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C-3. The image on the right shows a digger bucket - Leaving Cert DCG - Question C-3 - 2022
Question C-3
C-3. The image on the right shows a digger bucket. The projections of a similar digger bucket are shown in Fig. C-3 below. All teeth are equal in width. (a) Draw t... show full transcript
Worked Solution & Example Answer:C-3. The image on the right shows a digger bucket - Leaving Cert DCG - Question C-3 - 2022
Step 1
Draw the given plan and elevation of the digger bucket.
Answer
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Draw Straight Edges in Elevation: Start with the vertical sections of the bucket in elevation. Set the correct dimensions by establishing a baseline. Ensure that the angles and proportions match those in the provided image.
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Determine Centre and Draw Semi-Circle: Identify the center point of the arc (R40) at the top of the bucket. Draw a semi-circle with this radius to reflect the curved shape of the bucket.
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Draw Outline Plan: Switch to the plan view perspective. Outline the entire shape of the bucket while incorporating the base dimensions and the curved arc from the elevation to maintain accuracy and proportions.
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Complete Plan: Finish the drawing by ensuring all details are added, including lines that represent the teeth and any specific contours or design elements as shown in the figure.
Step 2
Project an end view of the bucket.
Answer
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Correct Heights and Widths for End View: Begin by establishing a baseline for the end view. Reference the overall width and height from the plan and elevation previously drawn. Ensure all dimensions match to accurately reflect the profile of the digger bucket.
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Draw the End View: Using the correct height and width, sketch the end view that captures the bucket’s contour and tooth layout. This should include any necessary details like the arc formed at the top and the flat surface at the base.
Step 3
Draw a one-piece surface development of the digger bucket.
Answer
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Appropriate Layout of Surface Development: Start by deciding how to lay out the development on a flat surface. The goal is to represent the curved and straight parts of the bucket as they would appear when unfolded.
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Development of Bottom Surface: Draw the flat base section accurately maintaining the overall width.
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Development of Front Surface: Detail the front curvature, ensuring you correctly follow the semi-circle radius. This involves accurately measuring the distance from the base to the top.
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Development of Back Surface: Reflect the same curvature and dimensions on the back surface, ensuring both sides mirror correctly.
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Division of Arc: Mark equal sections along the arc for a clear representation of the curvature being shown in the plan view.
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Development of Curved Surface: Represent the curved surface in segments or as a continuous curve, based on the divisions specified.
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Division of Top Surface: Indicate how the top surface divides into sections to enhance fabrication understanding.
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Presentation: Finally, ensure that the layout is clean, with clear lines and adequate labels to communicate the details effectively.