Engineering Graphics and Design Grade 12 P2 2014 QP

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Les QUESTION 4: ANALYTICAL (MECHANICAL) Ce ° Given: a Detailed drawings showing parts of a safety valve, a title block and a table of pV 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 [30] 1 | On what date was the drawing first checked? 1 2 | What is the title of the drawing? 1 3. | Which drawing method was used to create these drawings? 1 3 HOLES R4 x 5 mm DEEP. 4 |How many safety valves must be manufactured? 1 pt 5 | How many sets of drawings are there? 1 zr 6 | What is the tolerance allowed on the dimensions? 1 7 | What indicated scale has been used for the drawing? 1 g 8 | How many parts make up the assembly? 1 9 | What is feature 1 called? 1 _--2 mm THICK RUBBER DIAPHRAGM 10 | What is feature 2 called? 1 11 | What is feature 3 called? 1 G 12 | What is the size of the hole marked D? 1 Spo pst 71-5 8 13 | From what material is the diaphragm made? 1 ~ 14 | What type of section is shown? 1 400 3g 15 | Determine the dimensions at: A) B) c) 4 nail Ez 16 | What do the letters P.C.D. stand for? 1 alr 17 | How many external screw threads are there in the assembly? 1 g 18 | Complete the cutting plane on the top view and label it A-A. 3 (3) 49 | In the box below (ANSWER 19), draw, in neat freehand, the symbol for the 4 projection system used 30 100 120 30 20 In the box below (ANSWER 20), draw, in neat freehand, the SABS 0111 3 schematic convention for a spring TOTAL | 30 ANSWER 20 1413 PETER DIAMETER OF INLETS 1 | DRAWING SET: 30F 5 DATE ‘CHANGED BY REVISION DESCRIPTION No. DRAWING PROGRAM: AutoCAD 2014 DRAWN: IGNUS 10/10/13 ANSWER 19 SAFETY VALVE DRAWING Ne. VALVE/101/2014 CHECKED: JOHN: 15/10/13 FILE NAME: valve10.dwg APPROVED: SUSAN 12/12/13 UNLESS OTHERWISE SPECIFIED ALL | MATERIAL: BRASS ee AQUA WATER | 72CHURCHSTREET | DIMENSIONS ARE IN MILLIMETRES Convention for the spring GRAAFF-REINET WITH A TOLERANCES OF: 0,15, HEAT TREATMENT: NONE EXAMINATION NUMBER ENGINEERS 6280 (SA) (Pty) Ltd awww.aqua.CO.Za UNLESS OTHERWISE SPECIFIED ALL SCALE: 1:2 B 049 898 2345 SURFACES TEXTURE FINISHES: 9/ | Quantity: 1500 EXAMINATION NUMBER [2 Copyright reserved Please tum over

Engineering Graphics and Design/P2 cg September 2014 Downloaded from hlayiso.com QUESTION 2: HELIX Given: The complete top view of a helical square screw thread. The centre point, C, of the top view Specification: Right-handed One and a half revolutions Outside diameter = 100 mm Core diameter = 52mm Pitch = 48mm Instructions: Using the given information, copy the top view and draw a front view with 1} turns of a helical square screw thread. Show the centre lines. Show ALL necessary construction. NO hidden detail is required in the front view. [37] ‘ASSESSMENT CRITERIA TOP VIEW + CLINES + 1 | Divisions + CONSTR 7 PITCH 2 | PLOTTING POINTS & 19 OUTSIDE CURVE 3 | PLOTTING POINTS & 6 INSIDE CURVE 4 | SHAFT + SIDES 5 TOTAL 37 EXAMINATION NUMBER EXAMINATION NUMBER [3 Copyright reserved Please tum over

Engineering Graphics and Design/P2 cg Downloaded from hlayiso.com — QUESTION 3: ISOMETRIC DRAWING Given: © The front view, left view and top view of a sliding guide © The position of point L on the drawing sheet 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. [41] Eee I = 5-FF I =a a) a1 CLT. i JIT 126 qf ==! a4 46 30 | | | | | 64 T l 18| 48 | 4: lag 36" 32__|i2|_ 32 ASSESSMENT CRITERIA 1 | AUX’ VIEWS + PLACING 3 2 | ISO’ LINES 233 3 | NON ISO’ LINES 5 4 | CIRCLE + CONSTR 6 5 | SECTIONING 3 TOTAL a EXAMINATION NUMBER EXAMINATION NUMBER [4 Copyright reserved Please tum over

Engineering Graphics and Design/P2 Downloaded from hlayiso.com 100 58. 42 r=) 4 | } WASHER September 2014 fi fi TTT Hi TTT 128 a q TT yl rT 26 2 L8 | 2 [2s 1 ee ; COVER rtT mtr 4 [ii n mh ani 4 i I (eh of Le 5| Is =| H H 88 1 i} 72 i i hF=—~ 1 I i 1 ' | | Re ° oo 2 i 1 ' ' H H 44 8 1 r 70 55 30 SLIDING BLOCK EXPLODED ISOMETRIC DRAWING QUESTION 4; MECHANICAL ASSEMBLY Given: © The exploded isometric drawing of the parts of a shaft support assembly, showing the position of each part relative to all the others * Orthographic views of each of the parts of the shaft support assembly. «Point S on the answer sheet. 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 shaft support assembly: 4.1 A sectional front view 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) 4.2 The right view. ALL drawings must comply with the guidelines contained in the SABS 0111. NOTE: * Align point S on the sliding block with point S on the base. * Show THREE faces of the nuts in the front view and ALL necessary construction * NO hidden detail is required. Insert the followi features on the drawing: © The cutting plane A-A [92] PARTS LIST PART QUANTITY MATERIAL 1. BASE 1 CAST IRON 2, SLIDING BLOCK 1 ‘CAST IRON 3. NUT 1 MILD STEEL 4. COVER 1 CAST IRON 5. WASHER 1 MILD STEEL 6, NUT 1 MILD STEEL 7. BUSH 1 BRASS 8. SHAFT 1 MILD STEEL OLD CAPE ROAD GREENBUSHES 6025 www ibayhisteel.co.za IBAYHI STEEL MANUFACTURING TILE SHAFT SUPPORT Od ALL DIMENSIONS ARE IN MILLIMETRES, ALL UNSPECIFIED RADII ARE R3. Copyright reserved Please tum over

cg ASSESSMENT CRITERIA SECTIONAL FRONT VIEW 1 | BASE 15} 2 | SLIDING BLOCK | 8} 3 | NUT 5 4 | COVER 5 rr 5 | WASHER % 2 6 | NUT 5 7 | BUSH 1 8 | SHAFT 1 H | HATCHING 16 SUBTOTAL 58} RIGHT VIEW + | Base 4 2 | COVER } 3 | WASHER 4 4 | NuT 3 5 | SLIDING BLOCK | 5 6 | SHAFT 3 SUBTOTAL 203 GENERAL 1 | cunes+aa 6 2 | assewary 7 SUBTOTAL 13 TOTAL 92 EXAMINATION NUMBER EXAMINATION NUMBER [6 Copyright reserved

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