1.1 Various options are provided as possible answers to the following questions - NSC Agricultural Technology - Question 1 - 2017 - Paper 1
Question 1
1.1 Various options are provided as possible answers to the following questions. Choose the answer and write only the letter (A–D) next to the question number (1.1.1... show full transcript
Worked Solution & Example Answer:1.1 Various options are provided as possible answers to the following questions - NSC Agricultural Technology - Question 1 - 2017 - Paper 1
Step 1
1.1.1 The best type of isolation material that is used to isolate an electric fence line from the supporting posts is ...
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The best type of isolation material for an electric fence is C. ceramic. Ceramic materials are non-conductive and can effectively isolate the electrical current, preventing it from escaping to the ground.
Step 2
1.1.2 There is a constant change in the angle between the welding rod and the work piece during this welding process:
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This describes A. Pipe welding. In pipe welding, the angle varies significantly to accommodate the curvature of the pipes being joined.
Step 3
1.1.3 The gas that must be removed when doing metal inert-gas (MIG) welding because it makes welding difficult:
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B. Oxygen must be removed as it can cause oxidation which weakens the weld. Helium and argon are typically used as welding gases in this process.
Step 4
1.1.4 Timing of the ram baler means the ...
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The timing of the ram baler refers to the A. exact moment when the needles lift the binding rope so that the compressed hay can be bound. This timing is crucial for ensuring efficient hay binding.
Step 5
1.1.5 The main function of the shear bolt is to act as a ... mechanism.
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The shear bolt functions primarily as a B. safety mechanism. It ensures that if excessive force is applied, the bolt will shear, thereby preventing damage to the equipment.
Step 6
1.1.6 The three-point mechanism was designed by ...
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The three-point mechanism is notably attributed to D. Harry Ferguson, who revolutionized tractor hitching systems.
Step 7
1.1.7 Black smoke from the exhaust of a tractor indicates...
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Black smoke typically indicates A. a too rich diesel mixture, suggesting incomplete combustion of fuel.
Step 8
1.1.8 Stainless steel is a combination of the following metals:
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C. Steel, chromium, magnesium and nickel are commonly recognized as key components in stainless steel formulations, contributing to its corrosion resistance.
Step 9
1.1.9 The synthetic material with the best heat resistance ability:
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A. Bakelite is renowned for its excellent heat resisting properties, making it suitable for various applications.
Step 10
1.1.10 Vibration in the hammer mill can be reduced by ...
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To reduce vibration, one effective method is C. using V-belts to drive the hammer mill. This can balance the load and minimize vibrations.
Step 11
1.2.1 Cast iron must be ...
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Cast iron must be heated/heat before it can be processed to prevent cracking.
Step 12
1.2.2 Deep holes are drilled into the earth until a ...
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heat/steam/thermal source for harnessing geothermal energy is found.
Step 13
1.2.3 The ... converts direct current into alternating current.
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inverter is the device that performs this function.
Step 14
1.2.4 Implements, equipment and machinery are examples of ... capital.
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movable capital, as they can be relocated or changed.
Step 15
1.2.5 A bearing is a machine component that ... friction between the moving component and the shaft.
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A bearing is designed to reduce/decrease/prevent/stop friction effectively.
Step 16
1.3.1 A drive system that draws tighter round the pulley when the tension on it increases
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This is described as H. V-belt which adjusts its tightness with changing load.
Step 17
1.3.2 The drive method that can drive a machine over a long distance
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G. chain, as it effectively transmits power over considerable distances.
Step 18
1.3.3 The pneumatic tool that is used in a workshop to fasten nuts and bolts
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F. air pressure wrench is designed specifically for this purpose.
Step 19
1.3.4 The device with the ability to control the fertilizer application rate on a planter
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D. weather station can provide the necessary data for adjustments.
Step 20
1.3.5 The source from which the central controller of a centre-pivot irrigation system receives A
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A. variable-rate technology (VRT) for optimal management.
