Irrigation, Drainage & Water Supply is one of 9 topics in the Grade 12 Agricultural 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 large, self-propelled overhead irrigation system rotates slowly around a central point to water a circular area?
A centre pivot system
A linear (lateral move) system
A subsurface drainage system
A tensiometer
Answer: A centre pivot system — A centre pivot system is a large, self-propelled overhead system that rotates around a central pivot point, watering a large circular area.
Easy
2. What limitation does a centre pivot system have on a square field?
It leaves the corners of the field unwatered
It cannot water any part of a square field
It only works on perfectly circular fields with no other shape possible
It requires the entire field to be re-shaped into a circle first
Answer: It leaves the corners of the field unwatered — A centre pivot system waters a circular area, leaving the corners of a square field unwatered, a limitation sometimes addressed with a corner extension arm.
Medium
3. Name the overhead irrigation system that travels in a straight line across a rectangular field, watering the full field including corners.
Answer: linear system — A linear (lateral move) system travels in a straight line across a rectangular field, watering the entire field including corners that a centre pivot would miss.
