WEB 17 19 80 20 20 5 15 45° 10 15 45 40 S S 45 10 ASSESSMENT CRITERIA 1 CONSTR' + PLACEMENT 2 2 BASE 1121 S TOWER + HEXAGON + 3 CIRCLE 15 4 SECTION A-A 1421 TOTAL 43 NAME NAME 4 Copyright reserved Please turn over

Engineering Graphics and Design / P2 NSC EC / September 2023 AM QUESTION 4: MECHANICAL ASSEMBLY KR 1 M50 x 2 M8 2 Given: Ø76 Ø16 M38 x 2 · Orthographic views of each of the parts of the safety valve. Ø8 · The exploded isometric drawing of the parts of a safety valve 1 assembly, showing the position of each part relative to the 6 18 6 3 others. 30 30 · Starting point S on the answer sheet, page 6. 6 Ø24 Instructions: PIN (2) · Answer this question on page 6. 38 15 · Draw, to scale 1 : 1 and in third angle orthographic projection, 38 the following views of the assembled parts of the safety valve. 5 18 4.1 ONLY the front half of the top view, by applying the R32 4 R28 Ø20 Ø20 convention of symmetry. Ø8 4.2 The sectional front view, on cutting plane A-A, as seen from the direction of the arrow shown on the exploded M8 SPRING SEAT (5) R10 5 isometric drawing. The cutting plane is shown on the top 18 12 14 22 view of the housing (part 9). 26 NOTE: 15° 70 1. Starting point S is indicated on the front views of the housing 58 Ø20 42 38 R38 (part 9) and the disc (part 8). R6 6 2. Show THREE faces of the M12 nut in the sectional front view. R15 5 9 3. Show ALL construction. 14 Ø28 4. NO hidden detail is required. 28 5. Make use of a partial section to indicate the screw at the CAP (1) 95 bottom of the spindle. 6. All drawings must comply with the guidelines contained in 20 33 SANS 10111. 90 ° Ø76 Ø28 Add the following features on the drawing: · The cutting plane A-A in the TOP VIEW. R5 SPRING (6) · The convention symbol to indicate symmetry in the TOP VIEW. LEVER (3) 7 [90] A A TITLE: M12 Ø20 Ø28 SAFETY VALVE M50 x 2 12 QUALITY-VALVE 15 CLAMPERY RD. BOUREMOUTH 9347 M38 x 2 ' 045 730 5801 INC. A 10 8 M12 ALL DIMENSIONS ARE IN MILLIMETRES. 5 15 40 15 ALL UNSPECIFIED RADII ARE R5. M12 NUT (4) 22 9 PARTS LIST Ø6 105 10 PART MATERIAL QUANTITY M10 1. CAP CARBON STEEL 1 12 126 Ø16 2. PIN MILD STEEL 1 S 20 3. LEVER MILD STEEL 1 Ø28 Ø10 4. M12 NUT TOOL STEEL 1 Ø28 25 20 5. SPRING SEAT MILD STEEL 1 72 5 10 7 10 A M10 6. SPRING STAINLESS STEEL 1 S FR ON 7. SPINDLE STAINLESS STEEL 1 TV HOUSING (9) IEW DISC (8) SPINDLE (7) 8. DISC BRONZE 1 9. HOUSING CAST IRON 1 5 Copyright reserved Please turn over

Engineering Graphics and Design / P2 NSC EC / September 2023 LE PENALTIES AP ST 1 WRONG SCALE 2 PARTS NOT ASSEMBLED 3 WRONG HATCHING TOTAL PENALTIES (-) ASSESSMENT CRITERIA TOP VIEW 1 LEVER 1 2 CAP 221 CONVEN, SYMMETRY LINES + 3 CUTTING PLANE 4 SUB-TOTAL 721 SECTIONAL FRONT VIEW 1 CAP 1121 2 PIN 1 3 LEVER 521 4 SPRING SEAT 7 5 HOUSING 1921 6 M12 NUT 621 7 SPRING 121 8 SPINDLE 16 9 DISC 3 SUB-TOTAL 7121 GENERAL 1 CENTRE LINES 3 2 ASSEMBLY 8 SUB-TOTAL 11 S TOTAL 90 PENALTIES (-) GRAND TOTAL 90 NAME NAME 6 Copyright reserved