Isometric Drawing is one of 9 topics in the Grade 12 Engineering Graphics and Design CAPS syllabus, covered across 3 lessons on Study Vault. Below are real practice questions from this topic with full worked answers.
Sample practice questions
Easy
1. At what angle are the three isometric axes drawn to each other from a common origin point?
120 degrees
90 degrees
60 degrees
180 degrees
Answer: 120 degrees — The three isometric axes are drawn at 120 degrees to each other from a common origin point.
Easy
2. Can an isometric line be measured directly at its true length on an isometric drawing?
Yes, since isometric lines run parallel to the isometric axes and the system preserves length along those directions
No, isometric lines can never be measured directly
Only non-isometric lines can be measured directly
Isometric lines are always drawn at half their true length
Answer: Yes, since isometric lines run parallel to the isometric axes and the system preserves length along those directions — An isometric line runs parallel to one of the three isometric axes, and the isometric system is specifically constructed to preserve true length measurement along these axis directions.
Medium
3. Name the type of line, such as a sloped edge or the diagonal of a rectangular face, that does NOT run parallel to any isometric axis.
Answer: a non-isometric line — A non-isometric line does not run parallel to any of the three isometric axes, and cannot be measured directly at true length on the isometric drawing.
