A-2. The image below shows a drawing board and two set squares - Leaving Cert DCG - Question A-2 - 2020
Question A-2
A-2. The image below shows a drawing board and two set squares. The drawing on the right shows the plan and incomplete elevation of a similar drawing board with a 30... show full transcript
Worked Solution & Example Answer:A-2. The image below shows a drawing board and two set squares - Leaving Cert DCG - Question A-2 - 2020
Step 1
Projection of points to elevation
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Answer
To complete the elevation of the drawing board and set squares, begin by projecting the key points from the plan into the elevation. Identify the appropriate locations for points A, B, and C from the drawing, ensuring to maintain alignment with the xy-plane of the elevation.
Step 2
Completion of elevation of drawing board
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Draw the complete elevation of the drawing board rectangle. Use the dimensions visible in the plan to reflect the actual height and width in your elevation, ensuring to account for the angles and slopes created by the set squares.
Step 3
Location of 3 remaining lines of 30º/60º set square in elevation
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Add the elevation lines corresponding to the 30º/60º set square. This will require projecting the previously identified points (A, B, C) at the respective angles indicated to illustrate the triangular section.
Step 4
Location of 3 lines of 'outer triangle' of 45º set square in elevation
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Next, draw the outer triangle of the 45º set square in elevation. This should include the lines extending from the top point down to where they intersect with the baseline of the drawing board.
Step 5
Location of 3 lines of 'inner triangle' of 45º set square in elevation
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Finally, show the inner triangle of the 45º set square. This will involve projecting the relevant angles from the previously established points to create the inner triangular profile in elevation.
Step 6
Draw projections of line inclined at 45º to bottom edge of board
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From point A, draw the line projected onto the elevation at a true angle of 45º to the bottom edge of the board. Use a protractor to ensure accuracy in the angle.
Step 7
Draw correct required line in elevation and plan
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Answer
Concisely depict the projections of the line in both the elevation and the plan views. Use dashed lines to indicate parts of the line not visible in the elevation, ensuring the 50mm length is accurately represented.
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