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The 3D graphic on the right shows a cooker hood made from copper - Leaving Cert DCG - Question B-2 - 2016
Question B-2
The 3D graphic on the right shows a cooker hood made from copper. Fig. B-2 below shows an isometric view of the hood. (a) Draw an elevation of the structure in the... show full transcript
Worked Solution & Example Answer:The 3D graphic on the right shows a cooker hood made from copper - Leaving Cert DCG - Question B-2 - 2016
Step 1
Draw an elevation of the structure in the direction of the arrow.
Answer
To draw the elevation, first outline the base section of the cooker hood. It starts with a rectangular base measuring 50 cm by 50 cm, transitioning to a trapezoidal upper section. Ensure the height of the base section is accurately represented at 40 cm, and the top section rises to 20 cm. The outline should also account for perspective, showing the slant of the sides. The elevation will include a clear depiction of the hood's geometry, ensuring all measurements are proportional.
Step 2
Draw a plan projected from the elevation.
Answer
For the plan view, project the outline of the base section that measures 50 cm by 50 cm. This should be marked at the bottom of the plan. Then, draw the upper section as a narrower trapezoid with a top width aligning with the base's corners. Ensure that the plan includes dashed lines that represent the hidden components of the structure, such as vertical edges and the slant of the upper section.
Step 3
Draw an auxiliary elevation of the structure, projected from the plan, which will include the true shape of surface A.
Answer
Begin by establishing the reference line X,Y, which will be parallel to the plane of surface A. Extend lines from the plan to project the height of elevations onto the auxiliary view. This will allow for a true representation of surface A. Draw the surface A as accurately reflecting the dimensions from both the elevation and the plan, ensuring angles and widths are proportionate. Finally, complete the auxiliary elevation with necessary annotations for clarity.