Quantities & Costing is one of 9 topics in the Grade 12 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. Which formula is used to calculate the volume of concrete needed for a foundation or slab?
Volume = length x width x depth
Volume = length + width + depth
Volume = length x width only
Volume = width x depth only
Answer: Volume = length x width x depth — Concrete volume is calculated as length x width x depth (all in the same unit), giving a result typically expressed in cubic metres.
Easy
2. In a 1:2:4 concrete mix ratio, what do the three numbers represent, in order?
Cement : sand : stone (aggregate)
Sand : stone : cement
Water : cement : sand
Stone : cement : sand
Answer: Cement : sand : stone (aggregate) — A 1:2:4 mix ratio is conventionally read as cement : sand : stone (aggregate), by volume.
Medium
3. A strip foundation trench is 24 m long, 0,6 m wide and 0,5 m deep. Calculate the volume of concrete needed, in cubic metres.
