TRIAL EXAMINATION 2012

Transcription

1 ENGINEERING GRAPHICS AND DESIGN - TRIAL PAPER TWO - 0 education Department: Education KwaZulu - Natal GRADE ENGINEERING GRAPHICS AND DESIGN P TRIAL EXAMINATION 0 S : 00 TIME : HOURS This question paper consists of pages. NAAM VG@WHSS TRIAL P 0 INSTRUCTIONS AND INFORMATION. The question paper consists of FOUR questions.. Answer ALL the questions.. All drawings are in third-angle orthographic projection unless otherwise stated.. All drawings must be drawn to scale :, unless otherwise stated.. The questions must be answered on the answer sheets provided.. All the answer 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 in the block provided on every answer sheet.. All answers must be drawn accurately and neatly. 0. Any details or dimensions not given must be assumed in good proportion. FOR OFFICIAL USE ONLY QUESTION ONE TWO THREE LEARNER'S 0 MODERATED FOUR 00 TOTAL 0 0 FINAL CONVERTED CHECKED BY 00 Page of

2 COASTAL STEEL MANUFACTURING P.O.Box JACOBS Tel. 0 0 Fax. 0 0 Galvanised Mild Steel TOLERANCE : 0.0 PIPE SUPPORT SCALE : VIEW /0/ Fahim Diameter of holes 0 DATE CHANGE BY REVISION DESCRIPTION NO. A A /0/ Anand Welding details 0 APPROVED BY Fareed /0/ CHECKED BY Harry 0/0/ DRAWING SYSTEM Autocad DRAWING NUMBER / FILE RHG / DRAWN BY Vishnu 0/0/ 0 VIEW Draw the projection symbol used in this drawing. TOTAL ANSWER QUESTION IN THIS BLOCK 0 What does the symbol at c indicate? w Letter b is a welding symbol. What is the correct representation of this symbol? 00 Explain in detail all the information found in the symbol next to a. 0 0 Calculate the dimension at x. What is the dimension at y? Determine the dimension at w. 0 What would view be called? y What would view be called? milled 0. O. = x What was the reason for the last revision? a What was the date of the first revision? What scale is indicated for the drawing? From what material is the pipe support made? What is the drawing number? What is the title of the drawing? Who approved the drawing? On what date was the drawing checked? NO. QUESTIONS ANSWERS S b G c QUESTION ONE : MECHANICAL ANALYTICAL Given : The working drawing of a Pipe Support, shown in first angle orthographic projection, with a title block and a table of questions. Instructions : Complete the table below by neatly printing the answers to the questions, which all refer to the accompanying drawings and title block. ENGINEERING GRAPHICS AND DESIGN - TRIAL PAPER TWO - 0 Page of

3 ENGINEERING GRAPHICS AND DESIGN - TRIAL PAPER TWO - 0 HELIX ANGLE = 0 P P QUESTION. The side view, incomplete front view and part development of a transparent cylinder together with the direction of rotation is given. Draw: Draw turns of a helix from point P. Show all constructions or calculations. VG@WHSS TRIAL P 0 0 Page of GRAPH OF DISPLACEMENT SCALE : mm=0 ROTATION QUESTION. The cam profile together with the cam shaft, follower and direction of rotation is given. Motion of the follower: Over the first 0 the follower rises with uniform acceleration and retardation motion. The follower is then at rest for the next 0. The follower then rises with uniform motion over the next 0. The follower returns to its original position with simple harmonic motion. From the given information draw: The displacement graph with a horizontal scale of mm equals 0 and the vertical scale of :. QUESTION TWO ING CRITERIA QUESTION. POINTS ( ) CALC/CONSTRUCTION TOTAL QUESTION. CONSTRUCTION TOTAL (. +.) 0

4 ENGINEERING GRAPHICS AND DESIGN - TRIAL PAPER TWO - 0 VG@WHSS TRIAL P 0 0 A TOTAL HATCHING ISO CIRCLE AND CONST. CENTRE LINES CALC/CONSTRUCTION SURFACES ING CRITERIA 0 0 A R0 QUESTION Three views of a shaped block are given in third angle orthographic projection. Draw: using instruments a neat sectioned isometric view of the shaped block on cutting plane A-A. Do not show hidden detail and dimensions. Show all constructions and/or calculations. Page of

5 TAPERED PIN WITH LUG HEAD Ø R Ø 0 M0 x. Ø Ø 0 LEVER 0 0 Ø Ø X Ø0 Ø0 CHAMFERED Ø. M0 NUT ENGINEERING GRAPHICS AND DESIGN - TRIAL PAPER TWO - 0 Ø SQUARE KEY M x 0 M0 x, X Ø0 Ø Ø. M NUT VG@WHSS TRIAL P 0 0 M0 x. Page of QUESTION FOUR - MECHANICAL ASSEMBLY The diagram shows the component parts for a sub assembly of a Rotary Lever which turns with its centre spindle. The lever is shown in third angle orthographic projection. Draw full size in third angle orthographic projection the following views of the complete assembly:. a sectional front view on X - X.. an outside top view. show all centre lines, projection symbol, title, scale and all necessary constructions. Do not show hidden detail and dimensions. COMPONENT LIST ITEM QTY LEVER SQUARE KEY M NUT TAPERED PIN WITH LUG HEAD CHAMFERED M0 NUT GOUNDEN ENGINEERING BAYERN ROAD NEW GERMANY PINETOWN 0 vgounden@yahoo.com 0GOUNDEN ROTARY LEVER SUB-ASSEMBLY ALL DIMENSIONS ARE IN MILLIMETRES ALL UNSPECIFIED RADII ARE R

6 ENGINEERING GRAPHICS AND DESIGN - TRIAL PAPER TWO - 0 VG@WHSS TRIAL P 0 Page of QUESTION FOUR - MECHANICAL ASSEMBLY. TOP VIEW ITEM QTY LEVER & FILLETS ( ) CUTTING PLANE ( ) M NUT TAPERED PIN WITH LUG HEAD CHAMFERED M0 NUT 0 CENTRE LINES SUB-TOTAL. TITLES; SCALE; SYMBOL. SECTIONED FRONT VIEW ITEM LEVER SQUARE KEY M NUT TAPERED PIN CHAMFERED M0 NUT 0 HATCHING 0 NO HATCHING CENTRE LINES SUB-TOTAL TOTAL 00