Orthographic Projection: Civil 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. What is a floor plan?
A horizontal sectional view of a building, showing the arrangement of rooms as seen looking down into it
An external view of one face of the building
A view showing only the roof structure
A drawing showing only electrical wiring
Answer: A horizontal sectional view of a building, showing the arrangement of rooms as seen looking down into it — A floor plan is a horizontal sectional view, taken as if a cutting plane sliced through the walls and the top portion were lifted away, showing room arrangement as seen looking down.
Easy
2. What distinguishes a sectional elevation from a plain elevation?
A sectional elevation additionally has a vertical cutting plane passed through the structure, revealing internal detail
A sectional elevation shows only the roof, while a plain elevation shows the whole building
A plain elevation always shows more internal detail than a sectional elevation
There is no real difference between the two
Answer: A sectional elevation additionally has a vertical cutting plane passed through the structure, revealing internal detail — A sectional elevation combines an elevation view with a vertical cutting plane through the structure, revealing internal detail such as wall construction and floor/ceiling levels, unlike a plain elevation.
Medium
3. Grade 12 civil sectional elevations must show internal detail continuously from which two points of the building?
Answer: foundation to roof — Grade 12 requires sectional elevations to show internal detail continuously from the foundation all the way up through to the roof in one continuous view.
