Engineering Graphics and Design Grade 12 P2 2015 QP

Downloaded from hlayiso.com ISEBE LEMFUNDO LEMPUMA KOLONI EASTERN CAPE EDUCATION DEPARTMENT OOS-KAAP ONDERWYSDEPARTEMENT NATIONAL SENIOR CERTIFICATE GRADE 12 ENGINEERING GRAPHICS AND DESIGN P2 SEPTEMBER 2015 PREPARATORY EXAMINATION MARKS: 200 TIME: 3 hours This question paper consists of 6 pages. Copyright reserved INSTRUCTIONS AND INFORMATION The paper consists of FOUR questions Answer ALL the questions. All drawings must be drawn to scale 1 : 1, unless otherwise stated. The questions must be answered on the answer sheets provided. All the answers sheets must be re-stapled in numerical sequence and handed in irrespective of whether the question was attempted or not. Careful time management is essential in order to complete all the questions. Print your name in the block provided on every ANSWER SHEET. All answers must be drawn accurately and neatly. Any details or dimensions not given must be estimated in good proportion. geen LOND FOR OFFICIAL USE ONLY erro 1 | 2 | 3 | 4 | TOTAL | 2/0/0| FINAL CONVERTED CHECKED BY MARK 100 COMPLETE THE FOLLOWING: NAME NAME EXAMINATION CENTRE EXAMINATION CENTRE Please turn over 1

Downloaded from hlayiso.com Engineering Graphics and Design/P2 Nsc September 2015 152 24 15, 926 / La] QUESTION 1: ANALYTICAL (MECHANICAL) Giver Detailed drawings showing parts of a bearing bracket, a title block and a table of questions. The drawings have not been prepared according to the indicated scale. Instructions: Complete the table below by neatly answering the questions, which all refer to the accompanying detailed drawings and the title block. [27] 48 _ 1 | On what date was the drawing approved? 1 3) 2. | What is the name of the company that designed the bearing bracket? 1 (3) - ~ (al) 3. | Which drawing method was used to create these drawings? 1 2 4 | How many sets of drawings are there? 1 so" 5 | Whatis the tolerance allowed on the dimensions? 1 al 6 | What indicated scale has been used for the drawing? 1 7 7 [How many parts make up the assembly? 1 |___so___| 100 8 | What is feature 1 called? 1 98 9 | Whatis feature 2 called? 1 BODY 10 | What is feature 3 called? 1 mie (ec 11 | What type of section is shown on the PULLEY? 1 5 [20 7 Ee gor _| 12 | Determine the dimensions at: A) B) Cc) 4 13 | Whatis part 4 called? 1 14 | How many external screw threads are there in the assembly? 1 M18 NUT 15 | Complete the cutting plane on the front view of the BASE and label it A-A. 3 46 | In the box below (ANSWER 16), draw, in neat freehand, the symbol for the 4 HI projection system used. Me 17 |IMthe box below (ANSWER 17), draw, in neat freehand, the front view and 3 » side view of a Woodruff key. TOTAL | 27 [| 40 PULLEY = |-28 _-| PART4 2 ANSWER 17 15/07/14 ANDREW REMOVE KEY WAY 1 DRAWING SET: 2 OF 3 DATE ‘CHANGED BY REVISION DESCRIPTION No, DRAWING PROGRAM: AutoCAD 2014 DRAWN: PETER 01/07/14 ANSWER 16, B EARI N G B RACKET DRAWING Ne. BEARING /98/2015 CHECKED: JOHN 08/07/14 FILE NAME: bearing4.dwg APPROVED: ILSE. 30/07/14 UNLESS OTHERWISE SPECIFIED ALL_ | MATERIAL: CAST IRON - - CENTAUR — | 72MOouestReeT | ivensions are in wituiMeTReS PORT ELIZABETH WITH A TOLERANCE OF: 0,25 HEAT TREATMENT: NONE. ENGINEERS 6001 ; NAME: (SA) (Pty) Lid www.centaur.co.za UNLESS OTHERWISE SPECIFIED ALL | SCALE: 1:2 1 041 959 5432 SURFAGES TEXTURE FINISHES: o/” [Quawrity.60 Te 3 Copyright reserved Please tum over

