Fig. 3 shows an engineering component drawn as a sectional view cut along the line X-X. The item shown is commonly used in design and technology projects. I...
Question 1 Report
Fig. 3 shows an engineering component drawn as a sectional view cut along the line X-X. The item shown is commonly used in design and technology projects. It has been designed and manufactured to meet specific requirements.
It sits on the floor. The handle is round. The grip stops it from slipping.
(a) Name the drawing technique used to reveal the internal features of this component. [1]
(b) State the purpose of the lines shown at A on the cut surface. [1]
(c) The drawing is at a scale of 1:2. The overall width on the drawing measures 45 mm. Calculate the actual width of the component. [1]
[Total: 3 marks]
Answer Details
(a) The drawing technique used to reveal the internal features of this component is a sectional view (section drawing or cross-section) [1]. This technique imagines the component being cut along a defined cutting plane (here the line X-X) and one half removed, allowing the internal structure, wall thicknesses, and hollow sections to be clearly shown.
(b) The lines shown at A on the cut surface are hatching lines [1]. Their purpose is to indicate areas where the cutting plane has passed through solid material. The hatching distinguishes solid material from open spaces, cavities, or holes within the component. By convention, hatching lines are drawn at 45 degrees and evenly spaced.
(c) The drawing is at a scale of 1:2, which means the drawing is half the actual size of the real component. To find the actual width:
\[ \text{Actual width} = \text{Drawing measurement} \times \text{Scale factor} = 45 \times 2 = 90 \text{ mm} \] [1]
The actual width of the component is 90 mm.
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