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NATIONAL SENIOR CERTIFICATE: ENGINEERING GRAPHICS AND DESIGN: PAPER 2 PAGE 1 OF7 assessment matters - NATIONAL SENIOR CERTIFICATE EXAMINATION oO ‘4 oO 2017 2 =_ [ FOR OFFICIAL USE ONLY ENGINEERING GRAPHICS AND DESIGN [question I SECTION l MARK [MoveRaTeD|[ Maximum CODE MECHANICAL PAPER 2 1 ANALYTICAL 20 Locus : LOCUS MARKS: 200 2.2 vesinsw 15 TIME: 3 HOURS 2 | somernc 40 DRAWING PLEASE READ THE FOLLOWING INSTRUCTIONS CAREFULLY 4 MECHANICAL 1 00 ASSEMBLY 1. This question paper consists of 7 pages including the cover page and 4 questions. L 2. All the questions must be answered. SYMBO TOTAL 2 00 3. Unless specified otherwise, all questions are in Third Angle Orthographic Projection. 4. Unless specified otherwise, all questions are to be completed to a scale of 1:1. TOTAL 1 00 5. All answer sheets must be stapled in numerical order and handed in, even unattempted/blank questions. 6. All construction work must be shown, even if a stencil was used. FINAL CONVERTED MARK CHECKED BY 7. Print your examination number neatly on each page. 8. Use only the answer sheets provided. 9. Your drawings should be well presented and reflect neatness and accuracy, Marks will be deducted for untidy and inaccurate work. pce 10. Any dimensions or detail not given may be assumed in good proportion. i @) @) 11. Stencils and calculators may be used. 12. All drawings must adhere to the SANS 10111-1. 13. In order to save time, detailed assembly parts must be drawn to convention. EXAMINATION NUMBER [EB COPYRIGHT © 2017 PLEASE TURN OVER

NATIONAL SENIOR CERTIFICATE: ENGINEERING GRAPHICS AND DESIGN: PAPER 2 : PAGE 2 OF7 1.12 Calculate the meter 11 in Figure F. pl) Figure A Figure B MECHANICAT ANALYTICAL Answer the following questions neatly and legibly in the space provided: | Q y 1.1 Name the type of hole shown at 1 in Figure A. (1) t 1.2 Name the type of hole shown at 2 in Figure A. a) ZY yy t i -—+ {-——=-=} @ 1.3 What type of sectioning is shown in Figure B? ay t 7 eee 4.4 Calculate the radius 3 in Figure C. (ty — 1.5 Whatis feature 4 in Figure C called? (1) 4.6 Which screw in Figure D would fit completely into £ hole 5 and produce a near flush top surface? a (eo) . 1.7 Which screw in Figure D would fit completely into (o) Figure C Figure D hole 6 and produce a near flush top surface? (1) - 1.8 Whatis feature 7 in Figure E called? a) oO} 1.9 Whatis feature 8 in Figure E called? a) Q 1.10 Calculate the dimension 9 in Figure E. (1) & wT O w wT ow 4.41. Calculate the diameter 10 of the ball in Figure F. oy A 8 c D E 1.13 What is the thickness of the thread in Figure G? (1) g 8 1.14 Is the thread in Figure G external or internal? (1) A a | 1.45 Calculate the diameter 12 of the circle in Figure H. (1) 2 HOLES 12 a 1.16 Caloulate the diameter 13 of the circle in Figure H. (ty 4.17 The machining symbol in Figure | shows the following information: (2) Select and circle the correct option. ‘ Option | Machine allowance | Roughness value | Direciion offay ] Finvsh Figure F x o2 08 Cireuar Prating 5 05 02 = c 02 os Parallel Praling i D = a2 Perpendicular | Plating aj err 1.18 The welding symbol in Figure J shows the following information: (2) Select and circle the correct option. Figu reE —h. el ath ‘Option Weid yoo Site weld Weld all around | Process 7 A Bead No Yes Fiame 8.8, 1410 FO sa: = it Yer We ie Q [| —S----}E € Bevel No No Flame ON PCD 24 D it Yes Yes Are : Figure | Figure J ee tai H PLATING Co Figure G 08 7 0. = M6x1 2 20 MARKS EXAMINATION NUMBER ANSWER SHEET 1 | | | IEB COPYRIGHT ©2017 PLEASE TURN OVER

NATIONAL SENIOR CERTIFICATE: ENGINEERING GRAPHICS AND DESIGN: PAPER 2 PAGE 3 OF 7 Downloaded from hlayiso.com 30° 90° or 60° 150° 120° 210° 180° 240° 270° 300° ANSWER SHEET 2.1 330° 360° Given is the incomplete graph of displacement of a wedge-ended follower as well as the centre of the camshaft as shown by the given centre lines. The graph of displacement has the following motion: ¥ 0°—120° the follower rises 40 mm with simple harmonic motion. (Given) ¥ 120°—150° the follower is at rest, (Uniform motion) ¥ 150°—180°* the follower rises 20 mm. (Uniform motion) ¥ 180°—360° the follower returns to its original position with uniform acceleration and retardation. The cam profile has the following specifications: > The direction of turn is anti-clockwise, > The camshaft has a radius of 9 mm. 2.1.1 Draw the complete graph of displacement. 2.1.2 Draw the cam profile. 2.1.3 Draw the camshaft with hatching. 2.1.4 Draw the wedge-ended follower (to your own appropriate size and measurements). 2.1.5 Draw the direction of rotation. 2.1.6 Print, in capitals, the required /abef at A and the > \SSESSMENT CRITERIA Graph 12/2 Setup/Plot Points 1 Locus Shafi and hatch Follower Direction Label/Scale SSs8sssss Naaandoa EXAMINATION NUMBER | | | | J IEB COPYRIGHT © 2077 PLEASE TURN OVER

