Graphics: Working Drawings, Arches & Door Frames is one of 9 topics in the Grade 11 Civil Technology 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 the standard method of representing a three-dimensional building as a set of related two-dimensional views, each viewed at 90 degrees to the previous?
Orthographic projection
Isometric drawing
Freehand sketching
Site planning
Answer: Orthographic projection — Orthographic projection is the standard method of representing a three-dimensional building as a set of related two-dimensional views (plan, front elevation, side elevation), each viewed at 90 degrees to the previous.
Easy
2. What does a section drawing reveal that an external elevation alone cannot show?
Internal construction detail, such as foundation depth or wall/floor construction
Only the external colour scheme of the building
The building's position on its stand
The site's boundary lines
Answer: Internal construction detail, such as foundation depth or wall/floor construction — A section shows a building as though cut through along an imaginary vertical plane, revealing internal construction detail not visible from an external elevation alone.
Medium
3. At what angle (in degrees) to the horizontal are the receding lines of a standard isometric drawing commonly drawn?
Answer: 30 — In a standard isometric drawing, vertical lines are drawn truly vertical and horizontal lines are drawn at a consistent angle, commonly 30 degrees, to the horizontal.
