Graphic Communication Nairn Academy Graphic Communication Department of Technological Education

GC Credit Paper – 2002 – Question 9 Department of Technological Education GC Credit Paper – 2002 – Question 9 A pictorial view (not shown on slide show) and detail drawings of a gate hinge are shown. Using the sizes from the detail drawings, draw, in the position given: A complete Plan of the assembled hinge, and (DA6) A Sectional Elevation of the assembly on XX. (DA10) Show hidden detail in the Plan only X X

GC Credit Paper – 2002 – Question 9 Department of Technological Education GC Credit Paper – 2002 – Question 9 Start by drawing the highest part of the assembly. This would mean drawing the left hand side of the Plan first. X X When this has been done draw the second top part of the assembly (in the case of this question this refers to the pin and has already been included in the given part Plan. Finish constructing the Plan by drawing the lowest part of the assembly. This part will include lines hidden by the top parts of the assembly. Finally darken the outlines to complete the Plan view.

GC Credit Paper – 2002 – Question 9 Department of Technological Education GC Credit Paper – 2002 – Question 9 To draw the Sectional Elevation, project the position down from the Plan and complete the crate for the view to fit in to. X Take each part individually and draw the outline where the cutting plane cuts the part. In this case the right hand part of the assembly has been drawn first. As nothing will hide any of these lines they can be darkened at this stage to make the drawing clearer to understand.

GC Credit Paper – 2002 – Question 9 Department of Technological Education GC Credit Paper – 2002 – Question 9 The second part of the assembly to be added to the Sectional Elevation is the pin. X When this has been located, darken the outlines to make the view easier to read.

GC Credit Paper – 2002 – Question 9 Department of Technological Education GC Credit Paper – 2002 – Question 9 Finally draw the last part of the assembly in the section and darken any outlines. X

GC Credit Paper – 2002 – Question 9 Department of Technological Education GC Credit Paper – 2002 – Question 9 As the question asks that hidden lines are not added to this view, there is only one further task to do to complete the section view. Any sectioned view should show where the object has been cut, and this is done by ‘cross hatching’ any cut surfaces. Cross hatch each full part in the same direction and at the same angle. X Each of the other parts should be cross hatched at a different angle to that already used. Parts such as webs, pins, bolts, etc. do not become cross hatched, so in this case only two parts need to be done.

GC Credit Paper – 2002 – Question 9 Department of Technological Education GC Credit Paper – 2002 – Question 9 The finished drawing should look like this. X X

GC Credit Paper – 2002 – Question 9 Department of Technological Education GC Credit Paper – 2002 – Question 9 This drawing was awarded 16 Drawing Ability marks. The following slides show the official marking scheme for this drawing.

GC Credit Paper – 2002 – Question 9 The Marking Scheme – box a Department of Technological Education GC Credit Paper – 2002 – Question 9 The Marking Scheme – box a Correct length of assembled parts on Plan. 1 mark X X

GC Credit Paper – 2002 – Question 9 The Marking Scheme – box b Department of Technological Education GC Credit Paper – 2002 – Question 9 The Marking Scheme – box b Drawing semi circle (full) on Plan. 1 mark X X

GC Credit Paper – 2002 – Question 9 The Marking Scheme – box c Department of Technological Education GC Credit Paper – 2002 – Question 9 The Marking Scheme – box c Drawing semi circle (hidden) on Plan. 1 mark X X

GC Credit Paper – 2002 – Question 9 The Marking Scheme – box d Department of Technological Education GC Credit Paper – 2002 – Question 9 The Marking Scheme – box d Vertical line showing correct width of upright on Plan. 1 mark X X

GC Credit Paper – 2002 – Question 9 The Marking Scheme – box e Department of Technological Education GC Credit Paper – 2002 – Question 9 The Marking Scheme – box e Draw two horizontal lines to show width of fillets on Plan. 1 mark X X

GC Credit Paper – 2002 – Question 9 The Marking Scheme – box f Department of Technological Education GC Credit Paper – 2002 – Question 9 The Marking Scheme – box f Draw two horizontal hidden lines on Plan to show size of fixing holes at right side of assembly. 1 mark X X

GC Credit Paper – 2002 – Question 9 The Marking Scheme – box g Department of Technological Education GC Credit Paper – 2002 – Question 9 The Marking Scheme – box g Draw vertical lines on left part of assembly on sectional view. 1 mark X X

GC Credit Paper – 2002 – Question 9 The Marking Scheme – box h Department of Technological Education GC Credit Paper – 2002 – Question 9 The Marking Scheme – box h Drawing horizontal lines of left part of assembly on sectional view. 1 mark X X

GC Credit Paper – 2002 – Question 9 The Marking Scheme – box i Department of Technological Education GC Credit Paper – 2002 – Question 9 The Marking Scheme – box i Draw vertical lines on right part of assembly on sectional view. 1 mark X X

GC Credit Paper – 2002 – Question 9 The Marking Scheme – box j Department of Technological Education GC Credit Paper – 2002 – Question 9 The Marking Scheme – box j Drawing horizontal lines of right part of assembly on sectional view. 1 mark X X

GC Credit Paper – 2002 – Question 9 The Marking Scheme – box k Department of Technological Education GC Credit Paper – 2002 – Question 9 The Marking Scheme – box k Draw two holes on right hand part of assembly. 1 mark X X

GC Credit Paper – 2002 – Question 9 The Marking Scheme – box l Department of Technological Education GC Credit Paper – 2002 – Question 9 The Marking Scheme – box l Draw hinge pin in sectional view. 2 marks X X

GC Credit Paper – 2002 – Question 9 The Marking Scheme – box m Department of Technological Education GC Credit Paper – 2002 – Question 9 The Marking Scheme – box m Sectioning of both parts of the assembly. 2 marks X X

GC Credit Paper – 2002 – Question 9 The Marking Scheme – box n Department of Technological Education GC Credit Paper – 2002 – Question 9 The Marking Scheme – box n Correct sectioning conventions shown 1 mark X X

PowerPoint Presentation produced by John McRae, Nairn Academy 2003