Various options are provided as possible answers to the following questions - NSC Agricultural Technology - Question 1 - 2022 - Paper 1
Question 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 numbers (1.1.1 to... show full transcript
Worked Solution & Example Answer:Various options are provided as possible answers to the following questions - NSC Agricultural Technology - Question 1 - 2022 - Paper 1
Step 1
1.1.1 The types of gases used in MIG welding:
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Answer
The gases used in Metal Inert Gas (MIG) welding typically include argon, helium, and carbon dioxide (CO₂). Among the options provided, the correct choice is A: Argon, helium and CO₂.
Step 2
1.1.2 Typical voltage range of the plasma-cutting machine:
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Answer
Plasma-cutting machines usually operate within a voltage range of 220 to 230 volts. Therefore, the correct answer is C.
Step 3
1.1.3 A pneumatic tool that can be used to loosen wheel nuts on a tractor:
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Answer
A ratchet spanner is often used in pneumatic applications to loosen wheel nuts effectively. Thus, the correct answer is C: Ratchet spanner.
Step 4
1.1.4 Which ONE of the following is regarded as a secondary cultivation tool?
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Answer
Among the options, a rotavator is classified as a secondary cultivation tool. The correct choice is B: Rotavator.
Step 5
1.1.5 A lawnmower cutting blade is manufactured from ...
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Answer
Lawnmower cutting blades are typically made from carbon steel due to its durability and sharpness retention. Hence, the answer is A: carbon steel.
Step 6
1.1.6 Which ONE of the following can NOT be used to provide drive from the tractor to the water pump on a crop sprayer?
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Answer
The option that cannot provide drive from the tractor to the water pump is the V-belt, thus the answer is A: V-belt.
Step 7
1.1.7 The ram-type baler is fitted with a ... attached to the side of the ram to separate the hay in the baling chamber from the rest.
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Answer
The characteristic component used to separate hay within a baler is the packing arm. Hence, the answer is A: packing arm.
Step 8
1.1.8 This action causes a wind turbine to work less efficiently:
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Answer
Lack of maintenance can significantly impede the efficiency of wind turbines. Therefore, the answer is D: Lack of maintenance.
Step 9
1.1.9 The energy contained in sunrays:
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Answer
The energy from sunrays is classified as solar energy. Thus, the correct answer is C: Solar.
Step 10
1.1.10 ... changes the band structure of stainless steel and causes a reduction in striking strength.
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Answer
Manganese is known to alter the band structure of stainless steel, thus affecting its striking strength. Therefore, the answer is A: Manganese.
Step 11
1.2.1 The black gas hose of the cutting torch is connected to the acetylene gas cylinder.
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Answer
The correct word to replace 'black' is 'red'. Thus, it should read: The red gas hose of the cutting torch is connected to the acetylene gas cylinder.
Step 12
1.2.2 Brazing is a welding process during which worn parts can be built up by padding with a wear-resistant metal.
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Answer
The underlined term 'wear-resistant metal' should be replaced with 'hard facing'. Thus, it should read: Brazing is a welding process during which worn parts can be built up by padding with a hard facing.
Step 13
1.2.3 Air pollution is a serious health risk that can cause stress, fatigue and damage to the ears.
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Answer
The proper term to describe this health risk is 'noise pollution'. Therefore, it should say: 'Noise pollution is a serious health risk that can cause stress, fatigue, and damage to the ears.'
Step 14
1.2.4 VRT systems can be used to pinpoint the exact position up to one metere.
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Answer
The appropriate term to replace 'meter' is 'GPS'. Thus, it should read: 'VRT systems can be used to pinpoint the exact position using GPS.'
Step 15
1.2.5 Oval bales are easily handled and storage space is optimally utilised.
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Answer
The correct term to describe the type of bales being referenced is 'rectangular bales'. Therefore, it should read: 'Rectangular bales are easily handled and storage space is optimally utilized.'
Step 16
1.3.1 A method of harvesting maize in wet conditions
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Answer
The method used for harvesting maize in wet conditions is referred to as 'combine harvester'. Thus, the answer is E.
Step 17
1.3.2 A major cause of metal fatigue in a hammer mill
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Answer
The major cause of metal fatigue in a hammer mill is attributed to 'vibration'. Hence, the answer is G.
Step 18
1.3.3 A welding rod used to weld repair parts
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Answer
The appropriate term for a welding rod used for this purpose is 'nickel'. Therefore, the answer is C.
Step 19
1.3.4 A material that can be welded with a MIG welder
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Answer
A suitable material that can be welded with a MIG welder is 'aluminium'. Thus, the answer is F.
Step 20
1.3.5 The tool used to light the oxyacetylene welding flame.
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Answer
The tool used for lighting this flame is known as a 'flint lighter'. Hence, the answer is D.
