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 is 100 mm × 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 between two separate electric fences with different energizers is 2 m.
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
The earth electrode must penetrate the soil to a depth of 1 m when a high-output energizer is used.
Step 4
How would you know when an isolator, like the one below, is cracked?
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Answer
You would know when an isolator is cracked if it makes sparks and thereby causes interference, or if you notice visual signs of damage.
Step 5
How are electric fence wires protected against rust?
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Answer
Electric fence wires are protected against rust by using galvanizing or copper coating.
Step 6
Make a neat freehand drawing of a standard electric fence with various essential components.
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Answer
A standard electric fence includes the following components:
Battery
Energizer
Fence poles
Isolator
Earth electrode (earth spikes)
Make sure to include one label in your drawing, maintain a correct layout, and show at least any four components.