Downloaded from hlayiso.com Engineering Graphics and Design/P2 Nsc September 2015 Los Oe QUESTION 2: LOCI (CAMS) Given: * The incomplete displacement diagram. © 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 clockwise Over the first 60°, the follower rises 36 mm at an uniform velocity There is a dwell period for the next 30°. Over the next 90°, the follower rises a further 34 mm at simple harmonic velocity. Over the final 180°, the follower returns to its original position at uniform acceleration & retardation. Minimum distance from cam profile to cam shaft centre is 10 mm. . oe Instruction 2.1. Draw a displacement graph with a rotational scale of 30° equal to 10 mm and a follower displacement scale of 1:1 for the given motion. Label the graph. 2.2. Project, to scale 1:1, and draw the cam profile that the displacement diagram would generate using the vertical centre line as reference. The arrow indicating the direction of rotation must be shown Show ALL necessary construction. [36] UNIFROM. UNIFORM, ‘SIMPLE ACCELERATION VELOCITY | HARMONIC & RETARDATION ASSESSMENT CRITERIA 1 ] GRAPH DIVISIONS + 4 CONSTR GRAPH PLOTTING POINTS & 2 | CURVE 13 3 | MIN. DIST, CLINES + 3 ARROW 4 | CONSTRUCTION 3 5 | PLOTTING 73 6 | CURVE 44 7 | LABEL 1 TOTAL] 36 NAME NAME 3 Copyright reserved Please tum over

Downloaded from hlayiso.com Engineering Graphics and Design/P2 Nsc September 2015 ré 106 QUESTION Given: © The front view, top view and left view of a sliding guide © The position of point L on the drawing sheet. : ISOMETRIC DRAWING Instructions: Using scale 1: 1, convert the orthographic views of the sliding guide into a sectional isometric drawing on cutting plane A-A. * Make L the lowest point of the drawing. * Show ALL necessary constructions. * NO hidden detail is required [44] L RAO T T l ] 1) 1 YT] 8 uo Uo a al 8 ta gq [44 q 100 Ky Us 25 ASSESSMENT CRITERIA 1 | AUX’ VIEWS + PLACING 3 2 | ISO’ LINES 24 3 | NON ISO' LINES: 8 4 | CIRCLE + CONSTR 6 H | SECTIONING 3 TOTAL 44 NAME NAME [4 Copyright reserved Please tum over

Downloaded from hlayiso.com Engineering Graphics and Design/P2 NSC September 2015 QUESTION 4; MECHANICAL ASSEMBLY 123 1 45: 220 12 —M14 Given: © The exploded isometric drawing of the parts of a hanging pin assembly, showing the position of each part relative to all the others. * Orthographic views of each of the parts of the hanging pin assembly. WU) 22 \@30 SHAFT WASHER NUT Instructions: * Answer this question on page 6. * Draw, to scale 1 : 1, the sectional front view, of the hanging pin assembly, on cutting plane A-A, as seen from the direction of the arrow shown on the exploded isometric drawing. The cutting plane, which passes vertically through the centre of the assembly, is shown on the top view of the base (part 1). * ALL drawings must comply with the guidelines contained in the SABS 0111. , 30 Fe 7 H i : i | NOTE: « Show THREE faces on the right hand side nut, and TWO. - faces on the left hand side nut, in the front view and ALL g necessary construction NO hidden detail is required. [93] ql : 27 3 { PARTS LIST PART. QUANTITY MATERIAL 41. BASE 1 CAST IRON 2. BUSH 1 BRASS. 3. BEARING 1 MILD STEEL A HANGING PN i CAST RON aca 7 viLD STEEL 6. SCREW 1 MILD STEEL 7. SHAFT 1 WILD STEEL a. WASHER 2 MILD STEEL uns oN z MILD ETEEL { Tz OLD CAPE ROAD ys IBAYHI STEEL “Gecenousues | ons S BEARING TLE Be on HANGING PIN ASSEMBLY ALL UNSPECIFIED SCREW EXPLODED ISOMETRIC DRAWING INMULIMETRES. | RADITARE Ra © & Al Copyright reserved Please tum over

Downloaded from hlayiso.com Engineering Graphics and Design/P2 Nsc September 2015 ASSESSMENT CRITERIA SECTIONAL FRONT VIEW BASE 19 BUSH 7 BEARING HANGING PIN CAP SCREW 12 ‘SHAFT 14 WASHERS, NUTS " 10 CENTRE LINES ASSEMBLY TOTAL 93 NAME NAME Copyright reserved