DESIGN & COMMUNICATION GRAPHICS

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Candice Mills
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1 *WMS19* PRE-LEVING CERTIFICTE EXMINTION, 2015 MRKING SCHEME DESIGN & COMMUNICTION GRPHICS HIGHER ND ORDINRY LEVEL 35 Finglas Business Park, Tolka Valley Road, Finglas, Dublin 11 T: , F: , E: W: Page 1 of 22

2 HIGHER LEVEL -1 Parallel plane on elevation and plan 4 ux view 5 2nd ux view 5 Draw SD 2 Elevation and plan of SD 4-2 (a) Completion of elevation Division of plan 4 Projection lines to auxiliary elevation 4 Determine heights in elevation 4 Complete front elevation 4 (b) True shape 4-3 (a) Second vanish point 3 (b) Determine base 6 Complete sides 6 (c) Determine height 5-4 (a) Determine focal sphere 5 (b) Major axis 4 Minor axis 6 (c) Draw curve 5 B-1 (a) xonometric axes and scalene triangle 9 (b) Outline elevation 8 Outline plan 8 Outline trimetric projection 12 Curves 8 B-2 (a) Plan and elevation of BEC 6 (b) Point 2 Method for point D 8 (c) Determine dihedral angle XY parallel to LOI 6 Projection of lines 6 XY Perp to LOI 6 Complete dihedral angle 6 (d) True shape 5 B-3 (a) Plan and elevation of pyramid 6 (b) Elevation of inclined prism 5 Plan of inclined prism 5 (c) Method Turning points (6) 12 Piercing points (6) 12 Completion 5 C-1 (a) Earthworks to B Parallel lines to road for cut/fill 4 Draw curves 4 Earthworks B to C Cut Required arc/ 4 Parallel lines 4 Intersections & curve 4 Embankment Required arc 4 Parallel lines 4 Intersections & curve 4 (b) Draw triangle in plan & elevation 2 Strike line 2 Dip 2 (c) XY line & borehole from F at 70 2 Determine footwall 1 Thickness 4 C-2 (a) Draw plan of base circle 4 Elevation of base circle 4 Plan & elevation of 40m element 10 Determine base circle 10 Method for curve & complete 4 (b) Draw parabola 6 Complete projections in plan 7 C-3 (a) Draw outline plan surface BC 6 Determine height of elevation 6 Complete elevation of BC 6 (b) Determine height of surface D and E 6 Complete plan and elevation 6 (c) Determine angle of inclination of E 5 (d) Determine dihedral angle between and B 10 C-4 (a) (b) Link mechanism Draw line diagram and 90 arc 2 Divide circle into equal parts 2 Locate positions for point C 8 Draw required locus 2 Machine guard around mechanism 3 Displacement diagram 360 division (widths on displacement diag.) 3 0 to 180, rise uniform acceleration and retardation to 270, dwell to 360, fall with uniform velocity 3 Complete displacement diagram 2 Cam profile Draw cam profile 10 Presentation complete (b) 3 C-5 Correct assembly of parts 15 Sectional elevation 20 Correct use of conventions 10 Page 2 of 22

3 Y1-1 C D B X Y X2 D X1 Y2 B C -2 Y1 X T Y X1 H Page 3 of 22

4 P.P. Half major axis -3 VP1 VP2 True Height of Structure -4 F V Focal sphere Page 4 of 22

5 B-1 Y Z X Page 5 of 22

6 B-2 B E D C C C D E B D E B C B D 169 True shape of surface BCD X Y E Dihedral ngle Page 6 of 22

7 B-3 Page 7 of 22

8 C E D F h 70 Strike angle (110 West of North) E 60m Dip ngle 34 h E C B Page 8 of 22

9 C-2 40m Page 9 of 22

10 C True angle of inclination of surface E Dihedral ngle D E 60 Page 10 of 22

11 C-4(a) (i) Locus of Point C C6 C5 C4 C3 C2 C1 C T 6 (ii) Machine Safety Guard at 20mm B Page 11 of 22

12 C-4(b) Cam Profile Displacment Diagram Page 12 of 22

13 C-5 N.B. Only the sectional elevation - is required. - 1 : 1 Page 13 of 22

14 ORDINRY LEVEL -1 Determine vertex 6 Construction to determine points on curve 8 Complete curve 6-2 (a) Completion of elevation 10 (b) Determine the true angle of inclination 10-3 Projection lines to spectator 4 Outline of stock of try square 6 Outline of blade 6 Completion 4-4 (a) Elevation of sphere 6 (b) Construction spheres 4 Project to plan 3 rcs intersecting in plan 3 Elevation and plan of required sphere 4 B-1 (a) Outline front elevation /plan pillar 10 Outline front elevation/plan wall 10 Interpenetration on LHS 6 Interpenetration on RHS 6 (b) End elevation 9 Completion & presentation 4 B-2 (a) (b) Elevation Pedestal 6 Bollard 6 Plan Pedestal 6 Bollard 6 (c) X1Y1 line & projection lines 3 Correct height lines 2 Outline of base 5 Outline of bollard 6 Completion & presentation 5 B-3 (a) Set up axes & triangle 5 (b) Complete elevation 7 Complete plan 7 Projection lines from plan & elevation 4 (c) Complete axonometric projection of main body 7 Chamfer 5 Thumb lock 5 Completion & presentation 5 C-1 (a) Profile Heights & horizontal lines 5 Projection lines 5 Outline profile 5 (b) Tangent to profile 4 Indicate height 4 (c) Parallel lines 6 Points for cut & fill 6 Draw curve 6 Completion & presentation 4 C-2 (a) Outline plan and elements 12 Outline elevation and elements 12 (b) Outline endview 8 Elements in end view 8 Presentation 5 C-3 (a) Plan 8 Elevation 8 (b) Development of base 4 Development of sides 8 Development of curved surface 8 Development of top 4 Completion 5 C-4 (a) Displacement diagram (27) 360 division (widths on displacement diagram) 6 Correct use of 60mm height 2 Establish follower position at 0, 90, 180 and to 180, simple harmonic motion to 270, dwell to 360, uniform velocity 6 Complete displacement diagram 3 (b) Cam profile (14) Cam centre and nearest approach 2 Camshaft 1 ngular divisions corresponding to displacement diagram 3 Correct direction of rotation 1 Identify points on the profile 3 Draw the cam profile 4 Presentation 4 C-5 Correct ssembly of parts 15 Sectional elevation 20 Correct use of conventions 10 Page 14 of 22

15 -1 V F -2 X X Y 45 Y Page 15 of 22

16 -3 P.P. VP 2 VP 1-4 X C 1 Y B C1 Page 16 of 22

17 B-1 END ELEVTION FRONT ELEVTION PLN Page 17 of 22

18 B-2 X1 True shape of surface Y1 B-3 Page 18 of 22

19 C m B C D Page 19 of 22

20 C-2 C C B D B D END ELEVTION FRONT ELEVTION B D C PLN C-3 x SURFCE DEVELOPMENT Top ELEVTION Curved surface PLN Side Base Side Page 20 of 22

21 C Displacement Diagram Page 21 of 22

22 C-5 SECTION - SCLE 1 : 1 Page 22 of 22

Design & Communication Graphics Higher Level Section A (60 Marks)

M.85A ªM.858 Leaving Certificate Examination, 2009 Design & Communication Graphics Higher Level Section A (60 Marks) Time: 3 Hours This examination is divided into three sections: SECTION A SECTION B SECTION