Various options are provided as possible answers to the following questions - NSC Mechanical Technology Fitting and Machining - Question 4 - 2023 - Paper 1
Question 4
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 (4.1 to 4... show full transcript
Worked Solution & Example Answer:Various options are provided as possible answers to the following questions - NSC Mechanical Technology Fitting and Machining - Question 4 - 2023 - Paper 1
Step 1
Identify the type of tool in FIGURE 4.1 below.
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Answer
The tool depicted in Figure 4.1 is a Thread-pitch gauge. This tool is used to measure the pitch or spacing of threads on a screw or bolt.
Step 2
Which ONE of the following is an advantage of cutting tools on a lathe, using the compound slide method?
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Answer
The advantage of cutting tools on a lathe using the compound slide method is that Long tapers can be cut, allowing for precise shaping of components.
Step 3
Which part(s) of the dividing head is used to set the distances between the holes on the index plate?
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The parts of the dividing head used to set the distances between the holes on the index plate are the Sector arms.
Step 4
Identify the part of a CNC milling machine in FIGURE 4.4 below.
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Answer
The part of the CNC milling machine shown in Figure 4.4 is the Tool magazine, which holds multiple cutting tools for automatic tool changing.
Step 5
Which hardness tester uses a diamond cone to indent material?
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Answer
The hardness tester that uses a diamond cone to indent material is the Rockwell hardness tester, known for its speed and accuracy.
Step 6
Identify part A of the screw thread micrometer shown in FIGURE 4.6 below.
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Answer
Part A of the screw thread micrometer is the Lock, which is used to secure the measurement achieved.
Step 7
What does the term stress mean?
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The term stress is defined as the internal resistance in a body to an external load, indicating how materials react under applied forces.
Step 8
Identify the type of force that is exerted onto the casing of the pop rivet.
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Answer
The type of force exerted onto the casing of the pop rivet, as shown in Figure 4.8, is Compressive force, which holds the materials together.
Step 9
... is used to strengthen fiberglass used for boats and motor vehicle bodies.
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Answer
Glass is used to strengthen fiberglass, providing additional structural integrity to the materials used in boats and motor vehicles.
Step 10
Identify the material that bushes are made of:
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Bushes are commonly made of PVC, which provides durability and resistance to wear.
Step 11
What is the included angle of a metric V-screw thread?
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The included angle of a metric V-screw thread is typically 60°.
Step 12
Identify the type of screw thread that produces a faster movement.
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The type of screw thread that produces a faster movement is the Multiple-start screw thread, facilitating quicker advancements.
Step 13
Identify the type of gear system in FIGURE 4.13 below.
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The gear system depicted in Figure 4.13 is a Rack and pinion gear system, known for its ability to convert rotational motion into linear motion.
Step 14
Pneumatics uses compressed ... to operate equipment.
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Pneumatics uses compressed air to operate equipment, allowing for efficient and powerful mechanical movements.