portfolio

INDEPENDENT SCHOOLS TRIAL EXAMINATION 2017: ENGINEERING GRAPHICS AND DESIGN: PAPER 2 P BQ A ANSW ER SHP MOODLEY COPYRIGHT © 2017

PAGE 4 OF 7 TRIALS 2017 GRADE 12 P2 QUESTION 2.2 20 MARKS MECHANISM C The figure below shows a CRANK mechanism. O SPECIFICATIONS: - Rod AB is attached to rod BC at B.SHEET 2.2 - Rod BC is attached to the anchor wheel at C. - The anchor wheel rotates in a clockwise direction about point O. - Point A is a fixed point that does not move. - Rod AB pivots about point A. - Point B is a movable point that moves back and forth according to the mechanism movement. - Rod PQ is attached to rod BC and is perpendicular to rod BC. REQUIREMENTS: 2.2.1. Draw the locus of point P 2.2.2. Show all construction ASSESSMENT CRITERIA 11 You will be assessed on your ability to do 6 the following: 3 plot the points for the locus show all construction draw a neat locus DO NOT DRAW ON THIS DIAGRAM10 C P Q O B Pts 40 11 A Con 6 NAME Loc 3 PLEASE TURN OVER

INDEPENDENT SCHOOLS TRIAL EXAMINATION 2017: ENGINEERING GRAPHICS AND DESIGN: PAPER 2 Points = 29 Circle Arcs =4 Circle Const =2 Centre Lines =2 Construction =2 X- Hatching =5 non-Hatching =2 Hatching Angle = 2 =2 50 P ANSW ERHP MOODLEY COPYRIGHT © 2017

PAGE 5 OF 7 TRIALS 2017 GRADE 12 P2 QUESTION 3 50 MARKS ISOMETRIC PROJECTION The figure below shows the front view, top view and right view of a Casting, drawn in third angle orthographic projection. The Casting is cut by a cutting plane A-A. REQUIREMENTS: - Use your instruments to draw a Sectional Isometric view of the casting, on the cutting plane A-A. - Do NOT show hidden details. - Show all construction. - X-Hatch all the sectioned areas. - Use scale 1:1. - Make point P your lowest point on the drawing. ASSESSMENT CRITERIA You will be assessed on your ability to do the following: draw the isometric view 29 draw the isometric circle arcs 4 draw the isometric circle construction 2 draw all centre lines 2 draw the construction 2 X-Hatch all sectioned areas 5 show areas of non-hatching 2 X-hatch at the appropriate angle 2 Position the drawing correctly 2 30 20 65 p1 10 Ø40 A 25 50 1060° Pts 20 R15 A p 150° 60 Arcs p2 15 7 NAME CCo 2SHEET 3 Cls 2 Con 2 Xhat 5 XAgl 1 Posi 1 PLEASE TURN OVER

INDEPENDENT SCHOOLS TRIAL EXAMINATION 2017: ENGINEERING GRAPHICS AND DESIGN: PAPER 2 ♠ ♣ ♣♠ ♠ ♠ΩΩ ☺☺☺ TITLE:FUEL FILTER ASSEMBLY PROJECTION SCALE: SCALE 1:1 SYMBOL HEADING: SECTION A-A ANSW ERHP MOODLEY COPYRIGHT © 2017

PAGE 7 OF 7 TRIALS 2017 GRADE 12 P2 QUESTION 4 90 MARKS MECHANICAL ASSEMBLY ASSESSMENT CRITERIA ♣ 4 2 ♠ ♠ 38 23♠ ♠ ♠ ♠ ♠ ♠♣ 6 ♠ ♠ ♠ ♠ 3 ♠ ♠ 38 ♠ ♠ ♠ 16 ♠ ♠ 2 ♠ ♠ 4 2 ♠ ♠ 3 4 ♠ ☺ 1 ♠ Ω LEFT VIEW 14 ♠ ♠ ♣ 3 ♠ 9 3 ♠ 3 2 ☺ Ω ♠ ♠ ♠ ♠ TOTAL 180 Ω ♠ Ω TOTAL 90 Ω Ω ♠ ☺ ☺☺ NAMER SHEET 4