A farmer has to erect an electric fence around the buildings on the farm for security reasons - NSC Agricultural Technology - Question 2 - 2017 - Paper 1
Question 2
A farmer has to erect an electric fence around the buildings on the farm for security reasons.
2.1.1 Name the minimum size of the warning sign for an electric fence... show full transcript
Worked Solution & Example Answer:A farmer has to erect an electric fence around the buildings on the farm for security reasons - NSC Agricultural Technology - Question 2 - 2017 - Paper 1
Step 1
Name the minimum size of the warning sign for an electric fence.
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Answer
The minimum size of the warning sign for an electric fence should be at least 100 mm x 200 mm.
Step 2
Write down the minimum distance between two separate electric fences with different energizers.
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Answer
The minimum distance required between two separate electric fences powered by different energizers is 2 meters.
Step 3
Name the depth to which the earth electrode must penetrate the soil when a high output energizer is used.
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Answer
When using a high output energizer, the earth electrode must penetrate the soil to a depth of 1 meter.
Step 4
How would you know when an isolator, like the one below, is cracked?
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Answer
An isolator that is cracked can be identified by observing signs that it makes sparks, which can cause interference, and also visually inspecting it for any visible cracks or damage.
Step 5
How are electric fence wires protected against rust?
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Answer
Electric fence wires are protected against rust through galvanization or copper coating.
Step 6
Make a neat freehand drawing of a standard electric fence with various essential components.
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Answer
The drawing should include the following components:
Battery
Energizer
Poles
Wire
Isolator
Earth spike
It is essential to label at least one of these components and ensure the layout is correct.
