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ENGINEERING, AE 2025 HSC 19 MC

The orthographic views of a part are shown.
 

What is the total number of true lengths that are visible in ALL three views?

  1. 9
  2. 10
  3. 12
  4. 15
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\(B\)

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  • A true length appears when a line is parallel to the projection plane — it shows its actual length in that view.
  • Top view: the base rectangle has 4 true length edges; the base diagonal is also a true length = 5 true lengths.
  • Front view: the base line is true length; one slant edge is true length = 2 true lengths.
  • Side view: the base line is true length; both slant edges are true length = 3 true lengths.
  • Total: \(5+2+3=10\)

\(\Rightarrow B\)


♦♦♦ Mean mark 30%.

ENGINEERING, AE 2020 HSC 21c

The following drawing provides a series of orthographic views of a machine part, supported by a 'modified' title block. Some of the features have been labelled with the numbers 4 to 10.

 

With reference to the orthographic views and the modified title block, complete the table below.   (4 marks)
 

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Mean mark 51%.