1.1 Various options are provided as possible answers to the following questions - NSC Agricultural Technology - Question 1 - 2018 - 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 numbers (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 - 2018 - Paper 1
Step 1
1.1.1 The ... is used to remove welding spatter from metal.
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Answer
The correct answer is C: angle grinder, as it is the most effective tool for removing welding spatter from metal surfaces.
Step 2
1.1.2 The ... is used to remove a bearing from an alternator shaft without damaging the components.
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Answer
The correct answer is D: bearing puller, as it is specifically designed for safely extracting bearings without causing harm to the shaft or other components.
Step 3
1.1.3 The ideal number of teeth per 25 mm on a hacksaw blade used to cut 20 mm solid aluminium bar:
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Answer
The correct answer is B: 18 teeth per 25 mm, which provides a good balance between cutting speed and finish for aluminium.
Step 4
1.1.4 ... is used for the manufacturing of O rings.
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Answer
The correct answer is B: Teflon, which is commonly used for manufacturing O-rings due to its high chemical resistance and durability.
Step 5
1.1.5 This material should NOT be ground with a bench grinder because the arc that the grinding wheel produces causes the wheel to shatter.
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Answer
The correct answer is C: Copper, as grinding copper can lead to dangerous situations due to the metal's properties, such as its tendency to create sparks.
Step 6
1.1.6 The use of compressed air in the farm workshop is associated with ....
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Answer
The correct answer is A: soldering, where compressed air is often utilized for cooling or cleaning during the process.
Step 7
1.1.7 Incorrect calibration of a diesel pump on a tractor can be identified by ....
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Answer
The correct answer is A: black smoke exiting the exhaust, which indicates an improper fuel-air mixture in the engine.
Step 8
1.1.8 Modern technological systems, such as ...., are used to notify the operator when grain is blocking the system in a combine harvester.
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Answer
The correct answer is B: flow sensors, which are employed in agricultural machinery to monitor grain flow.
Step 9
1.1.9 The drain pipe connecting the toilet to the septic tank is made from ....
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Answer
The correct answer is B: PVC, which is a common material for drain pipes due to its durability and resistance to corrosion.
Step 10
1.1.10 The most suitable all-purpose fire extinguisher for a welding workshop:
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Answer
The correct answer is D: Dry powder extinguisher, as it is effective for various types of fires including those caused by flammable metals.
Step 11
1.2.1 Safety signs attached to an electric fence must be made of plastic with a red background.
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Answer
The correct answer is yellow.
Step 12
1.2.2 A newspaper is the most effective type of communication to inform farm neighbours about an immediate emergency.
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Answer
The correct answer is cell phone/two way radio.
Step 13
1.2.3 A one-way valve is a device that is capable of adjusting the water delivering line in response to current environmental conditions.
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Answer
The correct answer is smart controller.
Step 14
1.2.4 Compressed air is used as a hydraulic fluid in a car's toilet.
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Answer
The correct answer is oil.
Step 15
1.2.5 Steel that has a copper coating produces poisonous gases when subjected to welding.
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Answer
The correct answer is zinc.
Step 16
1.3.1 Alloy elements used in the manufacturing of stainless steel.
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Answer
The correct answer is D: chromium and nickel.
Step 17
1.3.2 A heat-resistant plastic.
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Answer
The correct answer is G: bakelite.
Step 18
1.3.3 The MIG welding defect that occurs when the gap between the nozzle and the work piece is excessive.
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Answer
The correct answer is B: cracking.
Step 19
1.3.4 The gas with the highest cutting capacity used for plasma cutting.
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Answer
The correct answer is E: acetylene.
Step 20
1.3.5 A highly flammable gas that is commonly used in the workshop.
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