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The 3D graphic on the right shows a string of pearls hanging on a necklace easel - Leaving Cert DCG - Question B-1 - 2009
Question B-1
The 3D graphic on the right shows a string of pearls hanging on a necklace easel. The easel consists of a front stand and a rear support as shown. The projections o... show full transcript
Worked Solution & Example Answer:The 3D graphic on the right shows a string of pearls hanging on a necklace easel - Leaving Cert DCG - Question B-1 - 2009
Step 1
Draw the given plan and elevation of the easel.
Answer
To draw the plan and elevation of the easel, follow these steps:
- Plan View: Start by sketching a rectangle to represent the base of the easel on the X-Y grid, taking into consideration the dimensions indicated. Include the parabolic curve representing where the necklace hangs, ensuring to reflect the outline accurately on the grid.
- Elevation View: For the elevation, draw the outline of the easel standing up, including its height of 200mm. Ensure to illustrate the angle of the easel accurately based on the 3D graphic, with the parabolic outline showing the same curve as in the plan view.
Step 2
Draw the outline of the necklace in plan and in elevation.
Answer
In both views, the necklace can be represented as a series of points forming a parabolic curve.
- Plan View: On the plan, sketch the parabolic curve following the grid. This should be symmetric about the vertical axis, reflecting the arrangement of pearls.
- Elevation View: In the elevation, represent the necklace's depth by drawing similar curves but adjusting their height to reflect how the necklace would appear from this angle.
Step 3
Determine the traces of the oblique plane that contains: (i) The Front stand;
Answer
The front stand's trace can be determined by projecting its outlines onto the X-Y plane. This will create a line where the front stand meets the ground, and it should be drawn at an angle consistent with its elevation representation.
Step 4