Energy Systems & Electric Fencing 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. Which electric fence component converts mains or battery power into short, high-voltage pulses sent down the fence line?
The energiser
An insulator
An earth stake
A fence tester
Answer: The energiser — The energiser (fence charger) converts mains electricity or battery power into short, high-voltage pulses sent down the fence line roughly once per second.
Easy
2. What is the role of an insulator on an electric fence post?
Holding the live wire away from the post to prevent the pulse draining into the ground
Generating the high-voltage pulse
Completing the earth return circuit
Testing the voltage present on the line
Answer: Holding the live wire away from the post to prevent the pulse draining into the ground — Insulators are non-conductive fittings that hold the live wire away from the fence post, preventing the electrical pulse from draining harmlessly into the ground through the post.
Medium
3. Name the electric fence component, driven into moist soil, that completes the electrical circuit when an animal touches the live wire.
Answer: earth stake — Earth stakes, driven into moist soil and connected to the energiser, complete the electrical circuit, returning the pulse to the energiser via the ground.