NATIONAL SENIOR CERTIFICATE: ENGINEERING GRAPHICS AND DESIGN: PAPER 2 PAGE 4 OF7 Downloaded from hlayiso.com ANSWER SHEET 2.2 (QUESTION 2.2] LOCUS MECHANISM ‘The given figure shows @ wheel, rotating around the centre O, with a rod AD attached to it at point A. Rod BC is pin-jointed at point B and free to move about its anchor point C. Rods AD and DP are fixed at 90°. Rod BC rocks back and forth as the wheel rotates, Construct and draw the locus of point P if the direction of rotation is clockwise. Show all constructions and indicate the direction correctly, ASSESSMENTCRITERIA] [SET | @ Setup 2 Plot Points 141 @ Direction 1 @__Locus 1 15 MARKS EXAMINATION NUMBER 1 i tt] TT 4) IEB COPYRIGHT © 2017 PLEASE TURN OVER

Downloaded from hlayiso.com NATIONAL SENIOR CERTIFICATE: ENGINEERING GRAPHICS AND DESIGN: PAPER 2 PAGE 5 OF 7 a CONSTRUCTION AREA QUESTION 3 ISOMETRIC: | "oRAWNS | The figure below shows the top view, front view and left view of a heavy duty CASTING. The CASTING has been cut by a cutting plane A-A. 3.1 Draw a neat Sectioned Isometric on the cutting plane A-A. 3.2 Show the construction for the hexagon. 3,3 Draw the centre lines for the circle. 3.4 Make point P the lowest part of your drawing. 3.5 Start your drawing on the given crosshairs. ASSESSMENT CRITERIA Construction ES a 22 a 4 @ 3 @ Hatching 5 @ ~Non-hatching 2 @ Positioning 2 40 MARKS EXAMINATION NUMBER ANSWER SHEET 3 IEB COPYRIGHT © 2017 PLEASE TURN OVER

NATIONAL SENIOR CERTIFICATE: ENGINEERING GRAPHICS AND DESIGN: PAPER 2 PAGE 6 OF 7 PART A PART G uf +! M6x1 - r PART B 160 PART H r+ 20 4100 30 F 2 SSS SS a 2 HOLES @12 100 | 30 fe 414 R10 PART C OL, PART D Downloaded from hlayiso.com M6x1 R13 AS S84 10 BALLS @7 ON PCD 21 QUESTION 4 MECHANICAL ASSEMBLY Figure 2 shows a series of pictures of a sliding GATE WHEEL assembly, as well as an exploded view of how the components of a si simplified system are assembled. A list of components is also shown. lar, Figure 1 shows the different components (not drawn to scale) that need to be assembled. Complete the following on answer sheet 4 toa SCALE of 1:1 44 A ull sectional Front View of the assembled components on the cutting plane A-A. 4.2 A Right View of the assembled components on the given centre lines. 4.3 Please note the following: Show 3 faces for the hexagonal nut ‘on the front view. 4.4 Show hidden detail on the right view of only the Gate Frame (Part A) without the holes for the screws, and on only ONE of the two Wheels (Part G), 4.5 Draw the cutting plane and the centre lines. 4.6 Draw 3 functional dimensions. 4,7 Draw the projection symbol in the space provided, 4.8 Print the title and scale in the space provided. 4.9 Label the sectioned view. FRONT VIEW PARTA L COMPONENT LIST | NO. PART | QUANTITY || MATERIAL | A |GATEFRAME| 7 MILD STEEL] R2 c D [M12 BOLT 2 [MILD STEEL] ol Lt PARTE IL 2 2 WHEEL | 2 [MILD STEEL [8 [eRADLE | 1 | | | H [BEARING [| 4 [steer | = a a PARTE PARTE 18 PARTH sal PART H PART G EXAMINATION NUMBER fear] |] | i J i TTT) IEB COPYRIGHT © 2017 PLEASE TURN OVER

NATIONAL SENIOR CERTIFICATE: ENGINEERING GRAPHICS AND DESIGN: PAPER 2 PAGE 7 OF 7 QUESTION 4 MECHANICAL ASSEMBLY, ASSESSMENT CRITERIA| FRONT VIEW |GATE FRAME, ICRADLE jp 16 SCREW M12 BOLT ASHER [M12 NUT WHEEL ayo) BEARINGS TOTAL] 44 ZIO|AM/G\o|ay> 4 6 4 120 6 2 5 9 8 RIGHT VIEW AGATE FRAME [5 BICRADLE iol 5 E |wasHeR 2 | DiFMi2 NUTIBOLT | 8 2 6 G/WHEEL HIDDEN DETAIL ' TOTAL| 28 = - = ADDITION. CORRECTASS. 5) ; HATCHING 4, NON-HATCHING A 4 7 3 CENTRE LINES 3 3 2 Z 2. 2 DIMENSIONS ra) ! CUTTING PLANE SYMBOL ia) TITLE/SCALE LABEL TOTAL | 28 [TOTAL | 100 TITLE SCALE SYMBOL EXAMINATION NUMBER [answersneera) froomarg {|_| | LLL] IEB COPYRIGHT © 2017